All Wiring Diagrams for Chevrolet Forward Control P30 1998

AIR CONDITIONING

4.3L

4.3L (VIN W), Air Conditioning Wiring Diagrams for Chevrolet Forward Control P30 1998

List of elements for 4.3L (VIN W), Air Conditioning Wiring Diagrams for Chevrolet Forward Control P30 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 P30 1998

List of elements for 5.7L (VIN R), Air Conditioning Wiring Diagrams for Chevrolet Forward Control P30 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 P30 1998

List of elements for 6.5L (VIN F), Air Conditioning Wiring Diagrams for Chevrolet Forward Control P30 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 P30 1998

List of elements for 6.5L (VIN Y), Air Conditioning Wiring Diagrams for Chevrolet Forward Control P30 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 P30 1998

List of elements for 7.4L (VIN J), Air Conditioning Wiring Diagrams for Chevrolet Forward Control P30 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 P30 1998

List of elements for Anti-lock Brake Wiring Diagrams, Commercial Chassis for Chevrolet Forward Control P30 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 P30 1998

List of elements for Anti-lock Brake Wiring Diagrams, Motor Home Chassis for Chevrolet Forward Control P30 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 P30 1998

List of elements for Computer Data Lines, Commercial Chassis for Chevrolet Forward Control P30 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 P30 1998

List of elements for Computer Data Lines, Motor Home Chassis for Chevrolet Forward Control P30 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 P30 1998

List of elements for 6.5L (VIN F), Cooling Fan Wiring Diagram for Chevrolet Forward Control P30 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 P30 1998

List of elements for 6.5L (VIN Y), Cooling Fan Wiring Diagram for Chevrolet Forward Control P30 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 P30 1998

List of elements for 7.4L (VIN J), Cooling Fan Wiring Diagram for Chevrolet Forward Control P30 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 P30 1998

List of elements for 6.5L (VIN F), Cruise Control Wiring Diagram, Motor Home Chassis for Chevrolet Forward Control P30 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 P30 1998

List of elements for 7.4L (VIN J), Cruise Control Wiring Diagram, Motor Home Chassis for Chevrolet Forward Control P30 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 P30 1998

List of elements for 4.3L (VIN W), Engine Performance Wiring Diagrams, Commercial Chassis (1 of 4) for Chevrolet Forward Control P30 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 P30 1998

List of elements for 4.3L (VIN W), Engine Performance Wiring Diagrams, Commercial Chassis (2 of 4) for Chevrolet Forward Control P30 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 P30 1998

List of elements for 4.3L (VIN W), Engine Performance Wiring Diagrams, Commercial Chassis (3 of 4) for Chevrolet Forward Control P30 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 P30 1998

List of elements for 4.3L (VIN W), Engine Performance Wiring Diagrams, Commercial Chassis (4 of 4) for Chevrolet Forward Control P30 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 P30 1998

List of elements for 5.7L (VIN R), Engine Performance Wiring Diagrams, Commercial Chassis (1 of 4) for Chevrolet Forward Control P30 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 P30 1998

List of elements for 5.7L (VIN R), Engine Performance Wiring Diagrams, Commercial Chassis (2 of 4) for Chevrolet Forward Control P30 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 P30 1998

List of elements for 5.7L (VIN R), Engine Performance Wiring Diagrams, Commercial Chassis (3 of 4) for Chevrolet Forward Control P30 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 P30 1998

List of elements for 5.7L (VIN R), Engine Performance Wiring Diagrams, Commercial Chassis (4 of 4) for Chevrolet Forward Control P30 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 P30 1998

List of elements for 6.5L (VIN F), Engine Performance Wiring Diagrams, Motor Home Chassis (1 of 4) for Chevrolet Forward Control P30 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 P30 1998

List of elements for 6.5L (VIN F), Engine Performance Wiring Diagrams, Motor Home Chassis (2 of 4) for Chevrolet Forward Control P30 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 P30 1998

List of elements for 6.5L (VIN F), Engine Performance Wiring Diagrams, Motor Home Chassis (3 of 4) for Chevrolet Forward Control P30 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 P30 1998

List of elements for 6.5L (VIN F), Engine Performance Wiring Diagrams, Motor Home Chassis (4 of 4) for Chevrolet Forward Control P30 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 P30 1998

List of elements for 6.5L (VIN Y), Engine Performance Wiring Diagrams, Commercial Chassis - Electronic (1 of 4) for Chevrolet Forward Control P30 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 P30 1998

List of elements for 6.5L (VIN Y), Engine Performance Wiring Diagrams, Commercial Chassis - Electronic (2 of 4) for Chevrolet Forward Control P30 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 P30 1998

List of elements for 6.5L (VIN Y), Engine Performance Wiring Diagrams, Commercial Chassis - Electronic (3 of 4) for Chevrolet Forward Control P30 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 P30 1998

List of elements for 6.5L (VIN Y), Engine Performance Wiring Diagrams, Commercial Chassis - Electronic (4 of 4) for Chevrolet Forward Control P30 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 P30 1998

List of elements for 6.5L (VIN Y), Engine Performance Wiring Diagrams, Commercial Chassis - Mechanical (1 of 3) for Chevrolet Forward Control P30 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 P30 1998

List of elements for 6.5L (VIN Y), Engine Performance Wiring Diagrams, Commercial Chassis - Mechanical (2 of 3) for Chevrolet Forward Control P30 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 P30 1998

List of elements for 6.5L (VIN Y), Engine Performance Wiring Diagrams, Commercial Chassis - Mechanical (3 of 3) for Chevrolet Forward Control P30 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 P30 1998

List of elements for 7.4L (VIN J), Engine Performance Wiring Diagrams, Motor Home Chassis (1 of 4) for Chevrolet Forward Control P30 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 P30 1998

List of elements for 7.4L (VIN J), Engine Performance Wiring Diagrams, Motor Home Chassis (2 of 4) for Chevrolet Forward Control P30 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 P30 1998

List of elements for 7.4L (VIN J), Engine Performance Wiring Diagrams, Motor Home Chassis (3 of 4) for Chevrolet Forward Control P30 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 P30 1998

List of elements for 7.4L (VIN J), Engine Performance Wiring Diagrams, Motor Home Chassis (4 of 4) for Chevrolet Forward Control P30 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 P30 1998

List of elements for Back-up Lamps Wiring Diagram, Commercial Chassis for Chevrolet Forward Control P30 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 P30 1998

List of elements for Back-up Lamps Wiring Diagram, Motorhome Chassis for Chevrolet Forward Control P30 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 P30 1998

List of elements for Exterior Lamps Wiring Diagram, Commercial Chassis for Chevrolet Forward Control P30 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 P30 1998

List of elements for Exterior Lamps Wiring Diagram, Motorhome Chassis for Chevrolet Forward Control P30 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 P30 1998

List of elements for Ground Distribution Wiring Diagram, Commercial Chassis (1 of 2) for Chevrolet Forward Control P30 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 P30 1998

List of elements for Ground Distribution Wiring Diagram, Commercial Chassis (2 of 2) for Chevrolet Forward Control P30 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 P30 1998

List of elements for Ground Distribution Wiring Diagram, Motor Home Chassis (1 of 2) for Chevrolet Forward Control P30 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 P30 1998

List of elements for Ground Distribution Wiring Diagram, Motor Home Chassis (2 of 2) for Chevrolet Forward Control P30 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 P30 1998

List of elements for Headlight Wiring Diagram, Commercial Chassis with DRL for Chevrolet Forward Control P30 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 P30 1998

List of elements for Headlight Wiring Diagram, Commercial Chassis without DRL for Chevrolet Forward Control P30 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 P30 1998

List of elements for Headlight Wiring Diagram, Motor Home Chassis with Dual Headlamps with DRL for Chevrolet Forward Control P30 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 P30 1998

List of elements for Headlight Wiring Diagram, Motor Home Chassis with Dual Headlamps without DRL for Chevrolet Forward Control P30 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 P30 1998

List of elements for Headlight Wiring Diagram, Motor Home Chassis with Single Headlamps with DRL for Chevrolet Forward Control P30 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 P30 1998

List of elements for Headlight Wiring Diagram, Motor Home Chassis with Single Headlamps without DRL for Chevrolet Forward Control P30 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 P30 1998

List of elements for Horn Wiring Diagram, Commercial Chassis for Chevrolet Forward Control P30 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 P30 1998

List of elements for Horn Wiring Diagram, Motor Home Chassis for Chevrolet Forward Control P30 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 P30 1998

List of elements for Instrument Cluster Wiring Diagram, Commercial Chassis for Chevrolet Forward Control P30 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 P30 1998

List of elements for Instrument Cluster Wiring Diagram, Motor Home Chassis (1 of 2) for Chevrolet Forward Control P30 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 P30 1998

List of elements for Instrument Cluster Wiring Diagram, Motor Home Chassis (2 of 2) for Chevrolet Forward Control P30 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 P30 1998

List of elements for Interior Light Wiring Diagram, Commercial Chassis for Chevrolet Forward Control P30 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 P30 1998

List of elements for Interior Light Wiring Diagram, Motor Home Chassis for Chevrolet Forward Control P30 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 P30 1998

List of elements for Power Distribution Wiring Diagram, Commercial Chassis (1 of 4) for Chevrolet Forward Control P30 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 P30 1998

List of elements for Power Distribution Wiring Diagram, Commercial Chassis (2 of 4) for Chevrolet Forward Control P30 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 P30 1998

List of elements for Power Distribution Wiring Diagram, Commercial Chassis (3 of 4) for Chevrolet Forward Control P30 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 P30 1998

List of elements for Power Distribution Wiring Diagram, Commercial Chassis (4 of 4) for Chevrolet Forward Control P30 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 P30 1998

List of elements for Power Distribution Wiring Diagram, Motor Home Chassis (1 of 4) for Chevrolet Forward Control P30 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 P30 1998

List of elements for Power Distribution Wiring Diagram, Motor Home Chassis (2 of 4) for Chevrolet Forward Control P30 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 P30 1998

List of elements for Power Distribution Wiring Diagram, Motor Home Chassis (3 of 4) for Chevrolet Forward Control P30 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 P30 1998

List of elements for Power Distribution Wiring Diagram, Motor Home Chassis (4 of 4) for Chevrolet Forward Control P30 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 P30 1998

List of elements for Shift Interlock Wiring Diagram, Commercial Chassis for Chevrolet Forward Control P30 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 P30 1998

List of elements for Shift Interlock Wiring Diagram, Motor Home Chassis for Chevrolet Forward Control P30 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 P30 1998

List of elements for Charging Wiring Diagram for Chevrolet Forward Control P30 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 P30 1998

List of elements for Starting Wiring Diagram for Chevrolet Forward Control P30 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 P30 1998

List of elements for 4.3L (VIN W), Transmission Wiring Diagram, 4L80-E for Chevrolet Forward Control P30 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 P30 1998

List of elements for 5.7L (VIN R), Transmission Wiring Diagram, 4L80-E for Chevrolet Forward Control P30 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 P30 1998

List of elements for 6.5L (VIN F), Transmission Wiring Diagram, 4L80-E for Chevrolet Forward Control P30 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 P30 1998

List of elements for 6.5L (VIN Y), Transmission Wiring Diagram, with Electronic Engine Controls for Chevrolet Forward Control P30 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 P30 1998

List of elements for 6.5L (VIN Y), Transmission Wiring Diagram, without Electronic Engine Controls for Chevrolet Forward Control P30 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 P30 1998

List of elements for 7.4L (VIN J), Transmission Wiring Diagram, 4L80-E for Chevrolet Forward Control P30 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 P30 1998

List of elements for Warning System Wiring Diagrams, Commercial Chassis for Chevrolet Forward Control P30 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 P30 1998

List of elements for Warning System Wiring Diagrams, Motor Home Chassis for Chevrolet Forward Control P30 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 P30 1998

List of elements for Provisions For Front Wiper/Washer Wiring Diagram, Commercial Chassis for Chevrolet Forward Control P30 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 P30 1998

List of elements for Provisions For Front Wiper/Washer Wiring Diagram, Motor Home Chassis for Chevrolet Forward Control P30 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