AIR CONDITIONING
4.3L
4.3L (VIN W), Air Conditioning Wiring Diagrams for Chevrolet Forward Control P12 1998
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List of elements for 4.3L (VIN W), Air Conditioning Wiring Diagrams for Chevrolet Forward Control P12 1998:
- (engine harn, 13 cm from a/c compressor high pressure cutoff switch breakout)
- (engine harn, 30 cm from maf sensor breakout)
- (engine harness, near maf sensor)
- (provisions for body builder hvac system)
- A/c compressor clutch
- A/c compressor clutch relay (engine firewall relay bracket)
- A/c compressor high pressure cutoff switch (rear of a/c compressor)
- A/c compressor refrigerant pressure switch (a/c accumulator)
- A/c compressor refrigerant pressure switch (on a/c accumulator)
- A/c enable
- A/c ground
- A/c request
- Diode
- Eng-bat fuse 15a
- G112 (rear of left cylinder head)
- G200 (left interior bulkhead)
- Gauges fuse 20a
- Hot at all times
- Hot in run or start
- I/p fuse block
- Pnk
- R100 (engine harness, 30 cm from maf sensor breakout)
- S110 (engine harness, near bulkhead grommet)
- S124
- S125 (engine harness, 13 cm from a/c high pressure switch breakout)
- S132 (engine harness, near maf sensor)
- S142
- S143
- S144 (engine harness, near firewall grommet)
- Vehicle control module (left side of engine compt)
5.7L
5.7L (VIN R), Air Conditioning Wiring Diagrams for Chevrolet Forward Control P12 1998
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List of elements for 5.7L (VIN R), Air Conditioning Wiring Diagrams for Chevrolet Forward Control P12 1998:
- (engine harn, 13 cm from a/c compressor high pressure cutoff switch breakout)
- (engine harn, 30 cm from maf sensor breakout)
- (engine harness, near maf sensor)
- (provisions for body builder hvac system)
- A/c compressor clutch
- A/c compressor clutch relay (engine firewall relay bracket)
- A/c compressor high pressure cutoff switch (rear of a/c compressor)
- A/c compressor refrigerant pressure switch (a/c accumulator)
- A/c compressor refrigerant pressure switch (on a/c accumulator)
- A/c enable
- A/c ground
- A/c request
- Diode
- Eng-bat fuse 15a
- G112 (rear of left cylinder head)
- G200 (left interior bulkhead)
- Gauges fuse 20a
- Hot at all times
- Hot in run or start
- I/p fuse block
- Pnk
- R100 (engine harness, 30 cm from maf sensor breakout)
- S110 (engine harness, near bulkhead grommet)
- S124
- S125 (engine harness, 13 cm from a/c high pressure switch breakout)
- S132 (engine harness, near maf sensor)
- S142
- S143
- S144 (engine harness, near firewall grommet)
- Vehicle control module (left side of engine compt)
6.5L
6.5L (VIN F), Air Conditioning Wiring Diagrams for Chevrolet Forward Control P12 1998
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List of elements for 6.5L (VIN F), Air Conditioning Wiring Diagrams for Chevrolet Forward Control P12 1998:
- (body builder installed)
- (engine harn, near firewall grommet)
- (provisions for body builder hvac system)
- A/c compressor clutch
- A/c compressor control relay (right side of driver's island)
- A/c compressor high pressure cutoff switch (in high pressure line)
- A/c compressor refrigerant pressure switch (rear of a/c compressor)
- A/c enable
- A/c request
- Diode
- Eng-bat fuse 15a
- G206 (below driver's island)
- Gauges fuse 20a
- Hot at all times
- Hot in run
- I/p fuse block
- Pnk
- Powertrain control module (left side of driver's island)
- R100 (engine harness, 30 cm from maf sensor breakout)
- S115 (engine harness, near firewall grommet)
- S122 (engine harness, 20 cm from a/c compressor)
- S123 (engine harness, 25 cm from a/c compressor clutch)
- S140
- S141 (engine harness, near firewall grommet)
- S168
- S203 (i/p harness, near firewall grommet)
6.5L (VIN Y), Air Conditioning Wiring Diagrams for Chevrolet Forward Control P12 1998
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List of elements for 6.5L (VIN Y), Air Conditioning Wiring Diagrams for Chevrolet Forward Control P12 1998:
- (engine harn, 13 cm from a/c compressor high pressure cutoff switch breakout)
- (provisions for body builder hvac system)
- A/c compressor clutch
- A/c compressor clutch relay (engine firewall relay bracket)
- A/c compressor high pressure cutoff switch (rear of a/c compressor)
- A/c compressor refrigerant pressure switch (on a/c accumulator)
- Control module)
- Diode
- Eng-bat fuse 15a
- G200 (left interior bulkhead)
- Hot at all times
- I/p fuse block
- S125 (engine harness, 13 cm from a/c high pressure switch breakout)
- S144 (engine harness, 19 cm from a/c compressor clutch relay breakout)
- Vehicle control module (left side of engine compt)
- W/ vcm
- W/o vcm
7.4L
7.4L (VIN J), Air Conditioning Wiring Diagrams for Chevrolet Forward Control P12 1998
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List of elements for 7.4L (VIN J), Air Conditioning Wiring Diagrams for Chevrolet Forward Control P12 1998:
- (body builder installed)
- (engine harn, 20 cm from cruise control module breakout)
- (provisions for body builder hvac system)
- A/c compressor clutch
- A/c compressor clutch relay (right side of driver's island)
- A/c compressor high pressure cutoff switch (rear of a/c compressor)
- A/c compressor refrigerant pressure switch (a/c accumulator)
- A/c enable
- A/c ground
- A/c request
- Diode
- Eng-bat fuse 15a
- G206 (below driver's island)
- Gauges fuse 20a
- Hot at all times
- Hot in run
- I/p fuse block
- Pnk
- R100 (engine harness, 30 cm from maf sensor breakout)
- S115 (engine harness, near firewall grommet)
- S122 (engine harness, 15 cm from a/c compressor)
- S123 (engine harness, 15 cm from a/c compressor clutch)
- S126
- S140
- S141 (iengine harness, near firewall grommet)
- S203 (i/p harness, near firewall grommet)
- Vehicle control module (center front of engine compt)
ANTI-LOCK BRAKES
Anti-lock Brake Wiring Diagrams, Commercial Chassis for Chevrolet Forward Control P12 1998
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List of elements for Anti-lock Brake Wiring Diagrams, Commercial Chassis for Chevrolet Forward Control P12 1998:
- (ebcm harn, near right side of radiator)
- (i/p harn, above steering column)
- (i/p harn, left side of bulkhead)
- (left frame rail)
- (near steering column) data link connector
- (rear of left cylinder head)
- Abs ind
- Abs lamp control
- Brake diode d101 (underhood fuse-relay center)
- Brake ind
- Brake lamp control
- Brake pressure differential switch
- Brake sw input
- Brake sw output
- C1 tcc/ stoplamp switch
- Diesel
- Ebcm ground
- Electronic brake control module (below radiator of first crossmember)
- G100
- G114
- Gasoline
- Gauges fuse 8 20a
- Hot at all times
- Hot in run
- Hot in run or start
- I-3 fuse 15a
- I/p fuse block
- Ign
- Instrument cluster
- Left front wheel speed sensor
- Lft frt sensor (+)
- Lft frt sensor (-)
- Pnk
- Pump motor ground
- Pump motor power
- Red
- Right front wheel speed sensor
- Rt frt sensor (+)
- Rt frt sensor (-)
- S149 (i/p harn, 10 cm from before i/p fuse block breakout)
- S150
- S154
- S162
- S167
- S200
- Serial data line
- Serial data signal
- Tan
- Vehicle control module (left side of engine compt)
- Vehicle speed sig
- Vss buffer (left side of interior bulkhead)
- Vss sig
Anti-lock Brake Wiring Diagrams, Motor Home Chassis for Chevrolet Forward Control P12 1998
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List of elements for Anti-lock Brake Wiring Diagrams, Motor Home Chassis for Chevrolet Forward Control P12 1998:
- (abs harn, near breakout to abs ground)
- (body builder installed)
- (i/p harn, above steering column)
- (i/p harn, left side of bulkhead)
- (near steering column) data link connector
- Abs ind
- Abs lamp control
- Brake diode d101 (underhood fuse-relay center)
- Brake ind
- Brake lamp control
- Brake pressure differential switch
- Brake sw input
- Diesel
- Ebcm ground
- Electronic brake control module (below radiator of first crossmember)
- Gasoline
- Gauges fuse 20a
- Hot at all times
- Hot in run
- Hot in run or start
- I-3 fuse 15a
- I/p fuse block
- Ign
- Instrument cluster
- Left front wheel speed sensor
- Lft frt sensor (+)
- Lft frt sensor (-)
- Pnk
- Pump motor ground
- Pump motor power
- Red
- Right front wheel speed sensor
- Rt frt sensor (+)
- Rt frt sensor (-)
- S150
- S161
- S162
- S200
- S207
- S214 (i/p harn, left side of bulkhead)
- Serial data line
- Serial data signal
- Tan
- Tcc/ stoplamp switch
- Vehicle control module (left side of engine compt)
- Vehicle speed sig
- Vss buffer (left side of interior bulkhead)
- Vss sig
COMPUTER DATA LINES
Computer Data Lines, Commercial Chassis for Chevrolet Forward Control P12 1998
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List of elements for Computer Data Lines, Commercial Chassis for Chevrolet Forward Control P12 1998:
- (body builder ground)
- B10
- Data clss 2
- Data link connector (below dash, near steering column)
- Diesel
- Electronic brake control module (below radiator, on first crossmember)
- Eng bat fuse 10 15a
- G114 (left rear of engine)
- Gasoline
- Hot at all times
- I/p fuse block
- S110
- S143
- S144
- S150 (dash harn, approx 17 cm from breakout to steering column connector)
- S168
- Serial data
- Tan
- Transmission control module (diesel a/t only) (on left interior firewall, on top of relay bracket)
- Vehicle control module (gasoline only) (4.3/5.7l: on left side of engine compt) (7.4l: on center front of engine compt)
Computer Data Lines, Motor Home Chassis for Chevrolet Forward Control P12 1998
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List of elements for Computer Data Lines, Motor Home Chassis for Chevrolet Forward Control P12 1998:
- (body builder ground)
- Data clss 2
- Data link connector (below dash, near steering column)
- Diag sig
- Diesel
- Electronic brake control module (below radiator, on first crossmember)
- Eng bat fuse 10 15a
- Gasoline
- Hot at all times
- I/p fuse block
- Powertrain control module (on left side of driver's island)
- S141
- S166
- S202 (dash harness, 15 cm from vcm or abs harness breakout)
- S203
- S212
- Serial data
- Vehicle control module (on center front of engine compt)
COOLING FAN
6.5L
6.5L (VIN F), Cooling Fan Wiring Diagram for Chevrolet Forward Control P12 1998
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List of elements for 6.5L (VIN F), Cooling Fan Wiring Diagram for Chevrolet Forward Control P12 1998:
- Auxiliary engine coolant fan a/c pressure switch (in a/c high pressure line)
- Auxiliary fan control switch
- Eng 1 fuse 20a
- Engine coolant fan motor
- Fan control relay (main support bracket, behind steering column)
- G200 (left interior bulkhead)
- Hot at all times
- Hot in run
- I/p fuse block
- Pnk
- Red
- S113 (engine harness, 5 cm from breakout for wiper motor)
- S128 (engine harness, 12 cm from glowplug control)
- S203 (i/p harness, 14 cm from firewall grommet)
6.5L (VIN Y), Cooling Fan Wiring Diagram for Chevrolet Forward Control P12 1998
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List of elements for 6.5L (VIN Y), Cooling Fan Wiring Diagram for Chevrolet Forward Control P12 1998:
- Auxiliary engine coolant fan
- Auxiliary engine coolant fan a/c pressure switch (in a/c high pressure line)
- Auxiliary engine coolant fan relay (engine firewall relay bracket, under battery junction block)
- Eng 1 fuse 20a
- G200 (left interior bulkhead)
- Hot at all times
- Hot in run and start
- I/p fuse block
- Pnk
- Red
- S110 (engine harness, 4 cm from electronic brake control module)
- S116 (engine harness, 5 cm from right glow plug breakout)
7.4L
7.4L (VIN J), Cooling Fan Wiring Diagram for Chevrolet Forward Control P12 1998
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List of elements for 7.4L (VIN J), Cooling Fan Wiring Diagram for Chevrolet Forward Control P12 1998:
- Auxiliary engine coolant fan a/c pressure switch (in a/c high pressure line)
- Eng bat fuse 15a
- Engine coolant fan motor
- Fan comntrol relay (main support bracket, behind steering column)
- G200 (left interior bulkhead)
- Hot at all times
- I/p fuse block
- Red
- S141 (engine harness, near firewall breakout)
- Vehicle control module (center front of engine compt)
CRUISE CONTROL
6.5L
6.5L (VIN F), Cruise Control Wiring Diagram, Motor Home Chassis for Chevrolet Forward Control P12 1998
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List of elements for 6.5L (VIN F), Cruise Control Wiring Diagram, Motor Home Chassis for Chevrolet Forward Control P12 1998:
- (engine harn, 16 cm from bulkhead grommet)
- (i/p harness, 8 cm from breakout for steering column)
- A11
- B10
- B11
- Cruise on input
- D10
- Disengage input
- Hazard lamps flasher
- Hot at all times
- Hot in run
- I-3 fuse 9 15a
- I/p fuse block
- Multifunction lever
- Nca
- Off
- Powertrain control module (pcm) (left side of driver's island)
- R/a
- Resume/accel input
- S/c
- S116
- S124
- S200
- Set/coast input
- Stop/haz fuse 11 15a
- Stoplamp switch (top of brake pedal)
- Torque converter clutch and stoplamps switch (right side of steering column upper support)
- Vehicle speed sensor buffer (above accelerator pedal)
- Vss hi
- Vss lo
7.4L
7.4L (VIN J), Cruise Control Wiring Diagram, Motor Home Chassis for Chevrolet Forward Control P12 1998
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List of elements for 7.4L (VIN J), Cruise Control Wiring Diagram, Motor Home Chassis for Chevrolet Forward Control P12 1998:
- (engine harn, 11 cm from breakout to cruise module)
- (engine harn, 45 cm from breakout for map sensor)
- (rear of transmission)
- 4000 pulses/mile
- Cruise control module (radiator support bracket)
- Cruise control switch
- Cruise on input
- Cruise status
- Disengage input
- Ground
- Hazard lamps flasher
- Hot at all times
- Hot in run
- I-3 fuse 9 15a
- I/p fuse block
- Ignition
- Nca
- Off
- R/a
- Resume/accel input
- S/c
- S116
- S124
- S126
- S200
- Set/coast input
- Stop/haz fuse 11 15a
- Stoplamp switch (top of brake pedal)
- Torque converter clutch and stoplamps switch (right side of steering column upper support)
- Vehicle control module (vcm) (top of radiator support)
- Vehicle speed input
- Vehicle speed sensor (vss)
- Vss return
- Vss signal
ENGINE PERFORMANCE
4.3L
4.3L (VIN W), Engine Performance Wiring Diagrams, Commercial Chassis (1 of 4) for Chevrolet Forward Control P12 1998
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List of elements for 4.3L (VIN W), Engine Performance Wiring Diagrams, Commercial Chassis (1 of 4) for Chevrolet Forward Control P12 1998:
- (on throttle body assembly) idle air control (iac) valve
- (right front of engine at crankshaft balancer pulley)
- (thermostat housing) g125
- (top right side of engine) evaporative emissions (evap) canister purge solenoid valve
- 1-2 shift sol ctrl
- 2-3 shift sol ctrl
- 3x ckp sens sig
- A pnk
- Anti- lock brake system
- Cam posit sens rtn
- Cam posit sens sig
- Camshaft position (cmp) sensor (in distributor)
- Ckp sens rtn
- Crankshaft position (ckp) sensor
- Ect sensor input
- Egr posit input
- Evaporative emissions (evap) canister vent solenoid valve (left side of canister bracket)
- Feed ign a pnk
- Fuel inj no.1 ctrl
- Fuel inj no.2 ctrl
- Fuel inj no.3 ctrl
- Fuel inj no.4 ctrl
- Fuel inj no.5 ctrl
- Fuel inj no.6 ctrl
- Fuel lev
- G114 (rear of left cylinder head)
- Hall effect sensor
- Heated oxygen sensor bank 1, sensor 1 pre-convertor (left exhaust pipe ahead of catalytic converter)
- Ho2s bnk1 sens1 gnd
- Ho2s bnk1 sens1 sig
- Ho2s bnk2 sens1 gnd
- Ho2s bnk2 sens1 sig
- Ho2s post sens2 gnd
- Ho2s post sens2 sig
- Iat sens sig
- Idle air ctrl (a-low)
- Idle air ctrl (b-low)
- Idle air ctrl (iac) a-hi
- Idle air ctrl (iac) b-hi
- Knock sens sig
- Knock sensor (ks) (rear of engine, top center)
- Map sensor input
- Mass air flow input
- Nca
- Pnk
- Pnk c
- Pnk d
- Pnk pnk pnk
- Power
- Purge vent ctrl
- S138
- S139
- S140
- S143
- System ground
- Tan
- Tank press sens
- Tank pressure sensor (top of fuel tank)
- Tcc pwm sol ctrl
- Tft sig
- Throttle position sens
- Vehicle control module (vcm) (on left side of engine compartment)
- Vehicle speed out
- Vehicle speed sensor (vss) (left rear of transmission, near center)
- Vss rtn
- Vss sig
- Whl spd sig, left frt
4.3L (VIN W), Engine Performance Wiring Diagrams, Commercial Chassis (2 of 4) for Chevrolet Forward Control P12 1998
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List of elements for 4.3L (VIN W), Engine Performance Wiring Diagrams, Commercial Chassis (2 of 4) for Chevrolet Forward Control P12 1998:
- (rear of left cylinder head) g114
- (top front of engine) exhaust gas recirculation (egr) valve
- 1-2 shift solenoid
- 2-3 shift solenoid
- Automatic transmission (a/t) (if equipped) (rear of engine)
- Ecm 2 fuse 12 20a
- Eng 1 fuse 15 20a
- Fuel injector no.1
- Fuel injector no.2
- Fuel injector no.3
- Fuel injector no.4
- Fuel injector no.5
- Fuel injector no.6
- Heated oxygen sensor bank 2, sensor 1 (right exhaust pipe ahead of catalytic converter)
- Heated oxygen sensor, bank 1 sensor 2 (exhaust pipe behind catalytic converter)
- Hot in run & start
- I/p fuse block (dash panel provided by body builder) (body builder installed)
- Nca
- Pnk
- Pnk d
- Pnk n
- Pressure control solenoid (pcs)
- Red
- Red p
- Rev
- S108
- S116
- S118
- S145
- Tan
- Tan a
- Tcc pwm solenoid
- Trans fuse 17 10a
- Transmission fluid temperature (tft) sensor
- Transmission range (tr) pressure switch assembly
4.3L (VIN W), Engine Performance Wiring Diagrams, Commercial Chassis (3 of 4) for Chevrolet Forward Control P12 1998
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List of elements for 4.3L (VIN W), Engine Performance Wiring Diagrams, Commercial Chassis (3 of 4) for Chevrolet Forward Control P12 1998:
- (eng harn, approx 13cm from tps breakout)
- (eng harn, approx 8cm from ect sensor breakout)
- (eng harn, approx 8cm from tps breakout) s136
- (engine harn, 7 cm from ebcm breakout)
- (tail & stop lamps extension harness at crossmember in front of fuel tank) g415
- 5v ref
- A/c compressor high pressure cut-off switch (rear of a/c compressor)
- Eng bat fuse 10 15a
- Engine coolant temperature (ect) sensor (top front of engine)
- Fuel gauge
- Fuel pump switch & engine oil pressure gauge sensor (top left rear of engine)
- Fuel sender & fuel pump (top of fuel tank)
- G114 (rear of left cylinder head)
- G114 (rear of left cylinder head)
- Gauges fuse 8 10a
- Hot at all times
- Hot in run & start
- I/p fuse block (dash panel provided by body builder) (body builder installed)
- Instrument cluster
- Intake air temperature (iat) sensor (mounted in fresh air intake, behind filter box)
- Malfunction indicator lamp
- Manifold absolute pressure (map) sensor (top rear of engine)
- Map
- Mass air flow sensor (maf) (mounted in fresh air intake, behind air filter box)
- Nca
- Oil press gauge
- Pnk
- Pnk pnk pnk
- R100 (1100 ohms .75 watts)
- Red
- Ref lo
- S119 (eng harn, approx 11cm from ect sensor breakout)
- S135
- S137
- S138
- S142 (eng harn, approx 23cm from maf sensor breakout)
- S144
- S145
- S207
- S218
- S406
- Speedo meter
- Tacho meter
- Tan
- Tan a
- Temp
- Throttle position (tp) sensor (on throttle body, top of engine)
4.3L (VIN W), Engine Performance Wiring Diagrams, Commercial Chassis (4 of 4) for Chevrolet Forward Control P12 1998
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List of elements for 4.3L (VIN W), Engine Performance Wiring Diagrams, Commercial Chassis (4 of 4) for Chevrolet Forward Control P12 1998:
- (i/p harn, 17 17 cm from breakout to bulkhead conn)
- (i/p side of eng harn, approx 19cm from left bulkhead grommet toward ignition sw)
- (left interior bulkhead near relay bracket) (body builder installed) g202
- (rear of left cylinder head)
- (rear of left cylinder head) g114
- 5v ref
- 5v return
- 87a
- A/c request sig
- A/c system
- A/t input speed sensor (transmission, left front)
- Anti-lock brakes system
- Brake sig
- Clutch pedal position switch (left side of brake pedal bracket)
- Clutch sig
- Cylinder no.1
- Cylinder no.2
- Cylinder no.3
- Cylinder no.4
- Cylinder no.5
- Cylinder no.6
- Data link connector (dlc) (partial) (below dash, near steering column)
- Distributor (top rear of engine)
- Ecm b fuse 6 20a
- Egr valve ctrl
- Evap can purge ctrl
- Feed ignition
- Fuel level
- Fuel pump prime connector (taped to fuel pump relay breakout)
- Fuel pump relay (on fire- wall, under battery junction block)
- Fuel pump rly ctrl
- G114
- Ground
- High voltage coil wire
- Hot at all times
- Hot in run
- I-3 fuse 9 15a
- I/p fuse block (dash panel provided by body builder) (body builder installed)
- Ign feed
- Ignition coil (top right side of engine)
- Ignition control module (right top of engine)
- Input spd sens rtn
- Input spd sens sig
- Mil ctrl
- Pcs sol (hi)
- Pcs sol (lo)
- Pnk
- Pnk a
- Pressure switch in
- Range sig "a"
- Range sig "b"
- Range sig "c"
- Red
- Relay ctrl
- Return control
- S133
- S134
- S138
- S143
- S150
- S200
- Serial data
- Shift interlock system
- Signal control timing
- Spark plugs
- System ground
- Tcc/stop lamps switch (right side of steering column upper support)
- Timing ctrl sig
- Vehicle control module (vcm) (left side of engine compartment)
- Vss output
5.7L
5.7L (VIN R), Engine Performance Wiring Diagrams, Commercial Chassis (1 of 4) for Chevrolet Forward Control P12 1998
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List of elements for 5.7L (VIN R), Engine Performance Wiring Diagrams, Commercial Chassis (1 of 4) for Chevrolet Forward Control P12 1998:
- (left side of air intake system) idle air control (iac) valve
- (right center of intake manifold) evaporative emissions (evap) canister purge solenoid valve
- (right front of engine at crankshaft balancer pulley) crankshaft position sensor (ckp)
- 1-2 shift sol ctrl
- 2-3 shift sol ctrl
- 4x ckp sens sig
- A pnk
- Anti-lock brake system
- C pnk
- Cam posit sens rtn
- Cam posit sens sig
- Camshaft position (cmp) sensor (in distributor)
- Ckp sens rtn
- Ect sensor in
- Egr posit in
- Evaporative emissions (evap) canister vent solenoid valve (left side of canister bracket)
- Fuel inj no.1 ctrl
- Fuel inj no.2 ctrl
- Fuel inj no.3 ctrl
- Fuel inj no.4 ctrl
- Fuel inj no.5 ctrl
- Fuel inj no.6 ctrl
- Fuel inj no.7 ctrl
- Fuel inj no.8 ctrl
- Fuel lev signal
- G114 (rear of left cylinder head)
- Hall effect sensor
- Heated oxygen sensor, bank 1 sensor 2 (left exhaust pipe ahead of catalytic converter)
- Heated oxygen sensor, bank 2 sensor 1 (right exhaust pipe ahead of catalytic converter)
- Ho2s bnk1 sens1 gnd
- Ho2s bnk1 sens1 sig
- Ho2s bnk1 sens2 gnd
- Ho2s bnk1 sens2 sig
- Ho2s bnk2 sens1 gnd
- Ho2s bnk2 sens1 sig
- Ho2s bnk2 sens2 gnd
- Ho2s bnk2 sens2 sig
- Iat sens sig
- Idle air ctrl (a-low)
- Idle air ctrl (b-low)
- Idle air ctrl (iac) a-hi
- Idle air ctrl (iac) b-hi
- Knock sens sig
- Knock sensor (ks) (lower right side of engine)
- Map sensor in
- Mass air flow in
- Nca
- Pnk
- Pnk d
- Pnk pnk
- Pnk pnk pnk
- Power
- Purge vent
- S138
- S139
- S140
- Tan
- Tan a
- Tank pressure
- Tank pressure sensor (top of fuel tank)
- Tcc pwm sol ctrl
- Tft sig
- Throttle posit sens
- Vehicle control module (vcm) (left side of engine compt)
- Vehicle speed out
- Vehicle speed sensor (vss) (left rear of transmission, near center)
- Vss rtn
- Vss sig
5.7L (VIN R), Engine Performance Wiring Diagrams, Commercial Chassis (2 of 4) for Chevrolet Forward Control P12 1998
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List of elements for 5.7L (VIN R), Engine Performance Wiring Diagrams, Commercial Chassis (2 of 4) for Chevrolet Forward Control P12 1998:
- (rear of left cylinder head) g114
- 1-2 shift solenoid
- 2-3 shift solenoid
- Automatic transmission (a/t) (if equipped) (rear of engine)
- Ecm-1 fuse 12 20a
- Eng 1 fuse 15 20a
- Exhaust gas recirculation (egr) solenoid valve (front left top of intake manifold)
- Fuel injector
- Heated oxygen sensor, bank 1 sensor 2 (left exhaust pipe behind catalytic converter)
- Heated oxygen sensor, bank 2 sensor 2 (right exhaust pipe behind catalytic converter)
- Hot in run & start
- I/p fuse block (dash panel provided by body builder) (body builder installed)
- Nca
- Pnk
- Pnk d
- Pnk n
- Pressure control solenoid (pcs)
- Red
- Red p
- Rev
- S108
- S116
- S118
- S145
- Tan
- Tan a
- Tcc pwm solenoid
- Transmission fluid temperature sensor
- Transmission range (tr) pressure switch assembly
5.7L (VIN R), Engine Performance Wiring Diagrams, Commercial Chassis (3 of 4) for Chevrolet Forward Control P12 1998
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List of elements for 5.7L (VIN R), Engine Performance Wiring Diagrams, Commercial Chassis (3 of 4) for Chevrolet Forward Control P12 1998:
- (eng harn, approx 30cm from maf sensor breakout)
- (eng harn, approx 8cm from ect sensor breakout) s135
- (eng harn, approx 8cm from tp sensor breakout)
- (rear of left cylinder head) g114
- (tail & stop lamps extension harness at crossmember in front of fuel tank) g415
- 5v ref
- A/c compressor high pressure cut-off switch (rear of a/c compressor)
- Eng-b fuse 10 15a
- Engine coolant temperature (ect) sensor (top front of engine)
- Fuel gauge
- Fuel pump switch & engine oil pressure gauge sensor (top left rear of engine)
- Fuel sender & fuel pump (top of fuel tank)
- G114 (rear of left cylinder head)
- Gauges fuse 8 20a
- Hot at all times
- Hot in (on) run & start (crank)
- I/p fuse block (dash panel provided by body builder) (body builder installed)
- Instrument cluster
- Intake air temperature (iat) sensor (in fresh air intake, behind air filter box)
- Manifold absolute pressure (map) sensor (top right rear of engine)
- Map
- Mass air flow (maf) sensor (in fresh air intake behind air filter box)
- Nca
- Oil press gauge
- Pnk
- R100 (1100 ohms .75 watts)
- Red
- Ref lo
- S119 (eng harn, approx 4cm from ect sensor breakout)
- S136
- S137 (eng harn, approx 12cm from tp sensor breakout)
- S138
- S142
- S144
- S145
- S207
- S218
- Service engine soon indicator
- Speedo meter
- Tacho meter
- Tan
- Tan a
- Temp
- Throttle position (tp) sensor (throttle body, top of engine)
- Trans fuse 17 10a
5.7L (VIN R), Engine Performance Wiring Diagrams, Commercial Chassis (4 of 4) for Chevrolet Forward Control P12 1998
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List of elements for 5.7L (VIN R), Engine Performance Wiring Diagrams, Commercial Chassis (4 of 4) for Chevrolet Forward Control P12 1998:
- (below dash,
- (i/p harn, above steering column)
- (i/p side of eng harn, approx 19cm from left bulkhead grommet)
- (left interior bulkhead near relay bracket) (body builder installed) g202
- (rear of left cylinder head)
- (rear of left cylinder head) g114
- 5v ref
- 5v rtn
- 87a
- A/c compressor enable
- A/c request sig
- A/c sw in
- A/c system
- A/t input speed sensor (transmission, left front)
- Anti-lock brake system
- Brake sig
- Clutch pedal position switch (top of clutch pedal support)
- Clutch sig
- Cylinder 1
- Cylinder 2
- Cylinder 3
- Cylinder 4
- Cylinder 5
- Cylinder 6
- Cylinder 7
- Cylinder 8
- Data link connector (dlc)
- Distributor (top rear of engine)
- Ecm-b fuse 6 20a
- Egr ctrl
- Evap canp valve driver
- Fuel lev
- Fuel pump a prime connector (taped to fuel pump relay breakout)
- Fuel pump relay (engine bulkhead relay bracket under battery junction block)
- Fuel pump rly ctrl
- G114
- Gnd
- Ground
- High voltage coil wire
- Hot at all times
- Hot in run
- I-3 fuse 9 15a
- I/p fuse block (dash panel provided by body builder) (body builder installed)
- Ign feed
- Ignition coil (top right side of engine)
- Ignition control module (bracket at top edge of right cylinder head)
- Ignition feed
- Input spd sens rtn
- Input spd sens sig
- Mil ctrl
- Near steering column)
- Pcs sol (hi)
- Pcs sol (lo)
- Pnk
- Pnk a
- Range sig "a"
- Range sig "b"
- Range sig "c"
- Red
- S110
- S133
- S134
- S138
- S143
- S150
- S200
- Serial data
- Shift interlock system
- Spark plugs
- System gnd
- Tcc/ stop lamps switch (right side of steering column upper support)
- Timing control return
- Timing control signal
- Timing ctrl sig
- Vehicle control module (vcm) (left side of engine compt)
- Vss output
6.5L
6.5L (VIN F), Engine Performance Wiring Diagrams, Motor Home Chassis (1 of 4) for Chevrolet Forward Control P12 1998
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List of elements for 6.5L (VIN F), Engine Performance Wiring Diagrams, Motor Home Chassis (1 of 4) for Chevrolet Forward Control P12 1998:
- (eng harn, 16 cm from battery jb stud d)
- (eng harn, 21 cm from left firewall grommet)
- (eng harn, 4 cm from glow plug controller breakout)
- (left rear of engine block) g114
- (lower left front of engine) crankshaft position sensor
- (on top right center of engine) boost pressure sensor
- (top of engine, in air intake) intake air temperature sensor
- (top right front of engine) engine coolant temperature sensor
- 1-2 shift solenoid valve
- 2-3 shift solenoid valve
- A/c request sig
- A10
- A11
- A12
- Antilock brakes system
- App 1 5 volt ref
- App 1 ground
- App 1 sig
- App 2 ground
- App 2 sig
- App 3 5 volt ref
- App 3 grd
- App 3 sig
- Automatic transmission
- Automatic transmission input shaft speed sensor (left side of transmission)
- B10
- B11
- B12
- Battery
- Boost and ckp 5 volt ref
- Boost sensor sig
- C10
- C11
- C12
- C13
- C14
- C15
- C16
- Camshaft posit sens
- Ckp sens input
- Closure gnd
- Closure signal
- Criuse set/coast sig
- Cruise on/off sig
- Cruise resume/acc req
- D10
- D11
- D12
- D13
- D14
- D15
- D16
- Ect signal
- Fuel lift pump sig
- Fuel pump rly ctrl
- Fuel temp grd
- Fuel temp sig
- Glow plug relay ctrl
- Glow plug sig
- Ground
- High res sig
- Iat sig
- Ignition
- On/off
- Oss high
- Oss low
- Oss sig
- Output shaft speed sensor
- Pnk
- Powertrain control module (pcm) (left side of driver's island)
- Press ctrl sol vlv hi
- Press ctrl sol vlv lo
- Pressure control solenoid valve
- Pump cam 5 volt ref
- Range mode selector
- Red
- Resume
- S119
- S160
- S163
- S166
- Sensor gnd
- Set
- Solid state
- Speed control switch
- Stoplamp switch
- Tan
- Tcc pwm solenoid valve
- Tcc/abs brake sw
- Tft sensor
- Timing stepper mtr (high)
- Timing stepper mtr (low)
- Tr switch a
- Tr switch b
- Tr switch c
- Trans input speed sig
- Transmission speed input
- Transmission temperature sensor
- Vehicle speed sensor buffer (on left side of interior bulkhead, mounted under bracket)
- Vss out
- Vss signal
6.5L (VIN F), Engine Performance Wiring Diagrams, Motor Home Chassis (2 of 4) for Chevrolet Forward Control P12 1998
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List of elements for 6.5L (VIN F), Engine Performance Wiring Diagrams, Motor Home Chassis (2 of 4) for Chevrolet Forward Control P12 1998:
- (at rear of brake pedal support bracket)
- 5 volt ref
- Accelerator pedal position module (attached to accelerator pedal)
- App 1 sensor
- App 2 sensor
- App 3 sensor
- B fuel sol ctrl
- B pump cam sig
- Brake transmission shift interlock (btsi) relay (mounted on top of support bracket at driver's island)
- C closure grd
- C high res sig
- Closure signal
- D ignition
- D sensor ground
- Engine shutoff solenoid
- F4 i-3 fuse 9 15a f3
- Fuel sol high
- Fuel sol low
- Fuel sole- noid
- Fuel solenoid driver (top left of engine)
- G6 ecm-1 fuse 12 20a g5
- Haz fuse 11 15a
- Hazard flasher (inner left side of main support bracket)
- High
- Hot at all times
- Hot in run
- Hot in run and start
- I/p fuse block
- Ignition timing stepper motor (part of fuel injection pump)
- J6 trans fuse 17 10a j5
- Low
- Optical fuel temperature sensor (part of fuel injection pump)
- Pnk
- Red
- S116
- S121
- S124 (eng harn, 16 cm from left bulkhead grommet toward pcm)
- S200 (i/p harn, 8 cm from breakout for steering column)
- Stop/ g7
- Tcc/ stoplamp switch
6.5L (VIN F), Engine Performance Wiring Diagrams, Motor Home Chassis (3 of 4) for Chevrolet Forward Control P12 1998
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List of elements for 6.5L (VIN F), Engine Performance Wiring Diagrams, Motor Home Chassis (3 of 4) for Chevrolet Forward Control P12 1998:
- (17 cm from rear/lamp harness) g415
- (18 cm from breakout for left glow plugs) g112
- (18 cm from breakout for left glow plugs) g112
- 87a
- A/c compressor clutch relay (right side of driver's island)
- A/c high pressure cut-off switch (on rear of the a/c compressor)
- Ecm-b fuse 6 20a
- Eng bat fuse 10 15a
- Fuel lift pump (inside right frame rail, ahead of fuel tank)
- Fuel pump prime connector
- Fuel pump relay (in underhood fuse/relay center)
- Fuel pump switch and engine oil pressure gauge switch (left rear of engine)
- G114 (rear of left cyl head)
- Gauges fuse 8 20a
- Hot at all times
- Hot in run and start
- I/p fuse block
- Instrument cluster
- Malfunction indicator lamp (mil)
- Nca
- Oil press gauge
- Pnk
- Red
- S114
- S115
- S126
- S132
- S140 (eng harn, 35 cm from pcm conns, toward left firewall grommet)
- S141
- S143
- S154
- S168
- S400
- Service throttle soon indicator
- Speed meter
- Tan
- Wait to start indicator
- Water in fuel indicator
- Water in-fuel indicator sensor (part of fuel/water separator (filter) rear of intake manifold)
- Water in-fuel input
6.5L (VIN F), Engine Performance Wiring Diagrams, Motor Home Chassis (4 of 4) for Chevrolet Forward Control P12 1998
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List of elements for 6.5L (VIN F), Engine Performance Wiring Diagrams, Motor Home Chassis (4 of 4) for Chevrolet Forward Control P12 1998:
- "serv throttle soon" ind
- (dlc) (partial) (below dash, near steering column)
- (eng harn, 21 cm from breakout for generator) s144
- (eng harn, 7 cm from main harn in breakout for glowplugs) s145
- A/c enable
- Antilock brakes system
- App 2 5 volt ref
- Battery
- Breakout) s200
- C10
- C11
- C12
- C13
- C14
- C15
- C16
- D10
- D11
- D12
- D13
- D14
- D15
- D16
- Data link connector
- Eng-1 h6
- Eso ctrl
- Eso solenoid ctlr
- Fuel heater (top rear of engine)
- Fuel inject ctrl
- Fuse 15 20a
- Fusible link
- Fusible links
- G114 (left rear of engine block)
- G202 (left side of dash)
- Glow plug 1
- Glow plug 2
- Glow plug 3
- Glow plug 4
- Glow plug 5
- Glow plug 6
- Glow plug 7
- Glow plug 8
- Glow plug out
- Glow plug relay (top rear of intake manifold)
- Ground
- Hot at all times
- Hot in run and start
- I/p fuse block
- Ignition
- Mil ind ctrl
- Nca
- Pnk
- Powertrain control module (pcm) (left side of driver's island)
- Red
- Relay ctrl
- S128
- S135
- S163 (eng harn, 21 cm from left fire- wall grommet toward pcm)
- S166
- S203
- Serial data sig
- Shift sol 1-2 input
- Shift sol 2-3 input
- Tcc pwm sol vlv ctrl
- Wait to start ind ctrl
- Wastegate sol ctrl
- Wastegate solenoid
6.5L (VIN Y), Engine Performance Wiring Diagrams, Commercial Chassis - Electronic (1 of 4) for Chevrolet Forward Control P12 1998
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List of elements for 6.5L (VIN Y), Engine Performance Wiring Diagrams, Commercial Chassis - Electronic (1 of 4) for Chevrolet Forward Control P12 1998:
- (a/t) (rear of left cylinder head)
- (center rear of intake manifold) manifold absolute pressure sensor
- (eng harn, 4cm from breakout to glowplug controller)
- (eng harn, at battery junction block)
- (eng harn, near left bulkhead grommet)
- (front of engine, in air intake) intake air temperature sensor
- (left front side of left cyl head) engine coolant temperature sensor
- (lower left front of engine) crankshaft position sensor
- (m/t) (on generator bracket)
- 12v
- 3-2 shift sol
- 5v ref volt
- A/c request sig
- A/t input speed sensor (left side of transmission)
- A10
- A11
- A12
- Air conditioning
- App no.1 gnd
- App no.1 ref volt
- App no.1 sig
- App no.2 gnd
- App no.2 sig
- App no.3 gnd
- App no.3 ref volt
- App no.3 sig
- Automatic transmission (a/t)
- B10
- B11
- B12
- Brake sw in
- Brake switch input
- C10
- C11
- C12
- C13
- C14
- C15
- C16
- Cam posit sens sig rtn
- Camshaft posit sens
- Closure gnd
- D10
- D11
- D12
- D13
- D14
- D15
- D16
- Ebcm
- Ect temp sens in
- Electronic brake control module (below radiator, on crossmember)
- Engine crank sens input
- Force motor
- Force mtr hi
- Force mtr low
- Fuel pump input
- Fuel pump rly ctrl
- Fuel sol closure (5v sig)
- Fuel temp sens (5v sig)
- G114
- Glow plug "wait" lp out
- Glow plug relay
- Ground
- Intake air temp sens
- Map sensor
- Pcs low
- Pnk
- Powertrain control module (pcm) (left side of driver's island)
- Range mode sel a
- Range mode sel b
- Range mode sel c
- Range mode selector
- Red
- S119
- S143
- S160
- S162
- Second vss sig
- Sensor gnd
- Shift sol a
- Shift sol b
- Solid state
- Speed sensor hi
- Speed sensor lo
- Tan
- Timing stepper mtr (high)
- Timing stepper mtr (low)
- Transmission speed input
- Transmission temp input
- Transmission temperature sensor
- Vehicle speed sensor (left rear of transmission)
- Vehicle speed sensor buffer (on driver's island support above accelerator pedal)
- Vss hi
- Vss lo
- Vss rtn
- Vss sig
6.5L (VIN Y), Engine Performance Wiring Diagrams, Commercial Chassis - Electronic (2 of 4) for Chevrolet Forward Control P12 1998
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List of elements for 6.5L (VIN Y), Engine Performance Wiring Diagrams, Commercial Chassis - Electronic (2 of 4) for Chevrolet Forward Control P12 1998:
- Accelerator pedal position module (attached to accelerator pedal)
- App 1 sensor
- App 2 sensor
- App 3 sensor
- Brake transmission shift interlock (btsi) relay (mounted on top of support bracket at driver's island)
- Engine shutoff solenoid
- F4 i-3 fuse 9 15a f3
- Fuel sole- noid
- Fuel solenoid driver
- Fuel temp.
- G6 ecm-1 fuse 12 20a g5
- Haz fuse 11 15a
- Hazard lamps flasher (behind left side of dash, above steering column)
- High
- Hot in run
- Hot in run or start
- I/p fuse block (behind dash panel, body builder installed)
- Injection pump (top front of engine)
- J6 trans fuse 17 10a j5
- Low
- Optical 3 temperature sensor
- Pnk
- Red
- S108
- S116
- S124 (eng harn, 13cm from breakout to a/c cutoff switch)
- S200 (dash side of engine harn, 15cm from bulkhead grommet)
- Stop lamps & torque converter brake switch (opens w/brake pedal depressed) (at rear of brake pedal support bracket)
- Stop- g7
- Stoplamp switch (at rear of brake pedal support bracket)
- Timing stepper motor
6.5L (VIN Y), Engine Performance Wiring Diagrams, Commercial Chassis - Electronic (3 of 4) for Chevrolet Forward Control P12 1998
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List of elements for 6.5L (VIN Y), Engine Performance Wiring Diagrams, Commercial Chassis - Electronic (3 of 4) for Chevrolet Forward Control P12 1998:
- (a/t) (rear of left cylinder head)
- (m/t) (on generator bracket)
- (tail & stoplamp extension harn, at crossmember in front of fuel tank) g415
- 87a
- Ecm- bat fuse 6 20a
- Fuel lift pump (inside left frame rail, below driver's door)
- Fuel pump oil pressure indicator switch (left rear of engine)
- Fuel pump relay (under battery junction box)
- G114
- Gauges fuse 8 20a
- Hot at all times
- Hot in run or start
- I/p fuse block (behind dash panel, body builder installed)
- In line to fuel pump prime (plant use)
- Instrument cluster
- Oil press gauge
- Pnk
- Red
- S118
- S170
- S171 (eng harn, 50cm from breakout to elctronic brake control module)
- S207
- S406
- Service engine soon indicator
- Service throttle soon indicator
- Speed meter
- Tan
- Wait to start "glow plugs" indicator
- Water in fuel indicator
6.5L (VIN Y), Engine Performance Wiring Diagrams, Commercial Chassis - Electronic (4 of 4) for Chevrolet Forward Control P12 1998
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List of elements for 6.5L (VIN Y), Engine Performance Wiring Diagrams, Commercial Chassis - Electronic (4 of 4) for Chevrolet Forward Control P12 1998:
- "serv eng soon" ind
- "serv throttle soon" ind
- (a/t) (rear of left cylinder head)
- (at fuel filter assembly) fuel heater
- (eng harn, 21cm from breakout to generator) s144
- (eng harn, 21cm from breakout to generator) s145
- (left rear of engine near firewall) glow plug control module
- (m/t) (on generator bracket)
- (part of fuel/water seperator (filter), rear of intake manifold) water in fuel indicator sensor
- 12v battery (fused)
- 12v battery fused
- 3/2 ctrl out
- A/c enable
- Air conditioning
- App no.2 ref voltage
- C10
- C11
- C12
- C13
- C14
- C15
- C16
- D10
- D11
- D12
- D13
- D14
- D15
- D16
- Data link connector (below dash, near steering column)
- Electronic brake control module (below radiator, on first crossmember)
- Eng-1 h6
- Engine shutoff sol out
- Fuel sol module (5 vref)
- Fuel sol module feed
- Fuse 15 20a
- Fusible links
- G114
- Hot at all times
- Hot in run or start
- I/p fuse block (behind dash panel, body builder installed)
- Ignition
- Left bank glow banks
- Nca
- Pcm gnd
- Pnk
- Powertrain control module (pcm) (left side of driver's island)
- Red
- Right bank glow banks
- S116
- S118
- S143
- S150 (dash harn, near steering column upper support)
- S163 (eng harn, 21cm from breakout to left bulkhead grommet)
- Serial data sig
- Shift sol a input
- Shift sol b input
6.5L (VIN Y), Engine Performance Wiring Diagrams, Commercial Chassis - Mechanical (1 of 3) for Chevrolet Forward Control P12 1998
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List of elements for 6.5L (VIN Y), Engine Performance Wiring Diagrams, Commercial Chassis - Mechanical (1 of 3) for Chevrolet Forward Control P12 1998:
- (eng harn, approx 6cm from breakout to glowplug control switch)
- (left side of trans) a/t input speeed sensor
- (rear of left cylinder head) g114
- 1-2 shift sol ctrl
- 2-3 shift sol ctrl
- 5v ref
- A10
- A11
- A12
- A6 a8
- B10
- B11
- B12
- Baro press sens sig
- Barometric pressure (baro) sensor (top left rear of intake manifold)
- Battery feed
- Brake pedal sw in
- Brake/transmission shift interlock relay (on top of driver's island support bracket)
- C10
- C11
- C12
- C13
- C14
- C15
- C16
- D10
- D11
- D12
- D13
- D14
- D15
- D16
- Data link connector (partial) (below dash, near steering column)
- Ebcm
- Ecm-1 fuse 12 20a
- Ecm-bat fuse 6 20a
- Electronic brake control module (below radiator, on first crossmember)
- Eng speed sens in
- Engine speed sensor (top front of engine, in fuel injection pump)
- G114 (rear of left cylinder head)
- Ground
- Hot at all times
- Hot in run
- Hot in run or start
- I-3 fuse 9 15a
- I/p fuse block (behind dash panel) (body builder installed)
- Ign feed
- Pnk
- Press ctrl sol (hi)
- Press ctrl sol (lo)
- Range signal a
- Range signal b
- Range signal c
- Red
- Ref 5 volt
- Rtn
- S108
- S111 (eng harn, approx 10cm from breakout to generator jumper)
- S116
- S119
- S143
- S170
- S200 (dash side of eng harn, approx 15cm from left bulkhead grommet)
- Sensor return
- Serial data
- Service trans out
- Sig sensor
- Speed sensor
- Stoplmp sw in
- Tan
- Tcc pwm sol ctrl
- Tcm ground
- Tft sig
- Throttle position sensor (tps) (right side of fuel injection pump)
- Torque converter clutch (tcc) & stop lamps switch (opens w/brake pedal depressed) (right side of steering column upper support)
- Tp sens sig
- Transmission control module (tcm) (left interior bulkhead on top of relay bracket)
- Vehicle speed sensor (vss) (left side of trans)
- Vehicle speed sensor (vss) buffer (on driver's island support, above accelerator pedal)
- Vehicle speed sig
- Vss
- Vss input
- Vss out
- Vss rtn
- Vss sig
6.5L (VIN Y), Engine Performance Wiring Diagrams, Commercial Chassis - Mechanical (2 of 3) for Chevrolet Forward Control P12 1998
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List of elements for 6.5L (VIN Y), Engine Performance Wiring Diagrams, Commercial Chassis - Mechanical (2 of 3) for Chevrolet Forward Control P12 1998:
- "wait to start" glow plugs
- (a/t - rear of left cyl head) (m/t - on generator bracket)
- (taped to fuel pump relay breakout) fuel pump prime connector
- 1-2 shift solenoid
- 2-3 shift solenoid
- Automatic transmission (a/t) (rear of engine)
- Ecm-1 fuse 12 20a
- Ecm-bat fuse 6 20a
- Engine oil pressure gauge sensor (on top left rear of eng block)
- Fuel injection pump fuel shutoff solenoid (at fuel injection pump)
- Fuel pump motor
- Fuel pump relay (on engine firewall bracket, under battery junction block)
- G114
- G114 (rear of left cylinder head)
- Gauges fuse 8 20a
- Hot at all times
- Hot in run
- Hot in run or start
- I/p fuse block (behind dash panel) (body builder installed)
- Instrument cluster
- Oil gauge
- Orn
- Pnk
- Pressure control solenoid
- Red
- S108
- S118
- S143
- S170
- S171
- S207
- Service trans
- Speedo meter
- Tan
- Tcc pwm solenoid
- Trans fuse 17 10a
- Transmission fluid temperature (tft) sensor
- Transmission range (tr) pressure switch assembly
- Water in- fuel
6.5L (VIN Y), Engine Performance Wiring Diagrams, Commercial Chassis - Mechanical (3 of 3) for Chevrolet Forward Control P12 1998
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List of elements for 6.5L (VIN Y), Engine Performance Wiring Diagrams, Commercial Chassis - Mechanical (3 of 3) for Chevrolet Forward Control P12 1998:
- (a/t) (m/t) (on generator bracket) left cylinder head)
- (eng harn, 12cm from breakout to right glow plugs) s117
- (eng harn, near breakout to glow plug control sw) s122
- (rear of
- 10a
- A/t
- Acc
- Battery junction block (on top left rear of intake manifold)
- Clutch pedal position (cpp) switch (closed with clutch pedal depressed) (on top of clutch pedal support)
- Crank fuse (engine harness, right of steering column)
- Crk (start)
- D100 (engine harn, approx 13cm from breakout to a/c compressor high press cutoff sw)
- Eng-1 fuse 15 20a
- Fuel heater (at fuel filter assembly)
- Fuel injection pump cold advance solenoid (in fuel injection pump)
- Fuel injection pump cold advance solenoid/ engine coolant temperature switch (on rear of right cylinder head)
- G114
- G200 (left interior bulkhead, near relay bracket)
- Glow plug control switch (rear of left cylinder head)
- Glow plug ctrl
- Glow plug stud
- Glow plug tell tale relay (on relay bracket. left sdie of interior bulkhead)
- Ground
- Hot at all times
- Hot in run or start
- I/p fuse block (behind dash panel) (body builder installed)
- Idle speed control solenoid actuator (on front of fuel injection pump)
- Ign feed
- Ignition switch
- Ind lamp out
- Left bank glowplugs (on cylinder heads, below valve covers)
- Lock
- M/t
- Off
- On (run)
- Park/neutral position (pnp) & backup lamps switch (closed in park or neutral) (left side near middle of transmission)
- Pnk
- Red
- Right bank glowplugs (on cylinder heads, below valve covers)
- S stud
- S109 (eng harn, approx 33cm from left bulkhead grommet)
- S110
- S115
- S116
- S135
- S172 (eng harn)
- Starter feed
- Starter relay (on eng firewall relay bracket, under battery junction block)
- Starter solenoid (on starter, at lower right side of engine)
- Stud
- Water in-fuel sensor (part of fuel/water separator (filter) at rear of intake manifold)
7.4L
7.4L (VIN J), Engine Performance Wiring Diagrams, Motor Home Chassis (1 of 4) for Chevrolet Forward Control P12 1998
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List of elements for 7.4L (VIN J), Engine Performance Wiring Diagrams, Motor Home Chassis (1 of 4) for Chevrolet Forward Control P12 1998:
- (left rear side of transmission) a/t output speed sensor
- (on lower right front of engine, behind torsional damper) crankshaft position sensor
- (on throttle valve assembly) idle air control valve
- 1-2 shift sol ctrl
- 1x cmp sig
- 2-3 shift sol ctrl
- 4x ckp sig
- A pnk
- Anti- lock brakes system
- Camshaft position sensor (internal to distributor)
- Ckp low
- Cmp low
- Ect signal
- Egr posit input
- Fuel gauge
- Heated oxygen sensor (ho2s) bank 2 sensor 1 (on right exhaust pipe before catalytic converter)
- Ho2s high
- Ho2s low
- Iac a high
- Iac b high
- Iac high
- Iac low
- Iat signal
- Ign feed
- Injector 1 ctrl
- Injector 2 ctrl
- Injector 3 ctrl
- Injector 4 ctrl
- Injector 5 ctrl
- Injector 6 ctrl
- Injector 7 ctrl
- Injector 8 ctrl
- Ks signal
- Left knock sensor (on lower left side of engine)
- Maf signal
- Map signal
- Nca
- Pnk
- Pnk d
- Pwm tcc sol ctrl
- Right knock sensor (on lower right side of engine)
- S131 (eng harn, 13 cm from breakout for egr, toward map sensor)
- Sens rtn
- Sens sig
- Sensor rtn
- Sensor signal
- Tan
- Tan a
- Tft signal
- Tp signal
- Vehicle control module (vcm) (center front of engine compartment)
- Vss
- Vss low
- Vss signal
7.4L (VIN J), Engine Performance Wiring Diagrams, Motor Home Chassis (2 of 4) for Chevrolet Forward Control P12 1998
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List of elements for 7.4L (VIN J), Engine Performance Wiring Diagrams, Motor Home Chassis (2 of 4) for Chevrolet Forward Control P12 1998:
- Automatic transmission
- Ecm-1 fuse 12 20a
- Eng-1 fuse 15 20a
- Exhaust gas recirculation valve solenoid (left side of intake plenum)
- Fluid temperature sensor (internal)
- Force motor
- Fuel inj 1
- Fuel inj 2
- Fuel inj 3
- Fuel inj 4
- Fuel inj 5
- Fuel inj 6
- Fuel inj 7
- Fuel inj 8
- G117 (13 cm from breakout for ignition coil)
- Heated oxygen sensor (ho2s) bank 1 sensor 1 (on left exhaust pipe before catalytic converter)
- Heated oxygen sensor (ho2s) bank 1 sensor 2 (on left exhaust pipe after catalytic converter)
- Heated oxygen sensor (ho2s) bank 2 sensor 2 (on right exhaust pipe after catalytic converter)
- Hot in run and start
- I/p fuse block
- Ignition
- Intake air temp sensor (mounted in fresh air intake behind air filter box)
- Nca
- Pnk
- Pnk d
- Pnk e
- Pnk n pressure
- Pnk pnk
- Red
- Red p pressure
- S121
- S133
- S135
- S158
- S159
- Solenoid 1-2
- Solenoid 2-3
- Switch
- Tan
- Tan a
- Toward eng)
7.4L (VIN J), Engine Performance Wiring Diagrams, Motor Home Chassis (3 of 4) for Chevrolet Forward Control P12 1998
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List of elements for 7.4L (VIN J), Engine Performance Wiring Diagrams, Motor Home Chassis (3 of 4) for Chevrolet Forward Control P12 1998:
- (10 cm from breakout for generator) g120
- (17 cm from rear lamp harness) g415
- (eng harn, 20 cm from breakout for cruise control module, toward vcm)
- (eng harn, 4cm from breakout for cruise control module, toward relays)
- (eng harn, 7 cm from breakout for left front wheel speed sensor, toward eng) s127
- A/c compressor high pressure cut-off switch (on rear of a/c compressor)
- Eng-bat fuse 10 15a f1
- Engine coolant temperature sensor (on top front of engine)
- Fuel gauge
- Fuel pump and fuel tank sender (on top of fuel tank)
- Fuel pump/ oil pressure switch (on top left rear of engine)
- G120 (10 cm from breakout for generator)
- Gauges fuse 8 20a
- Hot at all times
- Hot in run and start
- I/p fuse block
- Instrument cluster
- Malfunction indicator lamp (mil) (service engine soon)
- Manifold absolute pressure (map) sensor (top center front of engine)
- Mass air flow sensor (right front of engine comp, on air intake assembly)
- Nca
- Oil press gauge
- Pnk
- Red
- S119 (eng harn, 4 cm from breakout for generator, toward cruise control module)
- S120
- S126
- S132
- S140
- S141
- S154
- S165
- S400
- Speed meter
- Tach
- Tan
- Throttle position sensor (on throttle body, top of engine)
- Trans fuse 17 10a
7.4L (VIN J), Engine Performance Wiring Diagrams, Motor Home Chassis (4 of 4) for Chevrolet Forward Control P12 1998
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List of elements for 7.4L (VIN J), Engine Performance Wiring Diagrams, Motor Home Chassis (4 of 4) for Chevrolet Forward Control P12 1998:
- (10 cm from breakout for generator) g120
- (i/p harn, 15 cm from breakout for abs harn) s202
- 87a
- A/c comp cyl sw
- A/c rec
- A/c relay
- A/c request signal
- Air conditioning system
- Anti-lock brakes system
- Automatic transmission input shaft speed sensor (left side of transmission)
- Aux elect cooling fan
- B +
- Battery feed
- Brake signal
- Brake/transmission shift interlock (btsi) relay (mounted on top of support bracket at driver's island)
- Check engine lp ctrl
- Cooling fans system
- Cruise control module (on radiator support bracket)
- Cruise ctrl engaged
- Cruise engaged sig
- Cylinder 1
- Cylinder 2
- Cylinder 3
- Cylinder 4
- Cylinder 5
- Cylinder 6
- Cylinder 7
- Cylinder 8
- Data link connector (dlc) (below dash, near steering column)
- Distributor
- Ecm-b fuse 6 20a
- Egr valve feed
- Egr vlv ctrl
- Egr/map 5v ref
- Elec spk timing ctrl signal
- Est ctrl
- Evaporative emission canister purge valve (top left center of engine, behind a/c compressor)
- Fuel level module
- Fuel pmp rly ctrl
- Fuel pump prime connector
- Fuel pump relay (left side of engine compt)
- G114 (left rear of engine block)
- G120 (engine) (10 cm from breakout for generator)
- G202 (below left side of dash)
- Ground
- High voltage coil wire
- Hot at all times
- Hot in run
- I-3 fuse 9 15a
- I/p fuse block
- Ic cntrl
- Ign feed
- Ignition coil (on bracket at rear of intake plenum)
- Ignition coil module (on bracket at rear of intake plenum)
- Input speed sens high
- Input speed sens low
- Pcs high
- Pcs low
- Pnk
- Pnk a
- Purge canister sol
- Range signal a
- Range signal b
- Range signal c
- Red
- S114
- S116
- S126
- S166
- S200 (eng harn, 45 cm from breakout for map sensor, toward firewall)
- S203
- Sens ground
- Sensor ground
- Serial data
- Spark plugs
- Speed sensor input
- Tcc stoplamp switch (opens w/brake depressed) (right side of steering column upper support)
- Tcc/stoplamp input
- Tp sig 5v ref
- Vehicle control module (vcm) (on center front of engine compartment)
- Vss output signal
EXTERIOR LIGHTS
Back-up Lamps Wiring Diagram, Commercial Chassis for Chevrolet Forward Control P12 1998
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List of elements for Back-up Lamps Wiring Diagram, Commercial Chassis for Chevrolet Forward Control P12 1998:
- (left side of transmission) backup lamps switch
- A/t
- Hot in run
- I/p fuse block
- M/t
- Park/neutral position (pnp) & backup lamp switch (left side of transmission)
- Provision for left backup lamp
- Provision for right backup lamp
- S403 (rear lamps harness, 65 or 120cm rearward of taillamps extension to rear lamps harness breakout)
- Turn b/u fuse 5 15a
- Turn signal flasher (i/p fuse block)
Back-up Lamps Wiring Diagram, Motorhome Chassis for Chevrolet Forward Control P12 1998
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List of elements for Back-up Lamps Wiring Diagram, Motorhome Chassis for Chevrolet Forward Control P12 1998:
- Hot in run
- I/p fuse block
- Park/neutral position (pnp) & backup lamp switch (left side of transmission)
- Provision for backup lamps (on left frame rail near rear lamp harness)
- Provision for rear mounted camera (near breakout for steering column harness)
- S134 (engine harn, near breakout for starter motor)
- Turn b/u fuse 5 15a
- Turn signal flasher (i/p fuse block)
Exterior Lamps Wiring Diagram, Commercial Chassis for Chevrolet Forward Control P12 1998
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List of elements for Exterior Lamps Wiring Diagram, Commercial Chassis for Chevrolet Forward Control P12 1998:
- (dash harness headlamp switch breakout, 8cm before i/p fuse block breakout) s208
- (forward lamps harn, 4cm from horn conn breakout) s101
- (rear lamps harness, 55 or 110cm from tail/ stoplamps extension harness to rear lamps harness, near left frame rail and fuel tank) s402
- Backup lamps circuit
- C205 provisions for marker lamps (near i/p fuse block)
- G114 (left rear of engine)
- Hazard
- Hazard lamps flasher (left inner bulkhead on relay bracket)
- Head
- Headlamps switch
- Hot at all times
- Hot in run
- I/p fuse block
- Instrument cluster
- Interior lamps system
- Left front park & turn signal (t/s) lamp
- Left front side marker lamp
- Left rear license lamps
- Left turn ind.
- Normal
- Off
- Park
- Provision for center high mounted stop lamp
- Provisions for left rear side marker lamp
- Provisions for left tail/stop & turn signal lamps
- Provisions for right rear side marker lamp
- Provisions for right tail/stop & turn signal lamps
- Right front park & turn signal (t/s) lamp
- Right front side marker lamp
- Right rear license lamps
- Right turn ind.
- S101 (forward lamps harn, 4cm from horn conn breakout)
- S104 (forward lamps harn, 15cm after right lamps breakout)
- S105 (forward lamps harn, 10cm before right lamps breakout)
- S218
- S404 (rear lamps harness, 5cm from right tail- lamps breakout)
- S405 (rear lamps harness, 5cm from left taillamps breakout)
- Stop
- Stop haz fuse 11 15a
- Tail
- Tail lamps fuse 7 20a
- Torque converter clutch & stop lamps switch (right side of steering column upper support)
- Turn
- Turn b/u fuse 5 15a
- Turn left
- Turn right
- Turn signal flasher
- Turn signal switch
Exterior Lamps Wiring Diagram, Motorhome Chassis for Chevrolet Forward Control P12 1998
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List of elements for Exterior Lamps Wiring Diagram, Motorhome Chassis for Chevrolet Forward Control P12 1998:
- (7.4l)
- (forward lamp harn, 5cm from left head- lamp breakout) s102
- (forward lamp harn, 5cm from right headlamp breakout) s106
- (right rear frame rail) g417
- Backup lamps circuit
- Cruise control system
- Engine controls system
- G114 (left rear of engine block)
- G119 (right front of engine)
- Hazard
- Hazard lamps flasher (inner left side of main support bracket)
- Head
- Headlamps switch
- Hot at all times
- Hot in run
- I/p fuse block
- Instrument cluster
- Interior lamps system
- Left front park & turn signal (t/s) lamp
- Left front side marker lamp
- Left rear license lamp
- Left rear side marker lamp
- Left turn indic
- Nca
- Normal
- Off
- Park
- Provision for center high mounted stop lamp
- Provisions for left tail, stop & turn signal (t/s) lamps
- Provisions for marker lamps
- Provisions for right tail, stop & turn signal (t/s) lamps
- Right front park & turn signal (t/s) lamp
- Right front side marker lamp
- Right rear license lamp
- Right rear side marker lamp
- Right turn indic
- S105 (forward lamp harn, 9cm from right headlamp breakout)
- S117 (l19 engine) (engine harness, 43cm from engine cooling fan notor harn breakout) (l29/l65 engine) (engine harness, 7cm from windshield wiper motor breakout)
- S126
- S152 (dash harness, 25cm from headlamp switch connector)
- S165
- S402 (rear lamp harness, rear of vehicle)
- S404 (rear lamp harness, rear of vehicle)
- S405 (rear lamp harness, rear of vehicle)
- S500
- Stop haz fuse 11 15a
- Tail lamps fuse 7 20a
- Torque converter clutch & stop lamps switch (brake pedal support bracket)
- Turn
- Turn b/u fuse 5 15a
- Turn left
- Turn right
- Turn signal flasher
- Turn signal switch
GROUND DISTRIBUTION
Ground Distribution Wiring Diagram, Commercial Chassis (1 of 2) for Chevrolet Forward Control P12 1998
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List of elements for Ground Distribution Wiring Diagram, Commercial Chassis (1 of 2) for Chevrolet Forward Control P12 1998:
- (body builder installed)
- (forward lamps harn, 4cm after first horn breakout)
- (i/p harn, 4cm before i/p fuse block breakout)
- 87a
- A/c compressor clutch coil
- A/c compressor refrigerant pressure switch
- A/c compressor relay
- A/t shift lock control relay
- A/t shift lock control solenoid
- A/t shift lock control solenoid relay
- Auxilary engine coolant fan motor
- Battery
- Braided strap
- Data link
- Daytime running lamps control module
- Daytime running lamps relay
- Diesel
- Electronic brake control module
- Engine block
- Engine coolant level switch
- G106 (behind left headlamp)
- G107 (behind right headlamp)
- G113 (left frame rail)
- G113 (left front frame rail)
- G117 (right rear of engine)
- G417 (right rear frame rail)
- Gasoline
- Glowplug telltale relay (mechanical)
- I/p convenience center
- I/p dimmer switch
- Inline to fuel pump sender
- Inline to fuel system
- Left headlamp (w/o drl)
- Left horn
- Provisions for left side marker lamp
- Right headlamp
- Right horn
- S103
- S110 (engine harn, 4cm from brake pressure differential breakout)
- S110 (engine harn, near left bulkhead connector)
- S168 (engine harn, 3.5cm from battery junction block breakout)
- S205
- S401 (rear lamps harn, left rear frame rail)
- S406 (chassis harn, near breakout to g417)
- Secondary battery (diesel only)
- Secondary high pressure switch
- Starter relay
Ground Distribution Wiring Diagram, Commercial Chassis (2 of 2) for Chevrolet Forward Control P12 1998
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List of elements for Ground Distribution Wiring Diagram, Commercial Chassis (2 of 2) for Chevrolet Forward Control P12 1998:
- (a/t)
- (engine harn, near throttle position sensor)
- (m/t)
- 5.7l
- A/c compressor high pressure cut off switch
- A/t
- A/t output speed sensor shield
- Brake pressure differential switch
- Data link
- Diesel
- Electronic brake control module
- Electronic ignition control module
- Firewall)
- Fuel heater
- Fuel pump relay
- Fuel pump relay (diesel)
- G114 (left rear of engine)
- G117 (left rear of engine)
- G119 (right front of engine)
- Gasoline
- Glowplug control relay
- Heated oxygen sensor bank 1 sensor 1
- Heated oxygen sensor bank 1 sensor 2
- Heated oxygen sensor bank 2 sensor 1
- Heated oxygen sensor bank 2 sensor 2
- Inline to fuel pump
- Instrument cluster
- M/t
- Mass air flow sensor
- Powertrain/ vehicle control module
- S118 (a/t)(engine harn, near glowplug controller breakout) (m/t)(engine harn, near starter motor breakout)
- S118 (engine harn, left rear of engine)
- S138
- S161 (ebcm harn, 15cm from right wheel speed sensor breakout)
- S218 (i/p harn, 6cm before i/p fuse block breakout)
- Starter relay
- Transmission control module (diesel)
- Vehicle speed sensor buffer (diesel)
- Vehicle speed sensor shield
- Water in fuel indicator sensor
Ground Distribution Wiring Diagram, Motor Home Chassis (1 of 2) for Chevrolet Forward Control P12 1998
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List of elements for Ground Distribution Wiring Diagram, Motor Home Chassis (1 of 2) for Chevrolet Forward Control P12 1998:
- (6.5l)
- (6.5l) (7.4l)
- (7.4l)
- (body builder installed)
- (i/p harn, near right headlamp breakout)
- 7.4l
- A/c compressor high pressure cutoff switch
- A/t output speed sensor shield
- Battery
- Braided strap
- Daytime running lamp relay no 2
- Electronic brake control module
- Engine block
- Fuel heater
- Fuel pump relay
- G111 (near battery)
- G112 (left side of engine)
- G113 (left frame rail)
- G113 (left front frame rail)
- G115 (near ignition coil)
- G119 (right front of engine)
- Glowplug controller
- Heated oxygen sensor bank 1 sensor 1
- Heated oxygen sensor bank 1 sensor 2
- Heated oxygen sensor bank 2 sensor 1
- Heated oxygen sensor bank 2 sensor 2
- Ignition control module
- Left headlamp
- Left headlamp inner
- Left headlamp outer
- Left horn
- Mass air flow sensor
- Park/ neutral position switch relay
- R100 (near a/c compressor clutch)
- Right headlamp
- Right headlamp inner
- Right headlamp outer
- Right horn
- S104
- S135 (7.5l) (engine harn, near o2 sensor breakout) (6.5) (eng harn, near glow plug controller breakout)
- S168 s126 (engine harn, near cruise control module breakout)
- Secondary battery (diesel only)
- Starter relay
- Stop lamp resistor
- Underhood fuse/relay center
- W/ dual headlights
- W/o drl
- W/o dual headlights
- Water in fuel indicator sensor
Ground Distribution Wiring Diagram, Motor Home Chassis (2 of 2) for Chevrolet Forward Control P12 1998
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List of elements for Ground Distribution Wiring Diagram, Motor Home Chassis (2 of 2) for Chevrolet Forward Control P12 1998:
- 6.5l diesel
- 7.4l
- 87a
- A/c compressor clutch coil
- A/c compressor high pressure cutoff switch
- A/c compressor refrigerant pressure switch
- A/t shift lock control solenoid
- A/t shift lock control solenoid relay
- Audio alarm
- Brake pressure differential switch
- Coolant fan motor
- Coolant level switch
- Cruise control module
- Data link
- Data link connector
- Daytime running lamps control module
- Daytime running lamps relay
- Electronic brake control module
- G114 (left rear of engine block)
- G116 (left side of firewall)
- G202 (left side of dash)
- G416 (left rear frame rail)
- G417 (right rear frame rail)
- I/p dimmer switch
- I/p fuse block
- Iniline to fuel pump and fuel sender (7.4l) inline to fuel sender (6.5l)
- Inline to fuel pump (6.5l)
- Inline to steering column harness
- Instrument cluster
- Left side marker lamp
- Park brake position switch
- Park brake position switch relay
- Park brake pressure valve solenoid
- Park brake pump motor
- Park brake pump relay
- Pull button park brake relay
- Pulse wiper control module
- Right side marker lamp
- S150 (i/p harn, near fuse panel)
- S165 (i/p harn, 25cm from breakout to instrument panel)
- S166 (engine harn, 5cm from breakout to abs harness)
- S167 (in abs harness)
- S203 (engine harn, near main wiring pass through at firewall)
- S203 (i/p harn, 4cm from windshield wiper motor breakout)
- S212 (i/p harn, 20cm before i/p fuse block breakout)
- S400 (in rear fuel sender harness)
- Secondary high pressure switch
- Vechile control module (7.4l) powertrain control module (6.5l)
- Vehicle speed sensor buffer
HEADLIGHTS
Headlight Wiring Diagram, Commercial Chassis with DRL for Chevrolet Forward Control P12 1998
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List of elements for Headlight Wiring Diagram, Commercial Chassis with DRL for Chevrolet Forward Control P12 1998:
- (left rear of engine) g114
- Acc
- Bulb test
- Daytime running lamps control module (attached to i/p harness at steering column)
- Daytime running lamps relay (left interior bulkhead, on relay bracket)
- Diode network (15cm from i/p fuse block breakout)
- Drl indicator
- Fog lamps
- G107 (behind right headlamp)
- G107 behind right headlamp)
- Gauges fuse 8 20a
- Ground
- Head
- Headlamp dimmer switch
- Headlamps switch
- Hi beam indicator
- Hi bm feed
- Hi bm indicator
- Hot at all times
- Hot in run or start
- I/p fuse block
- Ignition
- Ignition switch
- Instrument cluster
- Lamp feed
- Left head- lamp
- Lock
- Off
- Park
- Park brake in
- Park brake indicator switch (on park brake)
- Pnk
- Provision for fog lamps
- Red
- Relay out
- Right head- lamp
- Run
- S103
- S143
- S205
- S207
- S216 (i/p harn, approx 24cm from i/p fuse block breakout)
- Start
- Tan
Headlight Wiring Diagram, Commercial Chassis without DRL for Chevrolet Forward Control P12 1998
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List of elements for Headlight Wiring Diagram, Commercial Chassis without DRL for Chevrolet Forward Control P12 1998:
- G114 (left rear of engine)
- Gio7 (behind right headlamp)
- Head
- Headlamp
- Headlamps dimmer switch
- Headlamps switch
- Hi beam indicator
- Hot at all times
- Instrument cluster
- Left hi headlamp
- Off
- Park
- Red
- Right lo
- S150
- S206
- S218
- Tan
Headlight Wiring Diagram, Motor Home Chassis with Dual Headlamps with DRL for Chevrolet Forward Control P12 1998
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List of elements for Headlight Wiring Diagram, Motor Home Chassis with Dual Headlamps with DRL for Chevrolet Forward Control P12 1998:
- (body builder installed)
- (forward lamps harn, 12cm to breakout for left headlamp) s101
- (left rear of engine block) g114
- (provision for fog lamps)
- Acc
- Bulb test
- Daytime running lamps module (attached to i/p harness at steering column)
- Daytime running lamps relay (on main support bracket at driver's island)
- Daytime running lamps relay 2
- Diode network
- Drl indicator
- Fog lamps
- G202 (left side of dash)
- Gauges fuse 20a
- Ground
- Head
- Head- lamp dimmer switch
- Headlamps switch
- Hi beam indicator
- Hi bm feed
- Hi bm indicator
- Hot at all times
- Hot in run or start
- I/p fuse block
- Ignition
- Ignition switch
- Instrument cluster
- Instrument cluster system
- Lamp feed
- Left head- lamp
- Left high beam head- lamp
- Lock
- Off
- Park
- Park brake in
- Park brake indicator switch (on park brake)
- Pnk
- Red
- Relay out
- Right head- lamp
- Right high beam head- lamp
- Run
- S104
- S150
- S151 (i/p harn, 5cm from breakout for headlamp switch)
- S154
- S156
- S162 (i/p harn, 70cm from i/p fuse block)
- S165
- Start
- Tan
Headlight Wiring Diagram, Motor Home Chassis with Dual Headlamps without DRL for Chevrolet Forward Control P12 1998
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List of elements for Headlight Wiring Diagram, Motor Home Chassis with Dual Headlamps without DRL for Chevrolet Forward Control P12 1998:
- (body builder installed)
- (forward lamp harn, 12cm to breakout for left headlamp)
- G114 (left rear of engine block)
- Head
- Head- lamp
- Headlamps dimmer switch
- Headlamps switch
- Hi beam indicator
- Hot at all times
- Instrument cluster
- Left hi head- lamp
- Left high beam head- lamp
- Off
- Park
- Red
- Right high beam head- lamp
- Right lo
- S104
- S156
- S165
- Tan
Headlight Wiring Diagram, Motor Home Chassis with Single Headlamps with DRL for Chevrolet Forward Control P12 1998
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List of elements for Headlight Wiring Diagram, Motor Home Chassis with Single Headlamps with DRL for Chevrolet Forward Control P12 1998:
- (body builder installed)
- (left rear of engine) g114
- (provision for fog lamps)
- Acc
- Bulb test
- Daytime running lamps module (attached to i/p harness at steering column)
- Daytime running lamps relay (on main support bracket at driver's island)
- Diode network
- Drl indicator
- Fog lamps
- G202 (left side of dash)
- Gauges fuse 20a
- Ground
- Head
- Head- lamp dimmer switch
- Headlamps switch
- Hi beam indicator
- Hi bm feed
- Hi bm indicator
- Hot at all times
- Hot in run or start
- I/p fuse block
- Ignition
- Ignition switch
- Instrument cluster
- Instrument cluster system
- Lamp feed
- Left head- lamp
- Lock
- Off
- Park
- Park brake in
- Park brake indicator switch (on park brake)
- Pnk
- Red
- Relay out
- Right head- lamp
- Run
- S104
- S150
- S151 (i/p harn, 5cm from breakout for headlamp sw)
- S154
- S162 (i/p harn, 70cm from i/p fuse block)
- S218
- Start
- Tan
Headlight Wiring Diagram, Motor Home Chassis with Single Headlamps without DRL for Chevrolet Forward Control P12 1998
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List of elements for Headlight Wiring Diagram, Motor Home Chassis with Single Headlamps without DRL for Chevrolet Forward Control P12 1998:
- (body builder installed)
- G114 (left rear of engine block)
- Head
- Headlamp
- Headlamps dimmer switch
- Headlamps switch
- Hi beam indicator
- Hot at all times
- Instrument cluster
- Left hi headlamp
- Off
- Park
- Red
- Right lo
- S104
- S156
- S165
- Tan
HORN
Horn Wiring Diagram, Commercial Chassis for Chevrolet Forward Control P12 1998
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List of elements for Horn Wiring Diagram, Commercial Chassis for Chevrolet Forward Control P12 1998:
- (1997) s103 (1998) s150
- (forward lamp harness, 11 cm from right horn breakout)
- (left interior bulkhead)
- (left interior bulkhead) (body builder installed) g202
- C 1995 vftc
- G106 (body builder installed) (left lamps breakout)
- G107 (body builder installed) (right lamps breakout)
- Horn relay
- Horn switch
- Horn/dm fuse 20a
- Hot at all times
- I/p fuse block
- Left horn (low tone a-note) (body builder installed)
- Right horn (high tone f-note) (body builder installed)
- S100
- S204
- S205
- Steering wheel
Horn Wiring Diagram, Motor Home Chassis for Chevrolet Forward Control P12 1998
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List of elements for Horn Wiring Diagram, Motor Home Chassis for Chevrolet Forward Control P12 1998:
- (body builder installed)
- (forward lamp harness, 27 cm from left headlamp breakout)
- (i/p harness, near bulkhead connector)
- Body builder connector (partial)
- C 1995 vftc
- C203
- Horn relay (on driver's island)
- Horn switch
- Horn/dm fuse 20a
- Hot at all times
- I/p fuse block
- Left horn (body builder installed)
- Right horn (body builder installed)
- S100
- S104
- S153
- S204
- Steering wheel
INSTRUMENT CLUSTER
Instrument Cluster Wiring Diagram, Commercial Chassis for Chevrolet Forward Control P12 1998
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List of elements for Instrument Cluster Wiring Diagram, Commercial Chassis for Chevrolet Forward Control P12 1998:
- (4.3/5.7l: on left side of engine compt) (7.4l: on center front of engine compt) vehicle control module
- (abs harn, 11cm from abs ground)
- (body builder ground)
- (dash harn, 10cm from i/p fuse block) s214
- (dash harn, 24cm from i/p fuse block) s216
- (not used)
- (on power steering gear outlet hose fitting) p/b booster pump pressure switch
- (on top left rear of engine) (6.5l diesel) engine oil pressure gauge sensor
- (power steering gear outlet hose fitting) p/b booster fluid flow ind/alarm switch
- Abs ind
- Accy
- Anti-lock brakes system
- Brake ind
- Bulb test
- Check gauges ind
- Coolant temperature gauge
- Diesel
- Diode network (dash harn, 15cm from i/p fuse block)
- Drl ind
- Drl module (behind dash, above steering column)
- Ecm 1 fuse 12 20a
- Electronic brake control module (ebcm) (below radiator, on first crossmember)
- Eng 1 fuse 15 20a
- Engine controls or starting/charging system
- Engine controls system
- Engine coolant level switch (on lower left end of radiator surge tank)
- Engine coolant temperature gauge sensor (4.3l: on left rear side of left cylinder head) (5.7l: on left cylinder head, between two front spark plugs) (6.5l vin f: on left front of engine, behind p/s pump) (6.5l vin y: on left front of left cylinder head) (7.4l: on front center of engine coolant intake)
- Exterior lights system
- Fuel gauge
- Fuel pump switch & engine oil pressure gauge sensor (gasoline) (on engine block, top rear, near distributor)
- Fuel sender (on top of fuel tank)
- G114 (left rear of engine)
- Gas
- Gauges fuse 8 20a
- Headlights system
- Headlights system
- Hi beam ind
- Hot in run or start
- I/p fuse block (body builder installed)
- Ignition switch
- Illumination
- Inline connector fuse block (body builder connection)
- Instrument cluster
- Interior lights system
- Left turn ind
- Lock
- Low coolant ind
- Nca
- Off
- Oil pressure gauge
- P/b booster fluid flow alarm (taped to dash harn at breakout to dash fuse block & headlamps switch)
- P/b booster fluid flow ind/alarm delay module (taped to dash harn at breakout to dash fuse block & headlamps switch)
- Park brake indicator switch (body builder installed)
- Pnk
- Right turn ind
- Run
- S110
- S118
- S166
- S218
- S406
- Seat belt ind
- Service engine soon ind
- Service throttle soon ind
- Speedometer
- Start
- Tachometer
- Tan
- Trans ind
- Transmissions system
- Voltmeter
- W/ drl
- W/o drl
- Wait to start ind
- Warning systems
- Water in fuel ind
- Water-in fuel sensor (part of fuel/ water seperater (filter), rear of intake manifold)
Instrument Cluster Wiring Diagram, Motor Home Chassis (1 of 2) for Chevrolet Forward Control P12 1998
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List of elements for Instrument Cluster Wiring Diagram, Motor Home Chassis (1 of 2) for Chevrolet Forward Control P12 1998:
- (body builder ground)
- (on center front of engine compt) vehicle control module
- (on top left rear of engine) (6.5l diesel) engine oil pressure gauge sensor
- Abs ind
- Accy
- Anti-lock brakes system
- Auto park ind
- Brake ind
- Bulb test
- Check gauges ind
- Coolant temperature gauge
- Diesel
- Drl ind
- Ecm 1 fuse 12 20a
- Eng 1 fuse 15 20a
- Engine controls or starting/ charging system
- Engine controls system
- Engine coolant level switch (on lower left end of radiator surge tank)
- Engine coolant temperature gauge sensor (6.5l: on left front of engine) (7.4l: on front of engine coolant intake)
- Exterior lights system
- Fuel gauge
- Fuel pump switch & engine oil pressure gauge sensor (7.4l gas) (on engine block, top rear, behind distributor)
- Fuel sender (on top of fuel tank)
- G114 (left rear of engine block)
- G133 (on engine)
- Gas
- Gauges fuse 8 20a
- Headlights system
- Headlights system
- Hi beam ind
- Hot in run or start
- I/p fuse block (body builder installed)
- Ignition switch
- Illumination
- Instrument cluster
- Interior lights system
- Left turn ind
- Lock
- Low coolant ind
- Off
- Oil pressure gauge
- Pnk
- Right turn ind
- Run
- S135
- S165
- S203
- S400
- Seat belt ind
- Service engine soon ind
- Service throttle soon ind
- Speedometer
- Start
- Tachometer
- Tan
- Voltmeter
- Wait to start ind
- Warning systems
- Water in fuel ind
- Water-in fuel sensor (part of fuel/ water seperater (filter), rear of intake manifold)
Instrument Cluster Wiring Diagram, Motor Home Chassis (2 of 2) for Chevrolet Forward Control P12 1998
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List of elements for Instrument Cluster Wiring Diagram, Motor Home Chassis (2 of 2) for Chevrolet Forward Control P12 1998:
- (abs harn, 11cm from abs ground) s166
- (body builder connector)
- (body builder ground)
- (dash harn, 18cm from headlamp switch breakout) s162
- (not used)
- 87a
- Accy
- Bulb test
- Diode d300
- Diode d301
- Diode network (dash harn, 15cm from i/p fuse block)
- Drl module (behind dash, above steering column)
- Electronic brake control module (ebcm) (below radiator, on first crossmember)
- G115 (near ignition coil)
- Hot at all times
- Hot in run or start
- I/p fuse block (body builder installed)
- Ignition switch
- Lock
- Nca
- Off
- Park brake actuator position switch
- Park brake actuator position switch relay
- Park brake alarm
- Park brake indicator switch (body builder installed)
- Park brake pressure indicator switch (on right frame rail, behind trans)
- Park brake pressure valve solenoid
- Park brake pump motor (on right frame rail, behind trans)
- Park brake pump motor relay (on right frame rail, behind trans)
- Park brake pump motor switch (on right frame rail, behind trans)
- Park/neutral position switch relay
- Pnk
- Pull button park brake switch
- Pull button relay (on left side of driver's island)
- Red
- Run
- S135
- S149 (dash harn, near dash fuse block)
- S150
- S168
- S169
- S205 (dash harn, 76cm from fuse block)
- S363
- S364
- Shift interlock system
- Start
- W/ drl
- W/o drl
INTERIOR LIGHTS
Interior Light Wiring Diagram, Commercial Chassis for Chevrolet Forward Control P12 1998
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List of elements for Interior Light Wiring Diagram, Commercial Chassis for Chevrolet Forward Control P12 1998:
- (5)
- Breakout)
- C207
- Dash lamps input
- Dim
- Dome lamp switch
- Exterior lights system
- G107 (behind right headlamp)
- G114 (left rear of engine)
- Head
- Headlamps switch
- High
- Horn dim fuse 20a
- Hot at all times
- I/p fuse block
- I/p lamps dimmer switch
- Instr lps fuse 16 5a
- Instrument cluster
- Light switch
- Off
- Panel lamps switch
- Park
- Prndl lamp
- Provision for dome lamp
- Provision for marker lamps
- S168
- S204
- S205
- S218
- Seat belt alarm (bottom of i/p fuse block)
- Tail lps fuse 7 20a
Interior Light Wiring Diagram, Motor Home Chassis for Chevrolet Forward Control P12 1998
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List of elements for Interior Light Wiring Diagram, Motor Home Chassis for Chevrolet Forward Control P12 1998:
- (5)
- (i/p harn, 25 cm from head- lamp switch conn)
- (left side of dash)
- Dim
- Dome lamp switch
- Exterior lights system
- G114 (left rear of engine block)
- G202
- Head
- Headlamps switch
- High
- Horn dm fuse 3 20a
- Hot at all times
- I/p fuse block
- I/p lamps dimmer switch
- Instr lps fuse 16 5a
- Instrument cluster
- Lamp
- Light switch
- Off
- Panel lamps switch
- Park
- Prndl lamp
- Provision for dome b
- Provision for roof marker lamps
- S150
- S152
- S153
- S165
- Seat belt alarm (bottom of i/p fuse block)
- Tail lps fuse 7 20a
POWER DISTRIBUTION
Power Distribution Wiring Diagram, Commercial Chassis (1 of 4) for Chevrolet Forward Control P12 1998
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List of elements for Power Distribution Wiring Diagram, Commercial Chassis (1 of 4) for Chevrolet Forward Control P12 1998:
- (105a)
- (diesel a/t-engine harness, approx 19 cm from a/c compresssor clutch relay, others-engine harness, approx 11 cm from steering column connector breakout) s144
- (diesel-engine harness, 4-16 cm from starter motor breakout, gasoline-engine harness, 7 cm from generator jumper breakout) s112
- (i/p harness, approx 20 cm from fuse block breakout) s204
- (others)
- A/c compressor clutch relay
- A12
- Accessory junction block (left interior bulkhead, near relay bracket)
- Auxiliary engine coolant fan relay (diesel only)
- Batt bus
- Battery
- Battery junction block (left side of engine bulkhead)
- C13
- D13
- Data link connector
- Diesel
- Dome lamp (provisions for)
- Ecm- bat fuse 6 20a
- Electronic brake control module
- Eng- bat fuse 10 15a
- Engine pressure indicator sensor
- Fuel pump relay
- Fusible link (18 ga. rust)
- Fusible link 10 ga. rust
- Gas
- Generator
- Glow plug control module (diesel)
- Hazard lamp flasher
- Headlamps switch
- Horn relay
- Horn/ dm fuse 3 20a
- I/p fuse block (dash panel provided by body builder)
- Powertrain control module
- Pwr bus
- Pwr circuit breaker 30a
- Red
- Remote battery access terminal block (rear of right radiator core support panel)
- S134
- S206 (i/p harness, approx 12 cm before dash fuse block breakout)
- Seat belt/ lamps alarm module
- Secondary battery (diesel only)
- Starter relay
- Starter solenoid
- Stop- haz fuse 11 15a
- Stud
- Tail lps fuse 7 20a
- To ignition switch (diagram 2 of 4)
- Torque converter clutch & stoplamps switch
- Transmission control module (a/t only)
- Vehicle control module
- W/deluxe school bus option
Power Distribution Wiring Diagram, Commercial Chassis (2 of 4) for Chevrolet Forward Control P12 1998
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List of elements for Power Distribution Wiring Diagram, Commercial Chassis (2 of 4) for Chevrolet Forward Control P12 1998:
- (elec)
- (engine harness, approx 18 cm from right engine breakout)
- (engine harness, approx 5 cm from right glowplug breakout) s116
- (engine harness, approx 6 cm before mass air flow sensor breakout) s116
- (i/p harness, approx 15 cm after i/p fuse block breakout) s211
- (mech)
- A a6
- A b6
- A c6
- A d6
- A/t
- Acc
- Acc bus
- Acc radio fuse 4 10a
- Automatic transmission
- Auxiliary engine coolant fan relay
- Camshaft position sensor (4.3l)
- Camshaft position sensor (5.7l)
- Canister vent sensor (4.3l)
- Canister vent sensor (5.7l)
- Clutch pedal position switch
- Cold advance solenoid and engine coolant temperature switch
- Crank fuse 10a
- Crk (start)
- Diesel
- Eng-1 fuse 15 20a
- Evaporative emissions canister purge valve solenoid
- From fusible link (diagram 1 of 4)
- Fuel heater
- Gas
- Glow plug control switch
- I/p fuse block (dash panel provided by body builder)
- Ignition switch
- In-line fuse block (near right side of steering column)
- Left post oxygen sensor (5.7l/ 4.3l
- Left pre- heated oxygen sensor (4.3l/ 5.7l)
- Lock
- M/t
- Mass air flow sensor (4.3l/ 5.7l)
- Off
- On (run)
- Park/neutral position and backup lamps switch
- Pnk
- Provisions for windshield washer motor
- Red
- Right post oxygen sensor (5.7l)
- Right pre- heated oxygen sensor (4.3l/ 5.7l)
- S139
- To ecm-1 fuse (diagram 3 of 4 and diagram 4 of 4)
- To i/p fuse block: (diagram 4 of 4)
- Trans fuse 17 10a
- Water- in-fuel indicator sensor
- Windshield wiper & washer switch
- Wiper fuse 14 25a
Power Distribution Wiring Diagram, Commercial Chassis (3 of 4) for Chevrolet Forward Control P12 1998
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List of elements for Power Distribution Wiring Diagram, Commercial Chassis (3 of 4) for Chevrolet Forward Control P12 1998:
- (engine harness, 9cm from breakout to right oxygen sensor) s108
- (engine harness, approx 10 cm from breakout to right side of engine crossover harness) s108
- 4.3l vin w
- 5.7l vin r
- Crankshaft position sensor
- Ecm-1 fuse 12 20a
- Electronic ignition control module
- From eng-1 fuse (diagram 2 of 4)
- Fuel injector
- I/p fuse block (dash panel provided by body builder)
- Ignition coil
- Instrument cluster
- Pnk
- S145
- Vehicle control module
Power Distribution Wiring Diagram, Commercial Chassis (4 of 4) for Chevrolet Forward Control P12 1998
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List of elements for Power Distribution Wiring Diagram, Commercial Chassis (4 of 4) for Chevrolet Forward Control P12 1998:
- (engine harness, 8cm from vcm breakout) s133
- (engine harness, approx 19 cm pnk
- (engine harness, approx 26 cm from bulkhead grommet)
- (i/p harness, approx 40 cm before i/p fuse block breakout)
- 105a
- 1996 vftc c
- 6.5l engine
- A/c compressor clutch relay
- A/t
- Aux circuit breaker 13 30a
- Aux fuse 30a
- Back up lamps switch
- C11
- C12
- C16
- Daytime running lamp relay
- Daytime running lamps control module
- Diesel
- Ecm-1 fuse 12 20a
- Electronic brake control module
- Engine controls
- From breakout to steering column connector) s132
- From eng 1 fuse (diagram 2 of 4)
- From ignition switch (diagram 2 of 4)
- Fuel injection pump fuel shut-off solenoid
- Fuel injection pump shut-off solenoid
- Fuel pump relay (mech)
- Gas
- Gauges fuse 8 20a
- Generator
- Htr bus
- Htr fuse 1 25a
- I a4
- I b4
- I c4
- I-3 fuse 9 15a
- I/p fuse block (dash panel provided by body builder)
- Ign bus
- Instrument cluster
- Instrument lamps fuse 5a
- Interior lights system
- Interior lights system (i/p lamps dimmer switch)
- M/t
- Others
- Park/ neutral position and backup lamps switch
- Pnk
- Powertrain control module (elec)
- S108
- S207
- Seat belts lamp alarm module
- Torque converter clutch & stop lamps switch
- Transmission control module (a/t)
- Turn signal flasher
- Turn- b/u fuse 5 15a
- Vehicle control module (vcm)
- Vehicle speed sensor (a/t)
- Vehicle speed sensor (vss) buffer
Power Distribution Wiring Diagram, Motor Home Chassis (1 of 4) for Chevrolet Forward Control P12 1998
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List of elements for Power Distribution Wiring Diagram, Motor Home Chassis (1 of 4) for Chevrolet Forward Control P12 1998:
- (6.5l) (7.4l)
- (7.4l vin j-engine harness, 44 cm from breakout for left wheel speed sensor, 6.5l-engine harness, 20 cm from breakout of main harness)
- (i/p harn, 15cm from bulkhead connector)
- (i/p harness, 6 cm from breakout for headlamp switch)
- 6.5l vin f
- 7.4l
- 7.4l vin j
- A/c compressor relay
- Alternator
- Auxiliary fan control relay
- Battery
- Battery junction block (on forward left side of the bulkhead)
- Buss bar
- C d
- C13
- D13
- Data link connector
- Diesel
- Dome lamp
- Ecm- bat fuse 6 20a
- Electronic brake control module
- Eng- bat fuse 10 15a
- Fan control relay
- Fuel pump relay
- Fuel pump switch and oil pressure gauge
- Fusible link (10 ga. red)
- Fusible link (10 ga. rust)
- Glow plug controller
- Hazard flasher
- Headlamps switch
- Horn relay
- Horn/ dm fuse 3 20a
- I/p fuse block (mounted on the dash)
- Ignition switch (diagram 2 of 4)
- Powertrain control module
- Pwr circuit breaker 30a
- Red
- Red a
- S114
- S125 (7.4l-engine harness 5 cm from breakout for egr 6.5l-engine harness, 9 cm from breakout for generator)
- S141
- S153
- S156 (i/p harness, 35 cm from fuse panel)
- Seatbelts/ lamps alarm module
- Secondary battery (diesel only)
- Starter motor
- Starter relay
- Stop- haz lps fuse 11 15a
- Stoplamp switch
- Tail lamps fuse 7 20a
- Vehicle control module
Power Distribution Wiring Diagram, Motor Home Chassis (2 of 4) for Chevrolet Forward Control P12 1998
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List of elements for Power Distribution Wiring Diagram, Motor Home Chassis (2 of 4) for Chevrolet Forward Control P12 1998:
- (7.4l-eng harn, 58cm from main passthrough 6.5l-eng harn, 7.5cm from a/c harn breakout)
- (i/p harn, 25cm from fuse panel) s157
- (i/p harn, 25cm from instrument cluster breakout)
- (i/p harn, 54cm from fuse block)
- (i/p harn, 70cm from i/p fuse block) s162
- 6.5l vin f
- 7.4l vin j
- Acc
- Acc radio fuse 4 10a
- Automatic transmission
- Auxiliary fan control relay
- Camshaft position sensor
- Crank fuse 18 10a
- Daytime running lamp control module
- Diesel
- Diode network
- Eng-1 fuse 20a
- Engine coolant level switch
- Engine harness, 10 cm from breakout for ignition coil) s133
- Engine harness, 12cm from breakout for glow plug control) s128
- Evaporative emissions canister purge valve solenoid
- From fusible link (diagram 1 of 4)
- Fuel heater
- Glow plug control
- Heated oxygen sensor bank 1 sensor 1
- Heated oxygen sensor bank 1 sensor 2
- Heated oxygen sensor bank 2 sensor 1
- Heated oxygen sensor bank 2 sensor 2
- I/p fuse block (mounted on the dash)
- Ignition switch
- Instrument cluster
- Lock
- Mass air flow sensor
- Nca
- Off
- Park brake actuator position switch relay
- Park brake alarm
- Park brake switch
- Park low pressure switch
- Park/neutral position and backup lamps switch
- Pnk
- Pnk a
- Pnk a1
- Pull button park brake switch
- Pull button relay
- Red
- Run
- S161 (i/p harn, 18cm from fuse panel)
- S165
- Start
- To aux fuse (diagram 4 of 4)
- To gauges fuse (diagram 4 of 4)
- Trans fuse 17 10a
- Water in-fuel indicator sensor
- Wiper fuse 14 25a
- Wiper motor
Power Distribution Wiring Diagram, Motor Home Chassis (3 of 4) for Chevrolet Forward Control P12 1998
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List of elements for Power Distribution Wiring Diagram, Motor Home Chassis (3 of 4) for Chevrolet Forward Control P12 1998:
- (engine harness, 28 cm from breakout for injectors)
- (fuel injector harness, 7 cm from breakout for injector 5) s158
- (fuel injector harness, 7 cm from breakout for injector 5) s159
- 6.5l vin f
- 6.5l-engine harness, 16cm from bulkhead grommet) s121
- 7.4l vin j
- C11
- C12
- Crankshaft position sensor
- Ecm-1 fuse 20a
- Electronic ignition control module
- Engine shut-off solenoid
- From gauges fuse diagram 4 of 4)
- I/p fuse block (mounted on the dash)
- Ignition coil
- Injector
- Instrument cluster
- Pnk
- Powertrain control module
- S121
- Vehicle control module
- Vehicle speed sensor calibrator
Power Distribution Wiring Diagram, Motor Home Chassis (4 of 4) for Chevrolet Forward Control P12 1998
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List of elements for Power Distribution Wiring Diagram, Motor Home Chassis (4 of 4) for Chevrolet Forward Control P12 1998:
- (7.4l-engine harness, 52 cm from breakout for map sensor, 6.5l-engine harness, 33 cm from breakout for windshield wiper switch) s116
- (engine harness, 34cm from windshield wiper motor breakout) s115
- (i/p harness, 12 cm from breakout for headlamp switch) s154
- 1996 vftc c
- 6.5l vin f engine only
- 7.4l vin j engine
- 7.4l vin j engines
- A/c compressor relay
- Alternator
- Aux circuit breaker 30a
- Body builder circuit breaker
- Buss bar
- Canadian models
- Cruise control module
- Cruise control switch
- Daytime running lamps control module
- Daytime running lamps control relay
- Electronic brake control module
- From eng-1 fuse d (diagram 2 of 4)
- From ignition switch (diagram 2 of 4)
- Gauges fuse 8 20a
- Htr fuse 1 25a
- I-3 fuse 9 15a
- I/p fuse block (mounted on the dash)
- Instr- lps fuse 16 5a
- Instrument cluster
- Interior lights system
- Interior lights system (instrument panel dimmer switch)
- Park/neutral position & backup switch
- Pnk
- Seatbelts/ lamps alarm module
- Steering column harness
- Stoplamp torque converter clutch switch
- To ecm 1 fuse diagram 3 of 4)
- Turbo charger power valve solenoid
- Turn b/u fuse 5 15a
- Turn signal flasher
- Vehicle control module
SHIFT INTERLOCKS
Shift Interlock Wiring Diagram, Commercial Chassis for Chevrolet Forward Control P12 1998
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List of elements for Shift Interlock Wiring Diagram, Commercial Chassis for Chevrolet Forward Control P12 1998:
- Body builder installed
- Brake
- Brake/transmission shift interlock (btsi) relay (top of support bracket, at driver's island)
- Brake/transmission shift interlock (btsi) solenoid (on steering column)
- Diesel
- Electronic brake control module (below radiator on crossmember)
- Gasoline
- Hot in run
- I-3 fuse 15a
- I/p fuse block
- Ign
- Park/neutral position and backup lamps switch (left of trans)
- S110
- S133
- S168 (diesel only)
- S200 (dash side of eng harn, approx 17 cm from grommet left of bulkhead conn)
- Torque converter clutch and stop lamps switch (right side of steering column)
- Trans- mission control module (tcm) (left interior firewall)
- Turn b/u fuse 15a
- Turn signal flasher (on fuse block)
- Vehicle control module (vcm) (left side of eng compt)
Shift Interlock Wiring Diagram, Motor Home Chassis for Chevrolet Forward Control P12 1998
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List of elements for Shift Interlock Wiring Diagram, Motor Home Chassis for Chevrolet Forward Control P12 1998:
- (on crossmember, front of vehicle) electronic brake control module
- (on fuse block) turn signal flasher
- (rear of brake support bracket)
- Brake
- Brake/transmission shift interlock (btsi) relay (top of support bracket at driver's island))
- Brake/transmission shift interlock (btsi) solenoid (on steering column)
- Cruise control module
- Diesel
- G202 (left side of i/p)
- Gasoline
- Hot in run
- I-3 fuse 15a
- I/p fuse block
- Ign
- Park/ neutral position switch relay
- Park/neutral position & backup lamp switch (left of trans)
- Power- train control module (left of driver's island)
- S116
- S200 (i/p harn, 22 cm from grommet under i/p, toward steering column harn)
- S203
- S210
- Torque converter clutch & stop lamps switch
- Turn b/u fuse 15a
- Vehicle control module (top of radiator support)
STARTING/CHARGING
Charging Wiring Diagram for Chevrolet Forward Control P12 1998
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List of elements for Charging Wiring Diagram for Chevrolet Forward Control P12 1998:
- (124a) (145a)
- (commercial) s112 (motor home) s125
- (commercial-right rear of engine, motor home-near battery)
- (gasoline) (diesel)
- (motor home) (commercial)
- Bat
- Battery
- Fusible link (10 ga-rust)
- G117 (commercial) g111 (motor home)
- Gauges fuse 8 20a
- Generator
- Hot in run and start
- I/p fuse block
- Instrument cluster tach (diesel)
- P10 c
- Pnk
- Pnk c f
- Power distribution system
- Red
- S207 (commercial) s154 (motor home)
- Secondary battery (diesel)
- Starter solenoid
Starting Wiring Diagram for Chevrolet Forward Control P12 1998
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List of elements for Starting Wiring Diagram for Chevrolet Forward Control P12 1998:
- (body builder installed)
- (commercial)
- (commercial-rear of right cylinder head, motor home-near battery)
- (diesel only)
- (engine harness, approx 33 cm from bulkhead grommet)
- (motor home)
- 10a
- A/t
- Accy
- Battery
- Battery junction block
- Clutch pedal position switch (top of clutch pedal support)
- Engine controls system (commercial diesel only)
- Fusible link (10 ga-rust)
- G c1
- G111
- G117
- Hold- in coil
- Ignition switch
- In line crank fuse 18 (commercial) or i/p fuse block, crank fuse 18 (motor home)
- Lock
- M/t
- Off
- P or n
- Park/neutral position and backup lamps switch (left side of transmission)
- Pull- in coil
- Red
- Red b
- Run
- S109
- S110 (commercial diesel) s118 (commercial gasoline) s135 (motor home)
- S112 (commercial) s125 (motor home)
- Secondary battery (diesel)
- Start
- Starter motor
- Starter relay (relay center- gasoline, fuse/ relay center- vin f, under battery junction block-vin y)
- Starter solenoid
TRANSMISSION
4.3L
4.3L (VIN W), Transmission Wiring Diagram, 4L80-E for Chevrolet Forward Control P12 1998
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List of elements for 4.3L (VIN W), Transmission Wiring Diagram, 4L80-E for Chevrolet Forward Control P12 1998:
- (a/t output speed sensor)
- (mil)
- (twisted wire pair)
- 1-2 shift
- 1-2 shift sol
- 2-3 shift sol
- 2-3 shift solenoid
- 5v reference
- A/c compressor relay, generator & seat belt/ headlamps alarm module
- A/t input speed sensor (left side of transmission)
- A/t iss hi in
- A/t iss lo in
- Anti-lock brakes, cruise control & shift interlock systems
- Automatic transmission (4l80-e)
- Battery in
- Brake switch input
- Buss bar
- Data class ii
- Data link connector (partial) (below dash, near steering column)
- Ecm bat fuse 6 20a
- Ecm-1 fuse 12 20a
- Ect sens input
- Electronic brake control module & cruise control module
- Engine controls system
- Engine coolant temperture sensor (top front of engine)
- Fuel injectors (engine controls system)
- Fuel pump relay & switch
- G114 (rear of left clinder head)
- Gauges fuse 8 20a
- Hot at all times
- Hot in run
- Hot in run or start
- I-3 fuse 9 15a
- I/p fuse block
- Ignition in
- Instrument cluster
- Mil control
- Pcm ground
- Pcs sol hi out
- Pcs sol lo out
- Pnk
- Press ctrl
- Range signal "a"
- Range signal "b"
- Range signal "c"
- Red
- S108 s121
- S118
- S118 (7.4l) (eng harn, 19 cm from breakout for left front wheel sensor)
- S119 (engine harness, near ect sensor- 4.3l/5.7l) (engine harness, 4 cm from generator breakout- 7.4l)
- S133 s116
- S134 s114
- S135
- S135 (4.3l/5.7l) (eng harn, 8 cm from ect breakout)
- S143/s166
- S150/s202 (i/p harn)
- S200 (eng harn, 19 cm from firewall grommet towards ignition switch-4.3l/5.7l) (eng harn, 45 cm from map sensor breakout-7.4l)
- S207 s154
- Sensor ground
- Sensor return
- Service engine soon indicator
- Solenoid
- Tcc pwm
- Tcc pwm sol
- Tcc/ stop lamps switch
- Throttle position sensor (on throttle body)
- Tp sens input
- Trans fluid temp sensor
- Trans fuse 17 10a
- Trans range pressure switch assembly
- Trans temp sig in
- Vehicle control module (center front of engine compt)
- Vehicle speed sensor (left rear of transmission)
- Vss hi
- Vss lo
5.7L
5.7L (VIN R), Transmission Wiring Diagram, 4L80-E for Chevrolet Forward Control P12 1998
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List of elements for 5.7L (VIN R), Transmission Wiring Diagram, 4L80-E for Chevrolet Forward Control P12 1998:
- (a/t output speed sensor)
- (mil)
- (twisted wire pair)
- 1-2 shift
- 1-2 shift sol
- 2-3 shift sol
- 2-3 shift solenoid
- 5v reference
- A/c compressor relay, generator & seat belt/ headlamps alarm module
- A/t input speed sensor (left side of transmission)
- A/t iss hi in
- A/t iss lo in
- Anti-lock brakes, cruise control & shift interlock systems
- Automatic transmission (4l80-e)
- Battery in
- Brake switch input
- Buss bar
- Data class ii
- Data link connector (partial) (below dash, near steering column)
- Ecm bat fuse 6 20a
- Ecm-1 fuse 12 20a
- Ect sens input
- Electronic brake control module & cruise control module
- Engine controls system
- Engine coolant temperture sensor (top front of engine)
- Fuel injectors (engine controls system)
- Fuel pump relay & switch
- G114 (rear of left clinder head)
- Gauges fuse 8 20a
- Hot at all times
- Hot in run
- Hot in run or start
- I-3 fuse 9 15a
- I/p fuse block
- Ignition in
- Instrument cluster
- Mil control
- Pcm ground
- Pcs sol hi out
- Pcs sol lo out
- Pnk
- Press ctrl
- Range signal "a"
- Range signal "b"
- Range signal "c"
- Red
- S108 s121
- S118
- S118 (7.4l) (eng harn, 19 cm from breakout for left front wheel sensor)
- S119 (engine harness, near ect sensor- 4.3l/5.7l) (engine harness, 4 cm from generator breakout- 7.4l)
- S133 s116
- S134 s114
- S135
- S135 (4.3l/5.7l) (eng harn, 8 cm from ect breakout)
- S143/s166
- S150/s202 (i/p harn)
- S200 (eng harn, 19 cm from firewall grommet towards ignition switch-4.3l/5.7l) (eng harn, 45 cm from map sensor breakout-7.4l)
- S207 s154
- Sensor ground
- Sensor return
- Service engine soon indicator
- Solenoid
- Tcc pwm
- Tcc pwm sol
- Tcc/ stop lamps switch
- Throttle position sensor (on throttle body)
- Tp sens input
- Trans fluid temp sensor
- Trans fuse 17 10a
- Trans range pressure switch assembly
- Trans temp sig in
- Vehicle control module (center front of engine compt)
- Vehicle speed sensor (left rear of transmission)
- Vss hi
- Vss lo
6.5L
6.5L (VIN F), Transmission Wiring Diagram, 4L80-E for Chevrolet Forward Control P12 1998
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List of elements for 6.5L (VIN F), Transmission Wiring Diagram, 4L80-E for Chevrolet Forward Control P12 1998:
- (rear lamps provision connector)
- (twisted wire pair)
- 1-2 shift
- 1-2 shift sol
- 2-3 shift sol
- 2-3 shift solenoid
- 3-2 shift
- 3-2 shift sol
- A/c pnk
- A/t input speed sensor (left side of transmission)
- A/t iss sens hi in
- A/t iss sens lo in
- A12
- Accelerator pedal position module (attached to accelerator pedal)
- App 1 5v ref
- App 1 signal in
- App 2 5v ref
- App 2 signal in
- App 3 5v ref
- App 3 signal in
- Automatic transmission (4l80-e)
- B10
- B12
- Battery in
- Brake switch in
- Buss bar
- C11
- C12
- C13
- C14
- C15
- Class ii data
- Compressor relay, generator & turbo charger power valve
- D11
- D12
- D13
- Data link connector (partial) (below dash, near steering column)
- Ecm-1 fuse 12 20a
- Ecm-bat fuse 6 20a
- Ect sensor in
- Electronic brake control module
- Engine coolant temperature sensor (top front of engine)
- Fuel pump relay & fuel pump switch/engine oil pressure indicator sensor
- G114 (left rear of engine block)
- Gauges fuse 8 20a
- Hazard lamps flasher (above steering column)
- Hot at all times
- Hot in run
- Hot in run or start
- I-3 fuse 9 15a
- I/p fuse block
- Ignition in
- Indicator
- Instrument cluster
- Mil control
- Pcm ground
- Pcs sol hi out
- Pcs sol lo out
- Pnk
- Powertrain control module (left side of driver's island)
- Press ctrl solenoid
- Red
- S114
- S119 (engine harn, 4 cm from glow plug controller break-out)
- S121
- S124 (engine harn, 13 cm from a/c compressor hi-press cut-off switch breakout)
- S133
- S154
- S166
- S200 (eng harn, dash side near ignition switch)
- S202 (dash harness)
- Sensor ground
- Service engine soon (mil)
- Solenoid
- Stop-haz fuse 11 15a
- Stoplamp switch in
- Tft sensor in
- Torque converter clutch brake & stoplamp switch
- Trans fluid temp sensor
- Trans range "a"
- Trans range "b"
- Trans range "c"
- Trans range pressure switch assembly
- Transmission fuse 17 10a
- Vehicle speed sensor (left rear of transmission)
- Vehicle speed sensor calibrator & engine shutoff solenoid
- Vehicle speed sensor calibrator (above accelerator pedal)
- Vss hi in
- Vss lo in
- Vss out
6.5L (VIN Y), Transmission Wiring Diagram, with Electronic Engine Controls for Chevrolet Forward Control P12 1998
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List of elements for 6.5L (VIN Y), Transmission Wiring Diagram, with Electronic Engine Controls for Chevrolet Forward Control P12 1998:
- (rear lamps provision connector)
- (twisted wire pair)
- 1-2 shift
- 1-2 shift sol
- 2-3 shift sol
- 2-3 shift solenoid
- 3-2 shift
- 3-2 shift sol
- A/c compressor relay & generator
- A/t input speed sensor (left side of transmission)
- A/t iss sens hi in
- A/t iss sens lo in
- A12
- App 1 5v ref
- App 1 signal in
- App 2 5v ref
- App 2 signal in
- App 3 5v ref
- App 3 signal in
- Automatic transmission (4l80-e)
- B10
- B12
- Battery in
- Brake switch in
- Buss bar
- C11
- C12
- C13
- C14
- C15
- Class ii data
- D11
- D12
- D13
- Data link connector (partial) (below dash, near steering column)
- Ecm-1 fuse 12 20a
- Ecm-bat fuse 6 20a
- Ect sensor in
- Electronic accelerator pedal control (accelerator pedal position module) (attached to accelerator pedal)
- Electronic brake control module
- Engine coolant temperature sensor (top front of engine)
- Fuel pump relay & engine oil pressure indicator sensor
- G114 (rear of left cylinder head)
- Gauges fuse 8 20a
- Hazard lamps flasher (above steering column)
- Hot at all times
- Hot in run
- Hot in run or start
- I-3 fuse 9 15a
- I/p fuse block
- Ignition in
- Indicator
- Instrument cluster
- Mil control
- Pcm ground
- Pcs sol hi out
- Pcs sol lo out
- Pnk
- Powertrain control module (left side of driver's island)
- Press ctrl solenoid
- Red
- S108
- S119 (engine harn, 4 cm from glow plug controller break-out)
- S124 (engine harn, 13 cm from a/c compressor hi-press cut-off switch breakout)
- S133
- S143
- S150 (dash harness)
- S170
- S200 (eng harn, dash side near ignition switch)
- S207
- Sensor ground
- Service engine soon (mil)
- Solenoid
- Stop-haz fuse 11 15a
- Stoplamp switch in
- Tft sensor in
- Torque converter clutch & stoplamp switch
- Trans fluid temp sensor
- Trans range "a"
- Trans range "b"
- Trans range "c"
- Trans range pressure switch assembly
- Transmission fuse 17 10a
- Vehicle speed sensor (left rear of transmission)
- Vehicle speed sensor buffer
- Vehicle speed sensor buffer (above accelerator pedal)
- Vss hi in
- Vss lo in
- Vss out
6.5L (VIN Y), Transmission Wiring Diagram, without Electronic Engine Controls for Chevrolet Forward Control P12 1998
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List of elements for 6.5L (VIN Y), Transmission Wiring Diagram, without Electronic Engine Controls for Chevrolet Forward Control P12 1998:
- 1-2 shift sol
- 1-2 shift sol ctrl
- 2-3 shift sol
- 2-3 shift sol ctrl
- 5 volts ref
- 5v in
- 5v rtn
- A/t input speed sensor (left front side of transmission)
- A10
- A11
- A12
- Automatic transmission (4l80-e)
- B10
- B11
- B12
- Baro sensor input
- Barometric pressure sensor (top left rear of intake manifold)
- Battery feed
- Brake signal
- C10
- C11
- C12
- C13
- C14
- C15
- C16
- D10
- D11
- D12
- D13
- D14
- D15
- D16
- Data link connector (partial) (below dash, near steering column)
- Diagnostic test
- Drl module, drl relay & generator
- Ecm-1 fuse 12 20a
- Ecm-bat fuse 6 20a
- Electronic brake control module
- Engine oil pressure indicator sensor & fuel pump relay
- Engine speed sensor (in fuel injection pump)
- Engine speed signal
- Fuel injection pump shutoff solenoid, & fuel pump relay
- G114 (rear of left cylinder head)
- Gauges fuse 8 20a
- Hot at all times
- Hot in run
- Hot in run or start
- I-3 fuse 9 15a
- I/p fuse block
- Ign buss
- Ignition
- Input speed sens hi
- Input speed sens lo
- Instrument cluster
- Out
- Pcs hi
- Pcs lo
- Pnk
- Pnk n
- Pressure control solenoid
- Range mode selector
- Range signal a
- Range signal b
- Range signal c
- Red
- Red p
- S108
- S111 (engine harn, 10 cm from generator breakout)
- S119 (engine harn, 6 cm from glow plug switch breakout)
- S133
- S143
- S170
- S200 (engine harn, dash side near ignition switch)
- S207
- Sensor ground
- Serial data
- Service trans output
- Service transmission indicator
- Stop lamps & torque converter brake switch
- System ground
- Tan
- Tcc pwm control
- Tcc pwm sol
- Throttle position sensor (on fuel injection pump)
- Tp sensor input
- Trans fluid temp sig
- Trans fuse 17 10a
- Transmission control module (left interior firewall)
- Transmission temperature sensor
- Vehicle spd output
- Vehicle speed input
- Vehicle speed sensor (left rear of transmission)
- Vehicle speed sensor buffer
- Vss inputs
7.4L
7.4L (VIN J), Transmission Wiring Diagram, 4L80-E for Chevrolet Forward Control P12 1998
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List of elements for 7.4L (VIN J), Transmission Wiring Diagram, 4L80-E for Chevrolet Forward Control P12 1998:
- (a/t output speed sensor)
- (mil)
- (twisted wire pair)
- 1-2 shift
- 1-2 shift sol
- 2-3 shift sol
- 2-3 shift solenoid
- 5v reference
- A/c compressor relay, generator & seat belt/ headlamps alarm module
- A/t input speed sensor (left side of transmission)
- A/t iss hi in
- A/t iss lo in
- Anti-lock brakes, cruise control & shift interlock systems
- Automatic transmission (4l80-e)
- Battery in
- Brake switch input
- Buss bar
- Data class ii
- Data link connector (partial) (below dash, near steering column)
- Ecm bat fuse 6 20a
- Ecm-1 fuse 12 20a
- Ect sens input
- Electronic brake control module & cruise control module
- Engine controls system
- Engine coolant temperture sensor (top front of engine)
- Fuel injectors (engine controls system)
- Fuel pump relay & switch
- G114 (rear of left clinder head)
- Gauges fuse 8 20a
- Hot at all times
- Hot in run
- Hot in run or start
- I-3 fuse 9 15a
- I/p fuse block
- Ignition in
- Instrument cluster
- Mil control
- Pcm ground
- Pcs sol hi out
- Pcs sol lo out
- Pnk
- Press ctrl
- Range signal "a"
- Range signal "b"
- Range signal "c"
- Red
- S108 s121
- S118
- S118 (7.4l) (eng harn, 19 cm from breakout for left front wheel sensor)
- S119 (engine harness, near ect sensor- 4.3l/5.7l) (engine harness, 4 cm from generator breakout- 7.4l)
- S133 s116
- S134 s114
- S135
- S135 (4.3l/5.7l) (eng harn, 8 cm from ect breakout)
- S143/s166
- S150/s202 (i/p harn)
- S200 (eng harn, 19 cm from firewall grommet towards ignition switch-4.3l/5.7l) (eng harn, 45 cm from map sensor breakout-7.4l)
- S207 s154
- Sensor ground
- Sensor return
- Service engine soon indicator
- Solenoid
- Tcc pwm
- Tcc pwm sol
- Tcc/ stop lamps switch
- Throttle position sensor (on throttle body)
- Tp sens input
- Trans fluid temp sensor
- Trans fuse 17 10a
- Trans range pressure switch assembly
- Trans temp sig in
- Vehicle control module (center front of engine compt)
- Vehicle speed sensor (left rear of transmission)
- Vss hi
- Vss lo
WARNING SYSTEMS
Warning System Wiring Diagrams, Commercial Chassis for Chevrolet Forward Control P12 1998
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List of elements for Warning System Wiring Diagrams, Commercial Chassis for Chevrolet Forward Control P12 1998:
- G106 (behind left
- Gauges fuse 8 20a
- Ground
- Headlamp)
- Horn/dm fuse 3 20a
- Hot at all times
- Hot in run and start
- Hot w/ park or headlamps switch on
- I/p fuse block
- Instr lps fuse 16 5a
- Instrument cluster
- Lamp on input
- Pnk
- Power (battery)
- Power (ignition)
- S204
- S205
- S207
- S209
- Seat belt input
- Seat belt lamp output
- Seat belt/lamps alarm (at the bottom of the i/p fuse block)
Warning System Wiring Diagrams, Motor Home Chassis for Chevrolet Forward Control P12 1998
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List of elements for Warning System Wiring Diagrams, Motor Home Chassis for Chevrolet Forward Control P12 1998:
- G202 (left side of dash)
- Gauges fuse 8 20a
- Ground
- Headlamps switch on
- Horn/dm fuse 3 20a
- Hot at all times
- Hot in run and start
- Hot w/ park or
- I/p fuse block
- Instr lps fuse 16 5a
- Instrument cluster
- Lamp on input
- Pnk
- Power (battery)
- Power (ignition)
- S150
- S153
- S154
- S155
- Seatbelt switch
- Seatbelt tell tale
- Seatbelt/lamps alarm module (at the bottom of the i/p fuse block)
WIPER/WASHER
Provisions For Front Wiper/Washer Wiring Diagram, Commercial Chassis for Chevrolet Forward Control P12 1998
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List of elements for Provisions For Front Wiper/Washer Wiring Diagram, Commercial Chassis for Chevrolet Forward Control P12 1998:
- (1996-97) (1998-99)
- (first breakout from bulkhead connector)
- High
- Hot in accy or run
- I/p fuse block
- Low
- Mist
- Off
- Pnk
- Provisions for wiper/washer motor
- Wash
- Windshield wiper and washer switch
- Wiper fuse wiper fuse 14 25a
Provisions For Front Wiper/Washer Wiring Diagram, Motor Home Chassis for Chevrolet Forward Control P12 1998
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List of elements for Provisions For Front Wiper/Washer Wiring Diagram, Motor Home Chassis for Chevrolet Forward Control P12 1998:
- (1996-97,1999) s150 (1998) s203
- (1998-99) g202 (left side of dash)
- 1996-97
- 1998/
- Delay rheo- stat
- G202 (1996-97) (on driver's island)
- High
- Hot in accy and run
- I/p fuse block
- Low
- Mist
- Off
- Pnk
- Provisions for wiper/washer motor
- Pulse
- Pulse wiper control module (strapped to harness under driver's island)
- Wash
- Wiper fuse 14 25a
- Wiper fuse 25a
- Wiper/ washer switch