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All Wiring Diagrams for Chevrolet Forward Control P30 1999

AIR CONDITIONING

4.3L

4.3L VIN W, Manual A/C Wiring Diagram for Chevrolet Forward Control P30 1999

List of elements for 4.3L VIN W, Manual A/C Wiring Diagram for Chevrolet Forward Control P30 1999:

28

(at left rear of cylinder head) g114
(in engine harness approximately 4 cm (2 in) from breakout for 36 pin in-line connector, left side of firewall towards grommet on same) s110
(in engine harness approximately 7 cm (3 in) from throttle position sensor breakout toward an engine to fuel injector in-line harness connector: (12 pin, 4.3l vin w) (16 pin, 5.7l vin r) s138
(in engine harness, approximately 11 cm (4 in) from 36 pin in-line connector breakout on left side of firewall, towards grommet on left side of firewall) s144
(in engine harness, approximately 19 cm (8 in) from 36 pin in-line connector breakout on left side of firewall towards maf sensor) s132
(left interior bulkhead near relay bracket) g202
(on left side of radiator support) vehicle control module (vcm)
13 cm (5 in) from a/c compressor high pressure cut-off switch breakout) s124
A/c compressor clutch (left side of engine)
A/c compressor enable rly ctrl
A/c compressor high pressure cut-off switch (opens: 430 +/- 20 psi) (closes: 200 +/- 50 psi) (on rear of a/c compressor)
A/c compressor nca clutch diode (in engine harness, approx 13 cm (5 in) from breakout toward a/c compressor high pressure cut-off switch)
A/c compressor refrigerant pressure switch (body builder installed) (on a/c accumulator)
A/c compressor relay (on engine firewall relay bracket, under battery junction block)
A/c low pressure switch signal
A/c request signal
Breakout to maf sensor from inline resistor) s142
Eng bat fuse 10 15a
Gauges fuse 8 20a
Hot at all times
Hot in run & start
I/p fuse block (body builder installed) (behind dash panel)
Nca
Nca a
Pnk
Provisions for body builder hvac
Resistor (in engine harness, approx 23 cm (9 in) from breakout to maf & iat sensors)
S125

5.7L

5.7L VIN R, Manual A/C Wiring Diagram for Chevrolet Forward Control P30 1999

List of elements for 5.7L VIN R, Manual A/C Wiring Diagram for Chevrolet Forward Control P30 1999:

28

(at left rear of cylinder head) g114
(in engine harness approximately 4 cm (2 in) from breakout for 36 pin in-line connector, left side of firewall towards grommet on same) s110
(in engine harness approximately 7 cm (3 in) from throttle position sensor breakout toward an engine to fuel injector in-line harness connector: (12 pin, 4.3l vin w) (16 pin, 5.7l vin r) s138
(in engine harness, approximately 11 cm (4 in) from 36 pin in-line connector breakout on left side of firewall, towards grommet on left side of firewall) s144
(in engine harness, approximately 19 cm (8 in) from 36 pin in-line connector breakout on left side of firewall towards maf sensor) s132
(left interior bulkhead near relay bracket) g202
(on left side of radiator support) vehicle control module (vcm)
13 cm (5 in) from a/c compressor high pressure cut-off switch breakout) s124
A/c compressor clutch (left side of engine)
A/c compressor enable rly ctrl
A/c compressor high pressure cut-off switch (opens: 430 +/- 20 psi) (closes: 200 +/- 50 psi) (on rear of a/c compressor)
A/c compressor nca clutch diode (in engine harness, approx 13 cm (5 in) from breakout toward a/c compressor high pressure cut-off switch)
A/c compressor refrigerant pressure switch (body builder installed) (on a/c accumulator)
A/c compressor relay (on engine firewall relay bracket, under battery junction block)
A/c low pressure switch signal
A/c request signal
Breakout to maf sensor from inline resistor) s142
Eng bat fuse 10 15a
Gauges fuse 8 20a
Hot at all times
Hot in run & start
I/p fuse block (body builder installed) (behind dash panel)
Nca
Nca a
Pnk
Provisions for body builder hvac
Resistor (in engine harness, approx 23 cm (9 in) from breakout to maf & iat sensors)
S125

6.5L

6.5L VIN F, Manual A/C Wiring Diagram, Commercial Chassis for Chevrolet Forward Control P30 1999

List of elements for 6.5L VIN F, Manual A/C Wiring Diagram, Commercial Chassis for Chevrolet Forward Control P30 1999:

22

(at rear of left cylinder head) g114
(in engine harness on end of a/c compressor clutch diode, approximately 13 cm (5 in) from a/c compressor high pressure cut-off switch breakout) s124
(in engine harness, approximately 11 cm (4 in) from breakout for 36 pin in-line connector in left side of firewall, toward a/c compressor connectors) s132
(left interior bulkhead near relay bracket) g202
A/c compressor clutch
A/c compressor clutch diode
A/c compressor high pressure cut-off switch (on rear of a/c compressor)
A/c compressor refrigerant pressure switch (body builder installed) (on a/c accumulator)
A/c compressor relay (on engine firewall relay bracket, under battery junction block)
A/c compressor relay ctrl
A/c request signal
Approximately 4 cm (2 in) from starter motor breakout towards black black 15 pin harness in-line connector on frame rail) s118
Eng bat fuse 10 15a
Gauges fuse 8 20a
Hot at all times
Hot in run & start
I/p fuse block (body builder installed) (behind dash panel)
Nca
Pnk
Powertrain control module (pcm) (on left side of driver's island on relay bracket)
Resistor nca (in engine harness, approximately 25 cm (10 in) from powertrain control module (pcm) connector c3)
S125

6.5L VIN F, Manual A/C Wiring Diagram, Motor Home Chassis for Chevrolet Forward Control P30 1999

List of elements for 6.5L VIN F, Manual A/C Wiring Diagram, Motor Home Chassis for Chevrolet Forward Control P30 1999:

23

(at right rear of cylinder head) g117
(in breakout for a/c compressor clutch, 21 cm (9 in) from a/c compressor clutch connector) s123
(in engine harness, 35 cm (13 in) from grommet left side of firewall in engine compartment) s115
(mounted to top front of steering column support plate) g207
A/c compressor clutch
A/c compressor clutch diode
A/c compressor high pressure cut-off switch (on rear of a/c compressor)
A/c compressor refrigerant pressure switch (body builder installed) (on a/c accumulator)
A/c compressor relay (on right side of driver's island)
A/c compressor relay ctrl
A/c request signal
Eng bat fuse 10 15a
Gauges fuse 8 20a
Grommet toward 56-pin in-line connector on left side of dash) s235
Hot at all times
Hot in run & start
I/p fuse block (body builder installed) (behind dash panel)
Nca
Pnk
Powertrain control module (pcm) (on left side of driver's island on relay bracket)
S122 (in breakout for a/c compressor clutch, 21 cm (9 in) from a/c compressor clutch connector)
S168 (in engine harness, 4 cm (2 in) from breakout for 2 in-line connectors near battery junction block, left side of firewall)
Stoplamp switch)

6.5L VIN Y, Manual A/C Wiring Diagram for Chevrolet Forward Control P30 1999

List of elements for 6.5L VIN Y, Manual A/C Wiring Diagram for Chevrolet Forward Control P30 1999:

13

(in engine harness on end of a/c compressor clutch diode, approximately 13 cm (5 in) from a/c compressor high pressure cut-off switch breakout) s124
(in engine harness, approximately 4 cm (2 in) from breakout for abs harness in-line connectors) s110
(left interior bulkhead near relay bracket) g202
A/c compressor clutch
A/c compressor clutch diode
A/c compressor high pressure cut-off switch (open: 430 +/- 20 psi) (close: 200 +/- 50 psi) (on rear of a/c compressor)
A/c compressor refrigerant pressure switch (body builder installed) (on a/c accumulator)
A/c compressor relay (on engine firewall relay bracket, under battery junction block)
Eng-bat fuse 10 15a
Hot at all times
I/p fuse block (body builder installed) (behind dash panel)
Nca
S125

7.4L

7.4L VIN J, Manual A/C Wiring Diagram for Chevrolet Forward Control P30 1999

List of elements for 7.4L VIN J, Manual A/C Wiring Diagram for Chevrolet Forward Control P30 1999:

27

(at right rear of cylinder head) g117
(body builder a/c controls)
(in breakout for a/c compressor clutch, 21 cm (9 in) from a/c compressor clutch connector) s123
(in breakout for vcm, 20 cm (8 in) from main engine harness) s132
(in breakout for vcm, 20 cm (8 in) from main engine harness) s140
(in engine harness, 35 cm (13 in) from grommet left side of firewall in engine compartment) s115
(mounted to top front of steering column support plate) g207
1100 ohms (+/- 1%) 0.75 watt (in engine harness, 20 cm (8 in) from abs harness breakout)
A/c compressor clutch
A/c compressor enable rly ctrl
A/c compressor high pressure cut-off switch (on rear of a/c compressor)
A/c compressor refrigerant pressure switch (body builder installed) (open: 2-9 psi) (close: 22-32 psi) (on a/c accumulator)
A/c compressor relay (on right side of driver's island)
A/c request signal
Diode
Eng bat fuse 10 15a
Gauges fuse 8 20a
Grommet toward 56-pin in-line connector on left side of dash) s235
Hot at all times
Hot in run & start
I/p fuse block (body builder installed) (behind dash panel)
Low pressure cutout signal
Nca
Pnk
S122 (in breakout for a/c compressor clutch, 21 cm (9 in) from a/c compressor clutch connector)
S150
Vehicle control module (vcm) (on top of radiator support)

ANTI-LOCK BRAKES

Anti-lock Brake Wiring Diagrams, Commercial Chassis for Chevrolet Forward Control P30 1999

List of elements for Anti-lock Brake Wiring Diagrams, Commercial Chassis for Chevrolet Forward Control P30 1999:

50

(gas, mech diesel) (electric diesel)
1-3 fuse 9 10a
32 cm from breakout to battery junction block)
Abs diagnostic link
Abs ind
Abs lamp control
Battery
Brake ind
Brake pressure differential switch (internal to electronic brake control module)
Brake sw input
Brake warning lamp
Data link connector (below dash, near steering column)
Diesel
Diode network (on i/p harness, body builder installed)
Electronic brake control module (below radiator, on lower crossmember)
Engine control system
Fuse link (in battery junction block, at left rear of engine compt)
G113 (left front frame rail)
G125 (top of thermostat housing)
Gas
Gauges fuse 8 20a
Ground
Hot at all times
Hot in run
Hot in run and start
I/p fuse block (behind dash panel, body builder installed)
Ignition
Instrument cluster
Left front wheel speed sensor
Module (left side of radiator support)
Nca
Pnk
Powertrain control module (left side of driver's island on relay bracket)
Red
Right front wheel speed sensor
S104 (diesel) s150 (gas) (engine harn, 18 cm from breakout to abs connectors) (gas) (engine harn, 25 cm from breakout to battery junction block) (diesel)
S133 s233
S161
S165 (abs harn, 10 cm from breakout to abs connectors)
S200 (gas) s102 (diesel) (gas: dash side of engine harn, 19 cm from p100; diesel: engine harn,
S207
Sensor high
Sensor low
Serial data line
Stoplamps switch (at brake pedal support)
Tan
Vehicle control
Vehicle speed input
Vehicle speed sensor calibrator (left side of driver's island on relay bracket)
Warnings system

Anti-lock Brake Wiring Diagrams, Motor Home Chassis for Chevrolet Forward Control P30 1999

List of elements for Anti-lock Brake Wiring Diagrams, Motor Home Chassis for Chevrolet Forward Control P30 1999:

51

(gas) (diesel)
(gas: engine harn, 15 cm from breakout to abs connectors; diesel: dash side of engine harn, 7 cm from breakout to wiper switch)
1-3 fuse 9 10a
Abs diagnostic link
Abs ind
Abs lamp control
Battery
Brake ind
Brake pressure differential switch (internal to electronic brake control module)
Brake sw input
Brake warning lamp
Data link connector (below dash, near steering column)
Diesel
Diode network (on i/p harness, body builder installed)
Electronic brake control module (below radiator, on lower crossmember)
Electronic transmission system
Fuse link (in battery junction block, at left rear of engine compt)
G113 (left front frame rail)
G125 (top of thermostat housing)
Gas
Gauges fuse 8 20a
Ground
Hot at all times
Hot in run
Hot in run and start
I/p fuse block (behind dash panel, body builder installed)
Ignition
Instrument cluster
Left front wheel speed sensor
Module (top of radiator support)
Nca
Pnk
Powertrain control module (left side of driver's island on relay bracket)
Red
Right front wheel speed sensor
S102 (gas) s200 (diesel) (gas: engine harn, 25 cm from breakout to windshield wiper; diesel: dash side of engine harn, 8 cm from breakout to turn signal switch)
S116 s229
S165 (abs harn, 10 cm from breakout to abs connectors)
S167
S170 (gas)
S202 (diesel)
S211
Sensor high
Sensor low
Serial data line
Stoplamps switch (at brake pedal support)
Tan
Vehicle control
Vehicle speed input
Vehicle speed sensor calibrator (left side of driver's island on relay bracket)
Warnings system

COMPUTER DATA LINES

Computer Data Lines, Commercial Chassis for Chevrolet Forward Control P30 1999

List of elements for Computer Data Lines, Commercial Chassis for Chevrolet Forward Control P30 1999:

18

B10
Data clss 2
Data link connector (dlc) (below dash, near steering column)
Diesel gas
Electronic brake control module (ebcm) (below radiator, on lower crossmember)
Eng bat fuse 10 15a
G114 (left rear of engine)
G200 (left interior bulkhead, near relay bracket)
Hot at all times
I/p fuse block
S110
S143
S144
S150 (diesel- eng harn, 14 cm from left rear eng compartment grommet, gas- eng harn, 4 cm from battery junction block breakout)
Serial data
Tan
Transmission control module (tcm) (diesel a/t only) (on left side of driver's island, on relay bracket)
Vehicle control module (vcm) powertrain control module (pcm) (gas- on left side of driver's island, on relay bracket, diesel- on top of radiator support)

Computer Data Lines, Motor Home Chassis for Chevrolet Forward Control P30 1999

List of elements for Computer Data Lines, Motor Home Chassis for Chevrolet Forward Control P30 1999:

19

(engine harness, 15 cm from cruise control module breakout) (gas) g201
Data clss 2
Data link connector (below dash, near steering column)
Diag sig
Diesel
Electronic brake control module (ebcm) (below radiator, on lower crossmember)
Eng bat fuse 10 15a
G125 (top of thermostat housing)
G202 (left side of dash)
Gasoline
Hot at all times
I/p fuse block
Powertrain control module (pcm) (on left side of driver's island, on relay bracket)
S101
S143
S144
S202 (diesel) (engine harness, 7 cm from wiper switch breakout)
Serial data
Vehicle control module (vcm) (top of radiator support)

COOLING FAN

6.5L

6.5L VIN F, Cooling Fan Wiring Diagram for Chevrolet Forward Control P30 1999

List of elements for 6.5L VIN F, Cooling Fan Wiring Diagram for Chevrolet Forward Control P30 1999:

14

(in dash side of engine harness, 28 cm (11 in) from grommet left side of firewall) s228
(in engine harness, 9 cm (4 in) from breakout for auxiliary engine coolant fan, toward grommet left side of firewall) s113
(mounted to top front of steering column support plate) g207
Auxiliary engine coolant fan a/c pressure switch (close at: 205-265 psi) (open at: 125 psi min) (in a/c compressor high pressure line (body builder installed)
Auxiliary engine coolant fan temperature switch (in thermostat housing crossover, front of engine)
Auxiliary engine cooling fan (mounted on front of radiator)
Eng-1 fuse 15 20a
Fan control relay (on top of steering column support, behind steering column)
Hot at all times
Hot in run & start
I/p fuse block (body builder installed) (behind dash panel)
Pnk
Red
S101 (in engine harness, 16 cm (7 in) from breakout for auxiliary engine coolant fan, toward grommet left side of firewall)

6.5L VIN Y, Cooling Fan Wiring Diagram for Chevrolet Forward Control P30 1999

List of elements for 6.5L VIN Y, Cooling Fan Wiring Diagram for Chevrolet Forward Control P30 1999:

12

(in engine harness, approximately 5 cm (2 in) from breakout for cold advance solenoid, engine coolant temperature switch, toward glowplug controller breakout) s116
(left interior bulkhead near relay bracket) g202
Auxiliary engine coolant fan (mounted on front of radiator)
Auxiliary engine coolant fan a/c pressure switch (body builder installed) (close at: 205-265 psi) (open at 125 psi min) (in a/c compressor high pressure line)
Eng-1 fuse 15 20a
Fan control relay (on engine firewall relay bracket, under battery junction block)
Hot at all times
Hot in run & start
I/p fuse block (body builder installed) (behind dash panel)
Pnk
Red
S110 (in engine harness, approximately 4 cm (2 in) from breakout for abs harness connectors)

7.4L

7.4L VIN J, Cooling Fan Wiring Diagram for Chevrolet Forward Control P30 1999

List of elements for 7.4L VIN J, Cooling Fan Wiring Diagram for Chevrolet Forward Control P30 1999:

12

(top of steering column support plate) g207
Aux fan ctrl
Aux fan sw signal
Auxiliary engine coolant fan a/c pressure switch (close at: 205-265 psi) (open at: 125 psi min) (in a/c compressor high pressure line (body builder installed)
Eng-bat fuse 10 15a
Engine coolant fan motor (mounted to radiator)
Fan control relay (on top of steering column support, behind steering column)
Hot at all times
I/p fuse block (behind dash panel)
In-line connector on left side of dash) s235
Red
Vehicle control module (vcm) (on top of radiator support)

CRUISE CONTROL

4.3L

4.3L VIN W, Cruise Control Wiring Diagram for Chevrolet Forward Control P30 1999

List of elements for 4.3L VIN W, Cruise Control Wiring Diagram for Chevrolet Forward Control P30 1999:

38

1-3 fuse 9 15a
A/t iss high
A/t iss low
Automatic transmission shaft speed sensor (a/t iss) (left side of transmission)
Brake sw input
Cruise control module (on left radiator support bracket)
Cruise control switch
Cruise engaged
Cruise engaged in
Cruise on/off input
Exterior lights system
G117 (rear of right cylinder head)
G125 (on top of thermostat housing)
Ground
Hazard lamps flasher (left of steering column)
Hot at all times
Hot in run
I/p fuse block (behind dash panel) (body builder installed)
Ignition
Nca
Off
R/a
R101 resistor (engine harness, 7 cm from breakout to engine coolant fan motor conn)
Resume/accel input
S/c
S102 (engine harness, near bulkhead)
S116
S124 (engine harness, 11 cm from breakout to cruise control module)
S126
S143
Set/coast input
Stop/haz fuse 1 15a
Stoplamp sw signal
Stoplamps switch (above brake pedal)
Torque converter clutch & stoplamps switch (above brake pedal)
Vehicle control module (vcm) (on left radiator support bracket)
Vss input
Vss output

5.7L

5.7L VIN R, Cruise Control Wiring Diagram for Chevrolet Forward Control P30 1999

List of elements for 5.7L VIN R, Cruise Control Wiring Diagram for Chevrolet Forward Control P30 1999:

38

1-3 fuse 9 15a
A/t iss high
A/t iss low
Automatic transmission shaft speed sensor (a/t iss) (left side of transmission)
Brake sw input
Cruise control module (on left radiator support bracket)
Cruise control switch
Cruise engaged
Cruise engaged in
Cruise on/off input
Exterior lights system
G117 (rear of right cylinder head)
G125 (on top of thermostat housing)
Ground
Hazard lamps flasher (left of steering column)
Hot at all times
Hot in run
I/p fuse block (behind dash panel) (body builder installed)
Ignition
Nca
Off
R/a
R101 resistor (engine harness, 7 cm from breakout to engine coolant fan motor conn)
Resume/accel input
S/c
S102 (engine harness, near bulkhead)
S116
S124 (engine harness, 11 cm from breakout to cruise control module)
S126
S143
Set/coast input
Stop/haz fuse 1 15a
Stoplamp sw signal
Stoplamps switch (above brake pedal)
Torque converter clutch & stoplamps switch (above brake pedal)
Vehicle control module (vcm) (on left radiator support bracket)
Vss input
Vss output

6.5L

6.5L VIN F, Cruise Control Wiring Diagram for Chevrolet Forward Control P30 1999

List of elements for 6.5L VIN F, Cruise Control Wiring Diagram for Chevrolet Forward Control P30 1999:

31

(behind dash panel (body builder installed)
1-3 fuse 9 15a
A/t iss high
A/t iss low
A11
Automatic transmission shaft speed sensor (a/t iss) (left side of transmission)
B10
Cruise control switch
Cruise on/off input
D10
D11
Exterior lights system
Hazard lamps flasher (left of steering column)
Hot at all times
Hot in run
I/p fuse block
Nca
Off
Powertrain control module (pcm) (on left side of driver's island)
R/a
Resume/accel input
S/c
S200 (i/p side of engine harn, 8 cm from breakout to turn signal switch conn)
S224 (i/p side of engine harness, 16 cm from p100)
S229
Set/coast input
Stop/haz fuse 1 15a
Stoplamp sw signal
Stoplamps switch (above brake pedal)
Tcc/stop sw sig
Torque converter clutch & stoplamps switch (above brake pedal)

6.5L VIN Y, Cruise Control Wiring Diagram for Chevrolet Forward Control P30 1999

List of elements for 6.5L VIN Y, Cruise Control Wiring Diagram for Chevrolet Forward Control P30 1999:

31

(behind dash panel (body builder installed)
1-3 fuse 9 15a
A/t iss high
A/t iss low
A11
Automatic transmission shaft speed sensor (a/t iss) (left side of transmission)
B10
Cruise control switch
Cruise on/off input
D10
D11
Exterior lights system
Hazard lamps flasher (left of steering column)
Hot at all times
Hot in run
I/p fuse block
Nca
Off
Powertrain control module (pcm) (on left side of driver's island)
R/a
Resume/accel input
S/c
S200 (i/p side of engine harn, 8 cm from breakout to turn signal switch conn)
S224 (i/p side of engine harness, 16 cm from p100)
S229
Set/coast input
Stop/haz fuse 1 15a
Stoplamp sw signal
Stoplamps switch (above brake pedal)
Tcc/stop sw sig
Torque converter clutch & stoplamps switch (above brake pedal)

7.4L

7.4L VIN J, Cruise Control Wiring Diagram for Chevrolet Forward Control P30 1999

List of elements for 7.4L VIN J, Cruise Control Wiring Diagram for Chevrolet Forward Control P30 1999:

38

1-3 fuse 9 15a
A/t iss high
A/t iss low
Automatic transmission shaft speed sensor (a/t iss) (left side of transmission)
Brake sw input
Cruise control module (on left radiator support bracket)
Cruise control switch
Cruise engaged
Cruise engaged in
Cruise on/off input
Exterior lights system
G117 (rear of right cylinder head)
G125 (on top of thermostat housing)
Ground
Hazard lamps flasher (left of steering column)
Hot at all times
Hot in run
I/p fuse block (behind dash panel) (body builder installed)
Ignition
Nca
Off
R/a
R101 resistor (engine harness, 7 cm from breakout to engine coolant fan motor conn)
Resume/accel input
S/c
S102 (engine harness, near bulkhead)
S116
S124 (engine harness, 11 cm from breakout to cruise control module)
S126
S143
Set/coast input
Stop/haz fuse 1 15a
Stoplamp sw signal
Stoplamps switch (above brake pedal)
Torque converter clutch & stoplamps switch (above brake pedal)
Vehicle control module (vcm) (on left radiator support bracket)
Vss input
Vss output

ENGINE PERFORMANCE

4.3L

4.3L VIN W, Engine Performance Wiring Diagrams (1 of 4) for Chevrolet Forward Control P30 1999

List of elements for 4.3L VIN W, Engine Performance Wiring Diagrams (1 of 4) for Chevrolet Forward Control P30 1999:

65

(on throttle body assembly) idle air control (iac) valve
(right front of engine at crankshaft pulley)
(top right side of engine) evaporative emissions (evap) canister purge 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 (internal to distributor)
Ckp sens rtn
Crankshaft position (ckp) sensor
Ect sensor input
Egr posit input
Evaporative emissions (evap) canister vent valve (right frame rail in front of fuel tank)
Fuel inj 1 ctrl
Fuel inj 2 ctrl
Fuel inj 3 ctrl
Fuel inj 4 ctrl
Fuel inj 5 ctrl
Fuel inj 6 ctrl
Fuel lev
G114 (rear of left cylinder head)
Hall effect sensor
Heated oxygen sensor bank 1, sensor 1 pre-converter (left exhaust down pipe, before 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
Ign feed
Knock sens sig
Knock sensor (ks) (top center rear of engine)
Map sensor input
Mass air flow input
Nca
Pnk
Pnk c
Pnk d
Pnk pnk pnk
Purge vent ctrl
Return
S138
S139
S140
Sensor signal
Tan
Tank press sens
Tank pressure sensor (top of fuel tank)
Tcc pwm sol ctrl
Tft sig
Throttle position sens
Vehicle control module (vcm) (com. van: left side of radiator support motor home: top of radiator support)
Vehicle speed out
Vehicle speed sensor (vss) (left side of transmission)
Vss rtn
Vss sig
Whl spd sig, left frt

4.3L VIN W, Engine Performance Wiring Diagrams (2 of 4) for Chevrolet Forward Control P30 1999

List of elements for 4.3L VIN W, Engine Performance Wiring Diagrams (2 of 4) for Chevrolet Forward Control P30 1999:

35

(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 1 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 down pipe, before catalytic converter)
Heated oxygen sensor, bank 1 sensor 2 (on exhaust system after catalytic converter)
Hot in run & start
I/p fuse block (behind dash panel) (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 (3 of 4) for Chevrolet Forward Control P30 1999

List of elements for 4.3L VIN W, Engine Performance Wiring Diagrams (3 of 4) for Chevrolet Forward Control P30 1999:

42

(eng harn, approx 23 cm from ect sensor breakout)
(eng harn, approx 8cm from tps breakout) s136
(engine harn, 7 cm from ignition control module breakout)
(left frame rail, in front of fuel tank) g416
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 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 (behind dash panel) (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 (near center of intake manifold, behind air intake)
Map
Mass air flow sensor (maf) (mounted in fresh air intake, behind air filter box)
Nca
Pnk
Pnk pnk pnk
R100 (1100 ohms .75 watts)
Red
Ref lo
S119 (eng harn, approx 11cm from ect sensor breakout)
S135
S138
S142 (eng harn, approx 23cm from maf sensor breakout)
S144
S145
S207
S218
S406
Speedo meter
Tacho meter
Tan a
Temp
Throttle position (tp) sensor (on throttle body, top of engine)

4.3L VIN W, Engine Performance Wiring Diagrams (4 of 4) for Chevrolet Forward Control P30 1999

List of elements for 4.3L VIN W, Engine Performance Wiring Diagrams (4 of 4) for Chevrolet Forward Control P30 1999:

68

(engine harn, 18 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
Brake sig
Cylinder 1
Cylinder 2
Cylinder 3
Cylinder 4
Cylinder 5
Cylinder 6
Data link connector (dlc) (partial) (below dash, near steering column)
Distributor (top rear of engine)
Ecm bat fuse 6 20a
Egr valve ctrl
Electronic brake control module
Evap can purge ctrl
Fuel level
Fuel pump prime connector (taped to fuel pump relay breakout)
Fuel pump relay (com. van: on engine firewall relay bracket, under battery junction block, motor home: on right side of driver's island)
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 (behind dash panel) (body builder installed)
Ign feed
Ignition coil (top right side of engine)
Ignition control module (right top of engine, at ignition coil)
Ignition feed
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
S133
S134
S138
S143
S150
S200
Serial data
Shift interlock system
Spark plugs
Timing control return
Timing control signal
Timing ctrl sig
Torque converter clutch & stop lamp switch (at brake pedal suppport)
Transmission input speed sensor (on left side of trnasmission, near the middle)
Vcm ground
Vehicle control module (vcm) (com van: left side of radiator support motor home: top of radiator support)
Vss output

5.7L

5.7L VIN R, Engine Performance Wiring Diagrams (1 of 4) for Chevrolet Forward Control P30 1999

List of elements for 5.7L VIN R, Engine Performance Wiring Diagrams (1 of 4) for Chevrolet Forward Control P30 1999:

66

(on throttle body assembly) idle air control (iac) valve
(right front of engine at crankshaft pulley) crankshaft position sensor (ckp)
(top right side of engine) evaporative emissions (evap) canister purge valve
1-2 shift sol ctrl
2-3 shift sol ctrl
4x ckp sens sig
A pnk
Anti-lock brake system
Cam posit sens rtn
Cam posit sens sig
Camshaft position (cmp) sensor (internal to distributor)
Ckp sens rtn
Ect sensor in
Egr posit in
Evaporative emissions (evap) canister vent solenoid valve (on right frame rail in front of fuel tank)
Fuel inj 1 ctrl
Fuel inj 2 ctrl
Fuel inj 3 ctrl
Fuel inj 4 ctrl
Fuel inj 5 ctrl
Fuel inj 6 ctrl
Fuel inj 7 ctrl
Fuel inj 8 ctrl
Fuel lev signal
Fuel tank pressure sensor (at fuel tank)
G114 (rear of left cylinder head)
Hall effect sensor
Heated oxygen sensor, bank 1 sensor 1 (left exhaust down pipe, after catalytic converter)
Heated oxygen sensor, bank 2 sensor 1 (right exhaust down pipe. before 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 c
Pnk d
Pnk pnk
Purge vent
S138
S139
S140
Tan
Tan a
Tank pressure
Tcc pwm sol ctrl
Tft sig
Throttle posit sens
Vehicle control module (vcm) (com. van: left side of radiator support, motor home: top of radiator support)
Vehicle speed out
Vehicle speed sensor (vss) (left side of transmission)
Vss rtn
Vss sig

5.7L VIN R, Engine Performance Wiring Diagrams (2 of 4) for Chevrolet Forward Control P30 1999

List of elements for 5.7L VIN R, Engine Performance Wiring Diagrams (2 of 4) for Chevrolet Forward Control P30 1999:

29

(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) valve (top front of engine)
Fuel injector
Heated oxygen sensor, bank 1 sensor 2 (left exhaust system, after catalytic converter)
Heated oxygen sensor, bank 2 sensor 2 (right exhaust system after catalytic converter)
Hot in run & start
I/p fuse block (behind dash panel) (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 (3 of 4) for Chevrolet Forward Control P30 1999

List of elements for 5.7L VIN R, Engine Performance Wiring Diagrams (3 of 4) for Chevrolet Forward Control P30 1999:

45

(eng harn, approx 23 cm from maf sensor breakout)
(eng harn, approx 4 cm from breakout for in-line connector toward ignition control module)
(eng harn, approx 8cm from ect sensor breakout)
(eng harn, approx 8cm from tp sensor breakout)
(left frame rail, in front of fuel tank) g416
(rear of left cylinder head) g114
5v ref
A/c compressor high pressure cut-off switch (rear of a/c compressor)
Engine coolant temperature (ect) sensor (top front of engine)
F2 eng-bat fuse 10 15a f1
Fuel gauge
Fuel sender & fuel pump (top of fuel tank)
G114 (rear of left cylinder head)
Gauges fuse 8 20a
Hot at all times
Hot in run & start
I/p fuse block (behind dash panel) (body builder installed)
Instrument cluster
Intake air temperature (iat) sensor (mounted in fresh air intake, behind air filter box)
Manifold absolute pressure (map) sensor (near center of intake manifold, behind air intake)
Map
Mass air flow (maf) sensor (mounted in fresh air intake, behind air filter box)
Nca
Pnk
R100 (1100 ohms .75 watts)
Red
Ref lo
S119 (eng harn, approx 4cm from ect sensor breakout)
S135
S136
S138
S142
S144
S145
S207
S218
S406
Service engine soon indicator
Speedo meter
Tacho meter
Tan
Tan a
Temp
Throttle position (tp) sensor (on throttle body, top of engine)
Trans fuse 17 10a

5.7L VIN R, Engine Performance Wiring Diagrams (4 of 4) for Chevrolet Forward Control P30 1999

List of elements for 5.7L VIN R, Engine Performance Wiring Diagrams (4 of 4) for Chevrolet Forward Control P30 1999:

76

(below dash,
(eng harn, approx 18 cm from breakout for in-line connector, toward left bulkhead grommet)
(i/p harn, approx 19 cm from left bulkhead grommet)
(left interior bulkhead near relay bracket) 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
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-bat fuse 6 20a
Egr ctrl
Electronic brake control module
Evap canp valve driver
Feed ignition
Fuel lev
Fuel pump a prime connector (taped to fuel pump relay breakout)
Fuel pump relay (com. van: on engine firewall relay bracket, under battery junction block, motor home: on right side of driver's island)
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 (behind dash panel) (body builder installed)
Ign feed
Ignition coil (top right side of engine)
Ignition control module (right top of engine, at ignition coil)
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
Return control
S110
S133
S134
S138
S143
S150
S200
Serial data
Signal control timing
Spark plugs
Timing ctrl sig
Torque converter clutch & stop lamp switch (at brake pedal support)
Transmission input speed sensor (left side of transmission, near the middle)
Vcm gnd
Vehicle control module (vcm) (com. van: left side of radiator support, motor home: top of radiator support)
Vss output

6.5L

6.5L VIN F, Engine Performance Wiring Diagrams, Motorhome Chassis (1 of 4) for Chevrolet Forward Control P30 1999

List of elements for 6.5L VIN F, Engine Performance Wiring Diagrams, Motorhome Chassis (1 of 4) for Chevrolet Forward Control P30 1999:

103

(eng harn, 14 cm from in-line connector toward fuel heater)
(eng harn, 20 cm from oil pressure gauge sensor breakout)
(lower left front of eng, behind torsional damper) crankshaft position sensor
(on top right center of engine) boost sensor
(or 506)
(top of engine, in air intake) intake air temperature sensor
(top of thermostat housing) g119
(top right front of engine) engine coolant temperature sensor
A/c request sig
A/c system
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
B10
B11
B12
Battery
Boost & ckp 5 volt ref
Boost sensor sig
C10
C11
C12
C13
C14
C15
C16
Camshaft posit sens
Ckp sen grd
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
Pnk
Powertrain control module (pcm) (left side of driver's island on relay bracket)
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
S143
S180
S186
Sensor gnd
Set
Solenoid valve 1-2 shift
Solenoid valve 2-3 shift
Solenoid valve tcc pwm
Solid state
Speed control switch
Stoplamp switch
Tan
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 input shaft speed sensor (left side of transmission, near the middle)
Transmission output speed sensor (left side of trans- mission, near the middle)
Transmission speed input
Transmission temperature sensor
Vehicle speed sensor calibrator (left side of driver's island under relay bracket)
Vss out
Vss signal

6.5L VIN F, Engine Performance Wiring Diagrams, Motorhome Chassis (2 of 4) for Chevrolet Forward Control P30 1999

List of elements for 6.5L VIN F, Engine Performance Wiring Diagrams, Motorhome Chassis (2 of 4) for Chevrolet Forward Control P30 1999:

46

(at brake pedal support)
(i/p side of eng harn, 8 cm from breakout for turn signal switch connector) s200
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
Electronic brake control module (below radiator, on lower crossmember)
Eng-1 h6
Engine shutoff solenoid (at fuel injection pump)
F4 i-3 fuse 9 15a f3
Fuel sol high
Fuel sol low
Fuel sole- noid
Fuel solenoid driver (on side of fuel injection pump)
Fuse 15 20a
G6 ecm-1 fuse 12 20a g5
Haz fuse 11 15a
Hazard lamps flasher (inner left side steering column support bracket)
High
Hot at all times
Hot in run
Hot in run or 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 assembly)
Pnk
Red
S185
S224 (i/p side of eng harn, 16 cm from left bulkhead grommet toward pcm)
S229
S232
Stop lamp switch
Stop/ g7
Tan d
Torque converter clutch (tcc) & stoplamps switch

6.5L VIN F, Engine Performance Wiring Diagrams, Motorhome Chassis (3 of 4) for Chevrolet Forward Control P30 1999

List of elements for 6.5L VIN F, Engine Performance Wiring Diagrams, Motorhome Chassis (3 of 4) for Chevrolet Forward Control P30 1999:

35

(eng harn, approx 24 cm from in-line connector toward fuel heater) s182
(left frame rail, infront of fuel tank) g416
(right rear of eng) g117
87a
California
Ecm-bat fuse 6 20a
Eng- bat fuse 10 15a
Federal
Fuel heater (part of fuel/water separator)
Fuel lift pump (inside right frame rail)
Fuel pump prime connector (taped to fuel pump relay breakout)
Fuel pump relay (on right side of driver's island)
G119 (top of thermostat housing)
Gauges fuse 8 20a
Hot at all times
Hot in run and start
I/p fuse block
Instrument cluster
Malfunction indicator lamp (mil)
Pnk
Red
S114
S168
S181
S206
S211
S235
S400
Service throttle soon indicator
Speed meter
Tan
Wait to start indicator
Wastegate solenoid (top left rear of eng)
Water in fuel indicator
Water in-fuel indicator sensor (part of fuel/water separator (filter), rear of intake manifold)

6.5L VIN F, Engine Performance Wiring Diagrams, Motorhome Chassis (4 of 4) for Chevrolet Forward Control P30 1999

List of elements for 6.5L VIN F, Engine Performance Wiring Diagrams, Motorhome Chassis (4 of 4) for Chevrolet Forward Control P30 1999:

58

"serv throttle soon" ind
(dlc) (partial) (below dash, near steering column)
(left rear of eng, near firewall) glow plug controller
A/c enable
A/c system
Antilock brakes system
App 2 5 volt ref
Battery
C10
C11
C12
C13
C14
C15
C16
C4 a
California
D10
D11
D12
D13
D14
D15
D16
Data link connector
Eso ctrl
Federal
Fuel inject ctrl
Fusible link (22 ga rust)
G117 (right rear of eng)
G119 (top of thermostat housing)
G207 (top front of steering column support plate)
Glow plug controller (left rear of eng, near firewall)
Glow plug out
Glow plug sig
Grd
Ground
Hot at all times
Ignition
Left bank glow plugs
Mil ind ctrl
Nca
Pnk
Powertrain control module (pcm) (left side of driver's island on relay bracket)
Red
Right bank glow plugs
Rly ctrl
S101
S143
S181
Serial data sig
Shift sol 1-2 input
Shift sol 2-3 input
Tan
Tcc pwm sol vlv ctrl
Wait to start ind ctrl
Wastegate sol ctrl
Wiper switch) s202

6.5L VIN Y, Engine Performance Wiring Diagrams, Commercial Chassis - Electronic (1 of 4) for Chevrolet Forward Control P30 1999

List of elements for 6.5L VIN Y, Engine Performance Wiring Diagrams, Commercial Chassis - Electronic (1 of 4) for Chevrolet Forward Control P30 1999:

104

(a/t)
(center rear of intake manifold) manifold absolute pressure sensor
(eng harn, 14 cm from in-line connector toward fuel heater)
(eng harn, 20 cm from oil pressure gauge sensor breakout)
(eng harn, approx 17 cm from breakout for in-line conn. toward left bulkhead grommet)
(front of engine, in air intake) intake air temperature sensor
(left rear of cylinder head) g114
(lower left front of eng, behind torsional damper) crankshaft position sensor
(m/t)
(or 506)
(right front of eng, near generator bracket) g119
(top right front of engine) engine coolant temperature sensor
2-3 shift solenoid valve
379 (or 420)
A/c request sig
A/c system
A/t
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
B10
B11
B12
Battery
Boost & ckp 5 volt ref
Boost sensor sig
C10
C11
C12
C13
C14
C15
C16
Camshaft posit sens
Ckp sen grd
Ckp sens input
Closure gnd
Closure signal
Clutch pedal position switch (top of clutch pedal suport)
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
M/t
Oss high
Oss low
Oss sig
Pnk
Powertrain control module (pcm) (left side of driver's island on relay bracket)
Press ctrl sol vlv hi
Press ctrl sol vlv lo
Pressure control solenoid valve
Pump cam 5 volt ref
Range mode selector
Red
S129 (a/t)
S143
S180
S186
Sensor gnd
Solenoid valve 1-2 shift
Solid state
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 input shaft speed sensor (left side of transmission, near the middle)
Transmission output speed sensor (left side of trans- mission, near the middle)
Transmission speed input
Transmission temperature sensor
Vehicle speed sensor calibrator (left side of driver's island under relay bracket)
Vss out
Vss signal

6.5L VIN Y, Engine Performance Wiring Diagrams, Commercial Chassis - Electronic (2 of 4) for Chevrolet Forward Control P30 1999

List of elements for 6.5L VIN Y, Engine Performance Wiring Diagrams, Commercial Chassis - Electronic (2 of 4) for Chevrolet Forward Control P30 1999:

45

(at brake pedal support)
(eng harn, approx 14 cm from oil pressure gauge sensor breakout)
(eng harn, approx 14 cm from oil pressure gauge sensor breakout) s184
(eng harn, approx 32 cm from breakout for battery junction block) s102
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
Electronic brake control module (below radiator, on lower crossmember)
Eng-1 h6
Engine shut-off solenoid (at fuel injection pump)
F4 i-3 fuse 9 15a f3
Fuel sol high
Fuel sol low
Fuel sole- noid
Fuel solenoid driver (on side of fuel injection pump)
Fuse 15 20a
G6 ecm-1 fuse 12 20a g5
G7 stop/haz fuse 11 15a g8
High
Hot at all times
Hot in run
Hot in run or 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 assembly)
Pnk
Red
S108
S185
S222
S233
Tan d
Torque converter clutch (tcc) & stoplamps switch

6.5L VIN Y, Engine Performance Wiring Diagrams, Commercial Chassis - Electronic (3 of 4) for Chevrolet Forward Control P30 1999

List of elements for 6.5L VIN Y, Engine Performance Wiring Diagrams, Commercial Chassis - Electronic (3 of 4) for Chevrolet Forward Control P30 1999:

36

(a/t)
(eng harn, approx 24 cm from in-line connector toward fuel heater) s182
(left rear of cylinder head) g114
(m/t)
(right front of eng, near generator bracket) g119
87a
California
Ecm-bat fuse 6 20a
Eng- bat fuse 10 15a
Federal
Fuel heater (part of fuel/water separator)
Fuel lift pump (inside right frame rail)
Fuel pump prime connector (taped to fuel pump relay breakout)
Fuel pump relay (on engine firewall relay bracket, under battery junction block)
Gauges fuse 8 20a
Hot at all times
Hot in run and start
I/p fuse block
Instrument cluster
Malfunction indicator lamp (mil)
Pnk
Red
S118
S144
S171 (eng harn, approx 7 cm from breakout to a/c compressure refrigerant pressure switch connector)
S181
S206
S207
S225
Service throttle soon indicator
Speed meter
Tan
Wait to start indicator
Wastegate solenoid (top left rear of eng)
Water in fuel indicator
Water in-fuel indicator sensor (part of fuel/water separator (filter), rear of intake manifold)

6.5L VIN Y, Engine Performance Wiring Diagrams, Commercial Chassis - Electronic (4 of 4) for Chevrolet Forward Control P30 1999

List of elements for 6.5L VIN Y, Engine Performance Wiring Diagrams, Commercial Chassis - Electronic (4 of 4) for Chevrolet Forward Control P30 1999:

61

"serv throttle soon" ind
(a/t)
(a/t) (m/t)
(dlc) (partial) (below dash, near steering column)
(left rear of cylinder head) g114
(left rear of eng, near firewall) glow plug controller
(m/t)
(right front of eng, near generator bracket) g119
A/c enable
A/c system
Antilock brakes system
App 2 5 volt ref
Battery
Battery junction block) s104
C10
C11
C12
C13
C14
C15
C16
C4 a
California
D10
D11
D12
D13
D14
D15
D16
Data link connector
Eso ctrl
Federal
Fuel inject ctrl
Fusible link (22 ga rust)
G202 (left interior bulkhead, near relay bracket)
Glow plug controller (left rear of eng, near firewall)
Glow plug out
Glow plug sig
Grd
Ground
Hot at all times
Ignition
Left bank glow plugs
Mil ind ctrl
Nca
Pnk
Powertrain control module (pcm) (left side of driver's island on relay bracket)
Red
Right bank glow plugs
Rly ctrl
S143
S168 s110
S181
Serial data sig
Shift sol 1-2 input
Shift sol 2-3 input
Tan
Tcc pwm sol vlv ctrl
Wait to start ind ctrl
Wastegate sol ctrl

6.5L VIN Y, Engine Performance Wiring Diagrams, Commercial Chassis - Mechanical (1 of 3) for Chevrolet Forward Control P30 1999

List of elements for 6.5L VIN Y, Engine Performance Wiring Diagrams, Commercial Chassis - Mechanical (1 of 3) for Chevrolet Forward Control P30 1999:

82

(eng harn, approx 6cm from breakout to glowplug controller)
(rear of left cylinder head) g114
1-2 shift sol ctrl
2-3 shift sol ctrl
5v ref
A10
A11
A12
A8 a6
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 (mounted on top of steering column support at driver's island)
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 lower crossmember)
Eng speed sens in
Engine speed sensor (rear of intake manifold, near fuel filter)
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
S108
S111 (eng harn, approx 10 cm from starter motor breakout)
S119
S133
S143
S170
S200 (dash side of eng harn, approx 16 cm from left bulkhead grommet toward ignition switch)
Sensor return
Serial data
Service trans out
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) (at brake pedal support)
Tp sens sig
Transmission input speeed sensor (on left side of transmission, near the middle)
Transmission control module (tcm) (on left side of driver's island, on relay bracket)
Vehicle speed sensor (vss) (left side of transmission)
Vehicle speed sensor (vss) calibrator (left side of driver's island, under relay bracket)
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 1999

List of elements for 6.5L VIN Y, Engine Performance Wiring Diagrams, Commercial Chassis - Mechanical (2 of 3) for Chevrolet Forward Control P30 1999:

41

"wait to start" glow plugs
(a/t)
(m/t)
(rear of left cylinder head)
(rear of left cylinder head) g114
(right front of eng, near generator bracket)
(taped to fuel pump relay breakout) fuel pump prime connector
1-2 shift solenoid
2-3 shift solenoid
Automatic transmission (rear of engine)
Ecm-1 fuse 12 20a
Ecm-bat fuse 6 20a
Fuel injection pump shut-off solenoid (at fuel injection pump)
Fuel lift pump (on inside right frame rail)
Fuel pump relay (on engine firewall bracket, under battery junction block)
G114
G114 (rear of left cylinder head)
G119
Gauges fuse 8 20a
Hot at all times
Hot in run or start
I/p fuse block (behind dash panel) (body builder installed)
Instrument cluster
Nca
Orn
Pnk
Pressure control solenoid
Red
S108
S118
S143
S170
S207
S218
Service trans
Speedo meter
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 1999

List of elements for 6.5L VIN Y, Engine Performance Wiring Diagrams, Commercial Chassis - Mechanical (3 of 3) for Chevrolet Forward Control P30 1999:

55

(a/t)
(eng harn, approx 11 cm from breakout for gerator)
(m/t)
(part of fuel/water separator (filter), rear of intake manifold) water in-fuel indicator sensor
(rear of left cylinder head)
10a
A/t
Acc
Battery feed
Battery junction block (on left rear of eng compt)
Clutch pedal position (cpp) switch (closed with clutch pedal depressed) (on top of clutch pedal support)
Cold advance solenoid engine coolant temperature switch (on rear lower portion of right cylinder head, near exhaust manifold)
Crank fuse (upper right side of steering column support)
D100 (engine harn, approx 25 cm from breakout for battery junction block)
Eng-1 fuse 15 20a
Fuel heater (rear of intake manifold, part of fuel/ water separator)
Fuel injection pump cold advance solenoid (at fuel injection pump)
Fusible link (22 ga rust)
G114
G119 (right front of eng, near generator bracket)
Glow plug controller (left rear of eng, near firewall)
Glow plug ctrl
Glow plug out
Glow plug relay 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 actuator solenoid (on bracket on front fuel injection pump)
Ign feed
Ignition switch
Ind lamp out
Left bank glow plugs
Lock
M/t
Not used
Off
Park/neutral position (pnp) & back-up lamps switch (closed in park or neutral) (left side near middle of transmission)
Pnk
Red
Right bank glow plugs
Run
S stud
S109 (eng harn, approx 11 cm from breakout for fuel pump & starter relay
S110
S115
S116
S118
S168
S172 (eng harn, approx 13 cm from breakout for cold advance solenoid)
Start
Starter feed
Starter relay (on eng firewall relay bracket, under battery junction block)
Starter solenoid (on starter, at lower right side of engine)
Stud

7.4L

7.4L VIN J, Engine Performance Wiring Diagrams (1 of 4) for Chevrolet Forward Control P30 1999

List of elements for 7.4L VIN J, Engine Performance Wiring Diagrams (1 of 4) for Chevrolet Forward Control P30 1999:

54

(left side of transmission near the middle) transmission 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
Anti- lock brakes system
Camshaft position sensor (internal to distributor)
Ckp low
Cmp low
Ect signal
Egr posit input
Feed ign a pnk
Fuel gauge
G117 (right rear of eng)
Heated oxygen sensor (ho2s) bank 2 sensor 1 (on right exhaust down 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
Tan
Tan a
Tft signal
Tp signal
Vehicle control module (vcm) (comm: left side of radiator support, motor home: top of radiator support)
Vss
Vss low
Vss signal

7.4L VIN J, Engine Performance Wiring Diagrams (2 of 4) for Chevrolet Forward Control P30 1999

List of elements for 7.4L VIN J, Engine Performance Wiring Diagrams (2 of 4) for Chevrolet Forward Control P30 1999:

42

Automatic transmission
Ecm-1 fuse 12 20a
Eng-1 fuse 15 20a
Exhaust gas recirculation valve solenoid (top left side of eng)
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 (right rear of eng)
Heated oxygen sensor (ho2s) bank 1 sensor 1 (on left exhaust system down pipe, before catalytic converter)
Heated oxygen sensor (ho2s) bank 1 sensor 2 (on left exhaust system, after catalytic converter)
Heated oxygen sensor (ho2s) bank 2 sensor 2 (on right exhaust system 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 switch
Pnk pnk
Red
Red p pressure
S104
S121
S133
S135
S158
S159
Solenoid
Solenoid 1-2
Solenoid 2-3
Switch
Tan
Tan a

7.4L VIN J, Engine Performance Wiring Diagrams (3 of 4) for Chevrolet Forward Control P30 1999

List of elements for 7.4L VIN J, Engine Performance Wiring Diagrams (3 of 4) for Chevrolet Forward Control P30 1999:

36

(body builder)
(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
(left frame rail in front of fuel tank) g416
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 module (on top of fuel tank)
G117 (right rear of eng)
G119 (on top of thermostat housing)
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
Pnk
R102 (eng harn, approx 23 cm from breakout to maf & iat sensor)
Red
S119 (eng harn, 4 cm from ect & a/c compressor clutch breakout)
S120
S126
S132 (eng harn, at resistor r102, in pcm breakout, 20 cm from main harness toward fuel pump relay)
S140
S206
S211
S235
S400
Speed meter
Tach
Throttle position sensor (on throttle body, top of engine)
Trans fuse 17 10a

7.4L VIN J, Engine Performance Wiring Diagrams (4 of 4) for Chevrolet Forward Control P30 1999

List of elements for 7.4L VIN J, Engine Performance Wiring Diagrams (4 of 4) for Chevrolet Forward Control P30 1999:

82

(i/p harn, 15 cm from breakout for abs module) s170
87a
A pnk
A/c comp cyl sw
A/c rec
A/c relay
A/c request signal
Air conditioning system
Anti-lock brakes system
Aux elect cooling fan
B +
Battery feed
Brake signal
Brake/transmission shift interlock (btsi) relay (comm: behind left side of dash, on relay bracket, motor home: on top of steering support at driver's island)
Check engine lp ctrl
Cooling fans system
Cruise control module (on radiator support bracket)
Cruise ctrl engaged
Cruise engaged sig
Ctrl est
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
Evaporative emission canister purge valve (top left center of engine)
Fuel level module
Fuel pmp rly ctrl
Fuel pump prime connector (taped to fuel pump relay breakout)
Fuel pump relay (comm: on eng firewall relay bracket, behind steering column, motor home: on right side of driver's island)
G117 (right rear of eng)
G119 (on top of thermostat housing)
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 control 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
S101
S102 (eng harn, 25 cm from breakout for windshield wiper motor)
S114
S116
S126
S143
Sens ground
Sensor ground
Serial data
Signal timing ctrl elec spk
Spark plugs
Speed sensor input
Tcc stoplamp switch (opens w/brake depressed) (at brake pedal support)
Tcc/stoplamp input
Tp sig 5v ref
Transmission input speed sensor (left side of transmission, near the middle)
Vcm ground
Vehicle control module (vcm) (comm: left side of radiator support, motor home: top of radiator support)
Vss output signal

EXTERIOR LIGHTS

Back-up Lamps Wiring Diagram, Commercial Chassis for Chevrolet Forward Control P30 1999

List of elements for Back-up Lamps Wiring Diagram, Commercial Chassis for Chevrolet Forward Control P30 1999:

12

(left side of transmission) back-up lamps switch
A a
A/t
Hot in run
I/p fuse block
Left backup lamp
M/t
Park/neutral position (pnp) & backup lamp switch (left side of transmission)
Right backup lamp
S403 (rear lamps harness, 65-120 cm from inline conn, near left rear frame rail)
Turn b/u fuse 5 15a
Turn signal flasher

Back-up Lamps Wiring Diagram, Motor Home Chassis for Chevrolet Forward Control P30 1999

List of elements for Back-up Lamps Wiring Diagram, Motor Home Chassis for Chevrolet Forward Control P30 1999:

9

Hot in run
I/p fuse block
Left backup lamp
Park/neutral position (pnp) & backup lamp switch (left side of transmission)
Pnk
Provision for backup lamps
Right backup lamp
S105 (engine harn, 4 cm from heater oxygen sensor breakout)
S119

Exterior Lamps Wiring Diagram, Commercial Chassis for Chevrolet Forward Control P30 1999

List of elements for Exterior Lamps Wiring Diagram, Commercial Chassis for Chevrolet Forward Control P30 1999:

54

(dash harness headlamp switch breakout, 8 cm before i/p fuse block breakout) s208
(forward lamps harn, 25 cm from eng harn to dash harn in line conn breakout) s101
(rear lamps harness, 55-110 cm from rear chassis 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)
Engine controls system (w/ diesel)
G114 (left rear of engine)
G200 (left interior bulkhead, near relay bracket)
G416 (left rear frame rail)
Hazard
Hazard lamps flasher (on inner left side of steering column 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 lamp
Left front side marker lamp
Left license lamps
Left rear side marker lamp
Left turn ind.
Nca
Normal
Off
Park
Provision for center high mounted stop lamp
Right front park & turn signal lamp
Right front side marker lamp
Right license lamps
Right rear side marker lamp
Right tail/stop & turn signal lamps
Right turn ind.
S103
S104 (forward lamps harn, 17 cm from right lamps breakout)
S105 (forward lamps harn, 122 cm before right lamps breakout)
S218
S222
S401
S404 (rear lamps harness, 5 cm from right tail- lamps breakout)
S405 (rear lamps harness, 5 cm from left taillamps breakout)
Stop
Stop haz fuse 11 15a
Tail
Tail lamps fuse 7 20a
Tail/stop & turn signal lamps
Torque converter clutch & stop lamps switch (at base of brake pedal support)
Turn
Turn b/u fuse 5 15a
Turn left
Turn right
Turn signal flasher
Turn signal switch

Exterior Lamps Wiring Diagram, Motor Home Chassis for Chevrolet Forward Control P30 1999

List of elements for Exterior Lamps Wiring Diagram, Motor Home Chassis for Chevrolet Forward Control P30 1999:

55

(7.4l)
(forward lamp harn, 5 cm from left head- lamp breakout) s172
(forward lamp harn, 5 cm from right headlamp breakout) s176
(right rear frame rail) g417
Back-up 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 steering column support bracket)
Head
Headlamps switch
Hot at all times
Hot in run
I/p fuse block
Instrument cluster
Interior lamps system
K nca
Left front park & turn signal lamp
Left front side marker lamp
Left license lamp
Left rear side marker lamp
Left tail, stop & turn signal lamp
Left turn indic
Nca
Normal
Off
Park
Provision for center high mounted stop lamp
Provisions for marker lamps
Right front park & turn signal lamp
Right front side marker lamp
Right license lamp
Right rear side marker lamp
Right tail, stop & turn signal lamp
Right turn indic
S117 (engine harn, 7 cm from engine harn to forward lamps harn inline connector)
S126
S175 (forward lamp harn, 9 cm from right headlamp breakout)
S206
S213 (dash harness, 15 cm from headlamp switch connector)
S401
S402 (rear lamp harness, rear of vehicle)
S404 (rear lamp harness, rear of vehicle)
S405 (rear lamp harness, rear of vehicle)
Stop haz fuse 11 15a
Tail lps 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 1999

List of elements for Ground Distribution Wiring Diagram, Commercial Chassis (1 of 2) for Chevrolet Forward Control P30 1999:

52

(body builder installed)
(forward lamps harn, 4cm after first horn breakout)
(i/p harn, 4cm before i/p fuse block breakout)
(left interior bulkhead, near relay bracket)
87a
A/c compressor clutch
A/c compressor refrigerant pressure switch
A/c compressor relay
Auxilary engine coolant fan motor
Auxiliary engine coolant fan a/c pressure switch
Battery
Braided strap
Brake/ transmission shift interlock solenoid
Brake/ transmission shift interlock solenoid relay
Data link connector
Daytime running lamps control module
Daytime running lamps relay
Diesel
Electronic brake control module
Engine block
Engine coolant level switch
Fuel level sensor
Fuel pump (diesel)
Fuel pump module
G113 (left front frame rail)
G114 (rear of left cylinder head)
G200
G416 (left rear frame rail)
Gas
Gasoline
Glowplug relay (mechanical)
High note horn
I/p dimmer switch
Left headlamp
Left park/ turn signal lamp
Left side marker lamp
Low note horn
Park brake indicator switch
Right headlamp
Right park/ turn signal lamp
Right side marker lamp
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)
S406 (chassis harn, near breakout to g416)
Seat belt alarm module
Secondary battery (diesel only)
Starter relay
Steering column

Ground Distribution Wiring Diagram, Commercial Chassis (2 of 2) for Chevrolet Forward Control P30 1999

List of elements for Ground Distribution Wiring Diagram, Commercial Chassis (2 of 2) for Chevrolet Forward Control P30 1999:

50

(a/t)
(engine harn, near throttle position sensor)
(m/t)
(pcm)
(vcm)
5.7l
A/c compressor high pressure cut off switch
A/c compressor high pressure cutoff switch
A/t
A/t output speed sensor shield
Brake pressure differential switch
Data link connector
Diesel
Elec
Electronic brake control module
Firewall)
Fuel heater
Fuel pump
Fuel pump relay
Fuel pump relay (diesel)
G114 (left rear of engine)
G117 (left rear of engine)
G119 (right front of engine)
Gasoline
Glowplug controller
Glowplug controller (california)
Glowplug controller (federal)
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
Instrument cluster
M/t
Mass air flow sensor
Mech
Nca
Powertrain control module
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 control module
Vehicle speed sensor calibrator (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 1999

List of elements for Ground Distribution Wiring Diagram, Motor Home Chassis (1 of 2) for Chevrolet Forward Control P30 1999:

50

(6.5l) (7.4l)
(body builder installed)
(fwd lamp harn, near right headlamp breakout)
(fwd lamp harn, near right headlamp breakout)
6.5l
7.4l
A/c compressor high pressure cutoff switch
A/t output speed sensor shield
Battery
Braided strap
Daytime running lamp relay
Electronic brake control module
Engine block
Fuel heater (6.5l)
Fuel pump relay
G111 (near battery)
G113 (left frame rail)
G113 (left front frame rail)
G115 (near ignition coil)
G117 (rear of right cylinder head)
Glowplug controller (6.5l california)
Glowplug controller (6.5l federal)
Heated oxygen sensor bank 1 sensor 1 (7.4l)
Heated oxygen sensor bank 1 sensor 2 (7.4l)
Heated oxygen sensor bank 2 sensor 1 (7.4l)
Heated oxygen sensor bank 2 sensor 2 (7.4l)
High note horn
Ignition control module
Left headlamp
Left inner headlamp
Left outer headlamp
Low note horn
Mass air flow sensor
Park/ neutral position switch relay
Powertrain control module
R100 (near a/c compressor clutch)
Right headlamp
Right inner headlamp
Right outer headlamp
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)
S174
Secondary battery (diesel only)
Starter relay
Stop lamp resistor
Vehicle control module
W/ dual headlights
W/o drl
W/o dual headlights
Water in fuel indicator sensor (6.5l)

Ground Distribution Wiring Diagram, Motor Home Chassis (2 of 2) for Chevrolet Forward Control P30 1999

List of elements for Ground Distribution Wiring Diagram, Motor Home Chassis (2 of 2) for Chevrolet Forward Control P30 1999:

53

(6.5l)
(7.4l)
(body builder installed)
6.5l diesel
7.4l
87a
A/c compressor clutch
A/c compressor refrigerant pressure switch
Audio alarm
Auxiliary engine coolant fan a/c pressure switch
Auxiliary engine coolant fan motor
Brake pressure differential switch
Brake/ trans- mission shift interlock solenoid relay
Brake/ transmission shift interlock solenoid
Cruise control module
Data link connector
Daytime running lamps control module
Daytime running lamps relay
Electronic brake control module
Engine coolant fan motor
Engine coolant level switch
Fuel level sensor
Fuel lift pump
Fuel pump module
G116 (left side of firewall)
G125 (top of thermostat housing)
G202 (left side of dash)
G416 (left rear frame rail)
Headlamps/ panel dimmer switch
I/p dimmer switch
I/p fuse block
Inline to steering column harness
Instrument cluster
Left side marker lamp
Nca
Park brake actuator position switch
Park brake alarm relay
Park brake pressure valve solenoid
Park brake pull button relay
Park brake pump motor
Park brake pump relay
Pulse wiper control module
Right side marker lamp
S101 (engine harn, 16 cm from breakout for auxiliary coolant fan motor)
S143 (6.5l: engine harn, near coolant fan motor) (7.4l: engine harn, 5 cm from breakout to cruise control module)
S150 (engine harn, near breakout to battery junction block)
S150 (engine harn, near main wiring pass through at firewall)
S167 (in abs harness)
S204 (engine harn, near main wiring pass through at firewall)
S206 (i/p harn, 25cm from breakout to instrument panel)
S400 (in rear chassis harness)
Vechile control module (7.4l) powertrain control module (6.5l)
Vehicle speed sensor calibrator

HEADLIGHTS

Headlight Wiring Diagram, Commercial Chassis with DRL for Chevrolet Forward Control P30 1999

List of elements for Headlight Wiring Diagram, Commercial Chassis with DRL for Chevrolet Forward Control P30 1999:

45

(left rear of engine) g114
Acc
Daytime running lamps control module (attached to i/p harness)
Daytime running lamps relay (left side of dash, on relay bracket)
Diode network (on i/p harness)
Drl indicator
Fog lamps
G200 (left interior bulkhead, near battery bracket)
Gauges fuse 8 20a
Ground
Head
Headlamp dimmer switch
Headlamps switch
Hi beam indicator
Hi bm indicator
Hi bm input
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 lever)
Pnk
Provision for fog lamps
Red
Relay control
Right head- lamp
Run
S103
S143
S202 (i/p harn, approx 16cm before i/p fuse block breakout)
S204
S205
S206
S207
S257 (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 1999

List of elements for Headlight Wiring Diagram, Commercial Chassis without DRL for Chevrolet Forward Control P30 1999:

18

G114 (left rear of engine)
G200 (left interior bulkhead, near relay bracket)
Head
Headlamp
Headlamps dimmer switch
Headlamps switch
Hi beam indicator
Hot at all times
Instrument cluster
Left hi headlamp
Off
Park
Red
Right lo
S103
S206
S218
Tan

Headlight Wiring Diagram, Motor Home Chassis with Dual Headlamps with DRL for Chevrolet Forward Control P30 1999

List of elements for Headlight Wiring Diagram, Motor Home Chassis with Dual Headlamps with DRL for Chevrolet Forward Control P30 1999:

49

(body builder installed)
(forward lamps harn, 12cm to breakout for left headlamp) s171
(provision for fog lamps)
(top of thermostat housing) g125
Acc
Daytime running lamps module (attached to i/p harness)
Daytime running lamps relay (on top of steering column support)
Daytime running lamps relay 2
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 indicator
Hi bm input
Hot at all times
Hot in run or start
I/p fuse block
Ignition
Ignition switch
Instrument cluster
Lamp feed
Left head- lamp
Left high beam head- lamp
Lock
Off
Park
Park brake in
Park brake indicator switch (on park brake lever)
Pnk
Red
Relay control
Right head- lamp
Right high beam head- lamp
Run
S125
S174
S204
S206
S207 (i/p harn, 20cm from engine harn connector)
S209
S211
Start
Tan
Warning systems

Headlight Wiring Diagram, Motor Home Chassis with Dual Headlamps without DRL for Chevrolet Forward Control P30 1999

List of elements for Headlight Wiring Diagram, Motor Home Chassis with Dual Headlamps without DRL for Chevrolet Forward Control P30 1999:

21

(body builder installed)
(forward lamp harn, 12cm to breakout for left headlamp)
G125 (top of thermostat housing)
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
S174
S206
S215
Tan

Headlight Wiring Diagram, Motor Home Chassis with Single Headlamps with DRL for Chevrolet Forward Control P30 1999

List of elements for Headlight Wiring Diagram, Motor Home Chassis with Single Headlamps with DRL for Chevrolet Forward Control P30 1999:

45

(body builder installed)
(provision for fog lamps)
(top of thermostat housing) g125
Acc
Daytime running lamps module (attached to i/p harness)
Daytime running lamps relay (on top of steering column support)
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 indicator
Hi bm input
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 lever)
Pnk
Red
Relay control
Right head- lamp
Run
S125
S174
S204
S207 (i/p harn, 20cm from engine harn connector)
S209
S211
S218
Start
Tan
Warning system

Headlight Wiring Diagram, Motor Home Chassis with Single Headlamps without DRL for Chevrolet Forward Control P30 1999

List of elements for Headlight Wiring Diagram, Motor Home Chassis with Single Headlamps without DRL for Chevrolet Forward Control P30 1999:

18

(body builder installed)
G125 (top of thermostat housing)
Head
Headlamp
Headlamps dimmer switch
Headlamps switch
Hi beam indicator
Hot at all times
Instrument cluster
Left hi headlamp
Off
Park
Red
Right lo
S174
S206
S215
Tan

HORN

Horn Wiring Diagram, Commercial Chassis for Chevrolet Forward Control P30 1999

List of elements for Horn Wiring Diagram, Commercial Chassis for Chevrolet Forward Control P30 1999:

18

(behind dash panel)
(body bulder installed)
1995 vftc c
G202 (behind left side of dash)
High a note horn (body bulder installed)
Horn relay (behind left side of dash)
Horn switch
Horn/dm fuse 3 20a
Hot at all times
I/p fuse block
Low f note horn (body bulder installed)
Nca
S100 (forward lamp harness, approx 43 cm from horn breakout)
S103
S204
S205
Slip ring
Steering column

Horn Wiring Diagram, Motor Home Chassis for Chevrolet Forward Control P30 1999

List of elements for Horn Wiring Diagram, Motor Home Chassis for Chevrolet Forward Control P30 1999:

23

(behind dash panel)
1995 vftc c
C c203
Diesel only
G100 (body builder installed)
G207 (top of steering column)
High a note horn (body bulder installed)
Horn relay (behind left side of dash)
Horn switch
Horn/dm fuse 3 20a
Hot at all times
I/p fuse block (body bulder installed)
Inline connector (provisions for body builder)
Low f note horn (body bulder installed)
Nca
S100 (forward lamp harness, 27 cm from left headlamp breakout)
S101
S104
S150
S201
S234 (gas) (gas: i/p harness, 35 cm from steering column harness breakout; diesel: i/p harness, 23 cm from p100, toward turn signal switch connector)
Slip ring
Steering wheel

INSTRUMENT CLUSTER

Instrument Cluster Wiring Diagram, Commercial Chassis for Chevrolet Forward Control P30 1999

List of elements for Instrument Cluster Wiring Diagram, Commercial Chassis for Chevrolet Forward Control P30 1999:

89

(abs harn, 10 cm from 7-pin black in-line connector toward abs)
(behind left radiator support) power brake booster fluid flow indicator/alarm switch
(behind left radiator support) power brake booster pump pressure switch
(i/p harn, 24cm from
(in eng harn, approx 11 cm from a/c comp clutch breakout)
(left interior bulkhead, near relay bracket)
(left rear frame rail)
(not used)
Abs ind
Accy
Anti-lock brakes system
Brake ind
Brake pressure differential switch (internal to electronic brake conrol module)
Check gauges ind
Coolant temperature gauge
Daytime running lamp (drl) module (attached to i/p harn) (body builder installed)
Diesel
Diode network (dash harn, 15cm from i/p fuse block)
Door ajar ind
Drl ind
Ecm 1 fuse 12 20a
Electronic brake control module (ebcm) (below radiator, on lower 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 & 7.4l: on left front side of cylinder head)
Engine oil pressure gauge sensor (7.4l: on eng block, top rear, behind distributor) others: on top left rear of eng)
Exterior lights system
Fuel gauge
Fuel sender (on top of fuel tank)
G114 (left rear of engine)
G200
G416
Gas
Gauges fuse 8 20a
Hand brake
Headlights system
Headlights system
Hi beam ind
Hot in run or start
I/p fuse block (body builder installed)
I/p fuse block)
Ignition switch
Illumination
In-line connector provisions for body builder
Instrument cluster
Interior lights system
Left turn ind
Lock
Low coolant ind
Malfunction ind (mil) (service engine soon ind)
Nca
Off
Oil pressure gauge
P/b booster fluid flow alarm (taped to dash harn at breakout to dash fuse block & headlamps switch)
Park brake booster fluid flow indicator/ alarm delay module (body builder installed)
Pnk
Right turn ind
Run
S110
S116
S118
S161
S165
S169
S201 (i/p harn, 16 cm from stop lamp switch breakout)
S205
S207
S218
S257
S406
Seat belt ind
Service throttle soon ind
Speedometer
Start
Tachometer
Tan
Trans ind
Transmissions system
Vehicle control module (on left side of radiator support)
Voltmeter
Vss calibrator (left side of driver's island, under relay bracket)
W/ drl
W/o drl
Wait to start ind
Warning systems
Water in fuel ind
Water-in fuel indicator 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 1999

List of elements for Instrument Cluster Wiring Diagram, Motor Home Chassis (1 of 2) for Chevrolet Forward Control P30 1999:

69

(a/t)
(left rear frame rail)
(left side of dash)
Abs ind
Accy
Anti-lock brakes system
Auto park ind
Brake ind
Bulb test
Check gauges ind
Coolant temperature gauge
Diesel
Door ajar ind
Drl ind
Ecm 1 fuse 12 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 & 7.4l: on left front side of cylinder head)
Engine oil pressure gauge sensor (7.4l: on eng block, top rear, behind distributor) others: on top left rear of eng)
Exterior lights system
Fuel gauge
Fuel sender (on top of fuel tank)
G114 (left rear of engine)
G117 (left rear of eng)
G119 (right front of eng)
G202
G416
Gas
Gauges fuse 8 20a
Headlights system
Headlights system
Hi beam ind
Hot in run or start
I/p fuse block (behind dash panel) (body builder installed)
Ignition switch
Illumination
In-line connector provisions for body builder
Instrument cluster
Interior lights system
Left turn ind
Lock
Low coolant ind
Malfunction ind lamp (mil) (service engine soon ind)
Off
Oil pressure gauge
Pnk
Right turn ind
Run
S101
S181
S182
S206
S210
S211
S400
Seat belt ind
Service throttle soon ind
Speedometer
Start
Tachometer
Tan
Vehicle control module (on left side of radiator support)
Voltmeter
Vss calibrator (left side of driver's island, under relay bracket)
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 1999

List of elements for Instrument Cluster Wiring Diagram, Motor Home Chassis (2 of 2) for Chevrolet Forward Control P30 1999:

54

(abs harn, 10 cm from 7-pins in-line black conn breakout)
(body builder connector)
(diesel)
(eng harn, approx 11 cm from a/c compressor clutch breakout)
(gas) s230 s190
(i/p harn, approx 4 cm before i/p fuse block breakout)
(i/p harn, approx 40 cm before i/p fuse block, toward instrument cluster breakout)
(left side of dash) g202
(left side of firewall)
(mounted to dash) park brake pull button switch
(not used)
(top of ther- mostat housing)
87a
Accy
Brake pressure differential switch (internal to electronic brake conrol module)
Daytime running lamps module (attached to i/p harness0 (body builder installed)
Diode d300
Diode d301
Diode network (dash harn, 15cm from i/p fuse block)
Electronic brake control module (ebcm) (below radiator, on lower crossmember)
G115 (near ignition coil)
G116
G125
Hot at all times
Hot in run or start
I/p fuse block (behind dash panel) (body builder installed)
Ignition switch
Lock
Nca
Off
Park brake actuator position switch
Park brake alarm
Park brake alarm relay (on i/p harness) (body builder installed)
Park brake indicator switch (body builder installed)
Park brake pull button relay (on i/p harness) (body builder installed)
Park/neutral position switch relay (on right side of driver's island)
Pnk
Red
Run
S135
S165
S167
S169
S203 (dash harn, 76cm from fuse block)
S204
S205
S207
S212
S363
S364
Shift interlock system
Start
W/ drl
W/o drl

INTERIOR LIGHTS

Interior Light Wiring Diagram, Commercial Chassis for Chevrolet Forward Control P30 1999

List of elements for Interior Light Wiring Diagram, Commercial Chassis for Chevrolet Forward Control P30 1999:

29

(6)
(left interior bulkhead, near relay bracket) g200
Breakout)
C207
Dim
Dome lamp switch
Exterior lights system
G114 (left rear of engine)
Head
Headlamps switch
High
Horn dim fuse 3 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
Provision for dome lamp
Provision for marker lamps
S204
S205
S218
Seat belt alarm module (attached to i/p fuse block)
Tail lps fuse 7 20a
Transmission range indicator lamp

Interior Light Wiring Diagram, Motor Home Chassis for Chevrolet Forward Control P30 1999

List of elements for Interior Light Wiring Diagram, Motor Home Chassis for Chevrolet Forward Control P30 1999:

30

(6)
(dash harn, 15 cm from head- lamp switch conn)
(left side of dash) g202
Dim
Dome lamp switch
Exterior lights system
G125 (top of thermostat housing)
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
Provision for dome b
Provision for roof marker lamps
S201
S204
S206
S213
Seat belt alarm module (attached to i/p fuse block)
Tail lps fuse 7 20a
Transmission range lamp

POWER DISTRIBUTION

Power Distribution Wiring Diagram, Commercial Chassis (1 of 4) for Chevrolet Forward Control P30 1999

List of elements for Power Distribution Wiring Diagram, Commercial Chassis (1 of 4) for Chevrolet Forward Control P30 1999:

51

(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 relay
A12
Accessory junction block (left interior bulkhead, near relay bracket)
Auxiliary engine coolant fan relay (diesel only)
B a8
B b8
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
Fuel pump relay
Fusible link (10 ga- rust)
Gas
Generator
Glow plug controller (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 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 1999

List of elements for Power Distribution Wiring Diagram, Commercial Chassis (2 of 4) for Chevrolet Forward Control P30 1999:

54

(4.3l)
(engine harness, approx 5 cm from right glowplug breakout) s116
(engine harness, approx 18 cm from right engine breakout)
(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
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)
Clutch pedal position switch
Cold advance solenoid and engine coolant temperature switch
Crank fuse 18 10a
Crk (start)
Diesel
Eng-1 fuse 15 20a
Engine shut-off solenoid
Evap canister vent valve (4.3l)
Evaporative emissions canister purge valve
From fusible link (diagram 1 of 4)
Fuel heater
Fuel solenoid driver
Gas
Glow plug 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
I/p fuse block (dash panel provided by body builder)
Ignition switch
In-line fuse block (near right side of steering column)
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
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 1999

List of elements for Power Distribution Wiring Diagram, Commercial Chassis (3 of 4) for Chevrolet Forward Control P30 1999:

16

(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
(engine harness, near ignition control module)
4.3l vin w
5.7l vin r
Crankshaft position sensor
Ecm-1 fuse 12 20a
From eng-1 fuse (diagram 2 of 4)
Fuel injector
I/p fuse block (dash panel provided by body builder)
Ignition coil
Ignition control module
Instrument cluster
Pnk
S145
Vehicle control module

Power Distribution Wiring Diagram, Commercial Chassis (4 of 4) for Chevrolet Forward Control P30 1999

List of elements for Power Distribution Wiring Diagram, Commercial Chassis (4 of 4) for Chevrolet Forward Control P30 1999:

60

(diesel assembly harn, near fuel heater)
(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 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
From breakout to steering column connector) s132
From eng 1 fuse (diagram 2 of 4)
From ignition switch (diagram 2 of 4)
Fuel heater
Fuel injection pump shut-off solenoid
Fuel pump relay (mech)
Gas
Gauges fuse 8 20a
Generator
Glow plug controller (calif)
Glow plug controller (federal)
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
S182
S207
Seat belts 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 calibrator
Water in fuel indicator sensor

Power Distribution Wiring Diagram, Motor Home Chassis (1 of 4) for Chevrolet Forward Control P30 1999

List of elements for Power Distribution Wiring Diagram, Motor Home Chassis (1 of 4) for Chevrolet Forward Control P30 1999:

48

(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, near bulkhead connector)
(i/p harness, 10 cm from breakout for i/p fuse block)
6.5l vin f
7.4l
7.4l vin j
A/c compressor relay
Alternator
Battery
Battery junction block (on forward left side of the bulkhead)
Buss bar
C13
Connector for dome lamp
D13
Data link connector
Diesel
Ecm- bat fuse 6 20a
Electronic brake control module
Eng- bat fuse 10 15a
Fan control relay
Fuel pump relay
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)
Park brake pump motor relay
Powertrain control module
Pwr circuit breaker 2 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)
S201
S215 (i/p harness, 35 cm from i/p fuse block)
S235
Seatbelt and lamps alarm module
Secondary battery (diesel only)
Starter motor
Starter relay
Stop- haz 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 1999

List of elements for Power Distribution Wiring Diagram, Motor Home Chassis (2 of 4) for Chevrolet Forward Control P30 1999:

64

(7.4l: eng harn, 58cm from main passthrough 6.5l: eng harn, 7.5cm from a/c harn breakout)
(engine harn, 11 cm from break- out to a/c compressor clutch)
(engine harn, 15 cm from breakout to abs conn) pnk
(i/p harn, 20cm from relay sockets) s207
(i/p harn, 25cm from fuse panel) s157
(i/p harn, 25cm from instrument cluster breakout)
(i/p harn, 6cm from dimmer switch)
6.5l vin f
7.4l vin j
Acc
Acc radio fuse 4 10a
Automatic transmission
Camshaft position sensor
Crank fuse 18 10a
Daytime running lamp control module
Diesel
Diode network
Eng-1 fuse 20a
Engine coolant level switch
Engine shut off solenoid
Evaporative emissions canister purge valve solenoid
Fan control relay
From fusible link (diagram 1 of 4)
Fuel solenoid driver
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 alarm
Park brake alarm relay
Park brake low pressure indicator switch
Park brake pull button relay
Park brake pull button switch
Park brake switch
Park/ neutral position and backup lamps switch
Park/neutral position and backup lamps switch
Pnk
Pnk a
Pnk a1
Pnk c
Red
Run
S104
S133
S169
S185 (diesel assy harn, 14 cm from oil pressure gauge sensor breakout)
S206
S212
S217 (i/p harn, 18cm from i/p fuse block)
S228 (engine harn, 28 cm from bulkhead grommet)
Start
To aux fuse (diagram 4 of 4)
To gauges fuse (diagram 4 of 4)
Trans fuse 17 10a
Windshield
Wiper fuse 14 25a
Wiper motor

Power Distribution Wiring Diagram, Motor Home Chassis (3 of 4) for Chevrolet Forward Control P30 1999

List of elements for Power Distribution Wiring Diagram, Motor Home Chassis (3 of 4) for Chevrolet Forward Control P30 1999:

29

(6.5l-engine harness, 16cm from bulkhead grommet) s121
(diesel assy harness, near fuel heater)
(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
7.4l vin j
C11
C12
California
Crankshaft position sensor
Ecm-1 fuse 12 20a
Federal
From gauges fuse diagram 4 of 4)
Fuel heater
Glowplug controller
I/p fuse block (mounted on the dash)
Ignition coil
Ignition control module
Injector
Instrument cluster
Pnk
Powertrain control module
S121
S182
Vehicle control module
Vehicle speed sensor calibrator
Wastegate solenoid
Water in fuel indicator sensor

Power Distribution Wiring Diagram, Motor Home Chassis (4 of 4) for Chevrolet Forward Control P30 1999

List of elements for Power Distribution Wiring Diagram, Motor Home Chassis (4 of 4) for Chevrolet Forward Control P30 1999:

34

(7.4l-engine harness, 52 cm from breakout for map sensor, 6.5l-engine harness, 33 cm from breakout for windshield wiper switch) s116 (gas) s229 (diesel)
(engine harness, 34cm from windshield wiper motor breakout) s115
(i/p harness, 6 cm from breakout for dimmer switch) s211
1996 vftc c
7.4l vin j engine
7.4l vin j engines
A/c compressor relay
Aux circuit breaker 13 30a
Buss bar
Canadian models
Cruise control module
Cruise control switch
Daytime running lamp control module
Daytime running lamp 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
Generator
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)
Nca
Pnk
Seatbelt/ lamps alarm module
To ecm 1 fuse diagram 3 of 4)
Torque converter clutch and stop lamps switch
Turn b/u fuse 5 15a
Turn signal flasher
Vehicle control module

SHIFT INTERLOCKS

Shift Interlock Wiring Diagram for Chevrolet Forward Control P30 1999

List of elements for Shift Interlock Wiring Diagram for Chevrolet Forward Control P30 1999:

18

Body builder installed
Brake/transmission shift interlock (btsi) relay (top of support bracket, at driver's island)
Brake/transmission shift interlock (btsi) solenoid (on steering column)
Electronic brake control module (below radiator on crossmember)
Hot in run
Hot in run and start
I-3 fuse 9 15a
I/p fuse block
Park/neutral position and backup lamps switch (left of trans)
Pnk
S101
S116
S150
S200 (dash side of eng harn, approx 17 cm from grommet left of bulkhead conn)
S212
S231
To body builder harness
Torque converter clutch and stop lamps switch (at brake pedal support)

STARTING/CHARGING

Charging Wiring Diagram for Chevrolet Forward Control P30 1999

List of elements for Charging Wiring Diagram for Chevrolet Forward Control P30 1999:

22

(124a, 145a) c f
(base)
(commercial) (motor home)
(gasoline) (diesel)
A p
Bat bat
Battery
D s
Fusible link (10 ga- rust)
G117 (rear of right cylinder head)
Gauges fuse 20a
Generator
Hot in run and start
I/p fuse block
Instrument cluster tach (diesel)
Pnk
Power distribution system
Red
S112 s125
S132 s115
Secondary battery (diesel)
Starter solenoid

Starting Wiring Diagram, Commercial Chassis for Chevrolet Forward Control P30 1999

List of elements for Starting Wiring Diagram, Commercial Chassis for Chevrolet Forward Control P30 1999:

34

A/t
Accy
Battery
Battery junction block (left rear of engine compt)
Bulb test
Charging circuit
Clutch pedal position switch (top of clutch pedal support)
Crank fuse 18 10a
Diesel
Engine controls (glow plugs)
Fusible link (10 ga- rust)
G114 (left rear cylinder head)
G117 (rear of right cylinder head)
G200 (left kick panel, near relay bracket)
Gas
Hold- in coil
I/p fuse block (behind dash panel)
Ignition switch
Lock
M/t
Off
Park/ neutral position & back-up lamps switch (left side of transmission)
Pull- in coil
Red
Run
S09 (diesel)
S110
S112
S118
Secondary battery (diesel)
Start
Starter motor
Starter relay (on engine firewall relay bracket)
Starter solenoid

Starting Wiring Diagram, Motor Home Chassis for Chevrolet Forward Control P30 1999

List of elements for Starting Wiring Diagram, Motor Home Chassis for Chevrolet Forward Control P30 1999:

24

Accy
Battery
Battery junction block (left rear of engine compt)
Bulb test
Charging circuit
Crank fuse 18 10a
Fusible link (10 ga- rust)
G117 (rear of right cylinder head)
Hold- in coil
I/p fuse block (behind dash panel)
Ignition switch
Lock
Off
Park/ neutral position & back-up lamps switch (left side of transmission)
Pull- in coil
Red
Run
S125
S135
Secondary battery (diesel)
Start
Starter motor
Starter relay (right side of driver's island support)
Starter solenoid

TRANSMISSION

4.3L

4.3L VIN W, A/T Wiring Diagram for Chevrolet Forward Control P30 1999

List of elements for 4.3L VIN W, A/T Wiring Diagram for Chevrolet Forward Control P30 1999:

79

(4.3l/5.7l: engine harn, 18 cm from left firewall grommet) (7.4l: dash harn, 15 cm from breakout to abs module)
(4.3l/5.7l: engine harn, 19 cm from breakout to left firewall grommet) (7.4l: engine harn, 25 cm from breakout to wiper motor)
(4.3l/5.7l: engine harn, 8 cm from breakout to ect sensor) (7.4l: engine harn, 4 cm from breakout to ground g117)
(mil)
(rear of left clinder head) g114 g117 (right rear of engine)
(rear of left clinder head) g114 g119 (on top of thermostat housing)
1-2 shift
1-2 shift sol
2-3 shift sol
2-3 shift solenoid
4.3l (vin w), 5.7l (vin r)
5v reference
7.4l (vin j)
A/c compressor relay, generator, seat belt/ headlamps alarm module
A/t fluid pressure manual valve position switch
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
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
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
S119 (engine harn, near breakout to ect sensor)
S126
S133 s116
S134 s114
S135
S138
S143
S150
S170
S200 s102
S207 s211
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 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, A/T Wiring Diagram for Chevrolet Forward Control P30 1999

List of elements for 5.7L VIN R, A/T Wiring Diagram for Chevrolet Forward Control P30 1999:

79

(4.3l/5.7l: engine harn, 18 cm from left firewall grommet) (7.4l: dash harn, 15 cm from breakout to abs module)
(4.3l/5.7l: engine harn, 19 cm from breakout to left firewall grommet) (7.4l: engine harn, 25 cm from breakout to wiper motor)
(4.3l/5.7l: engine harn, 8 cm from breakout to ect sensor) (7.4l: engine harn, 4 cm from breakout to ground g117)
(mil)
(rear of left clinder head) g114 g117 (right rear of engine)
(rear of left clinder head) g114 g119 (on top of thermostat housing)
1-2 shift
1-2 shift sol
2-3 shift sol
2-3 shift solenoid
4.3l (vin w), 5.7l (vin r)
5v reference
7.4l (vin j)
A/c compressor relay, generator, seat belt/ headlamps alarm module
A/t fluid pressure manual valve position switch
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
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
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
S119 (engine harn, near breakout to ect sensor)
S126
S133 s116
S134 s114
S135
S138
S143
S150
S170
S200 s102
S207 s211
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 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, A/T Wiring Diagram for Chevrolet Forward Control P30 1999

List of elements for 6.5L VIN F, A/T Wiring Diagram for Chevrolet Forward Control P30 1999:

91

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 & turbo charger power valve
A/t fluid pressure manual valve position switch
A/t input speed sensor (left side of transmission)
A/t iss sens hi in
A/t iss sens lo in
A/t output speed sensor (left side of transmission)
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
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 brake control module
Engine coolant temperature sensor (top front of engine)
Exterior lights
Fuel pump relay & fuel pump switch/engine oil pressure indicator sensor
G119 (top of thermostat housing)
Gauges fuse 8 20a
Hazard lamps flasher
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
Oss hi in
Oss in
Oss lo in
Oss out
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, 13 cm from ground g117)
S143
S200 (eng harn, dash side near ignition switch)
S202 (dash harn, 7 cm from breakout to wiper switch)
S211
S224 (engine harn, 16 cm from left bulkhead grommet)
S229
S232
Sensor ground
Service engine soon (mil)
Solenoid
Stop-haz fuse 11 15a
Stoplamp switch in
Tan
Tft sensor in
Torque converter clutch & stoplamp switch
Trans fluid temp sensor
Trans range "a"
Trans range "b"
Trans range "c"
Transmission fuse 17 10a
Vehicle speed sensor calibrator & engine shutoff solenoid
Vehicle speed sensor calibrator (left side of driver's island)
Vss in
Vss out

6.5L VIN Y, A/T Wiring Diagram, with Electronic Engine Controls for Chevrolet Forward Control P30 1999

List of elements for 6.5L VIN Y, A/T Wiring Diagram, with Electronic Engine Controls for Chevrolet Forward Control P30 1999:

88

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 fluid pressure manual valve position switch
A/t input speed sensor (left side of transmission)
A/t iss sens hi in
A/t iss sens lo in
A/t output speed sensor (left side of transmission)
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
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 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
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
Oss hi in
Oss lo in
Oss out
Pcm ground
Pcs sol hi out
Pcs sol lo out
Pnk
Powertrain control module (left side of driver's island)
Press ctrl solenoid
Red
S102 (engine harn, 32 cm from breakout to battery junction block)
S104 (engine harn, 25 cm from breakout to battery junction block)
S108
S129 (engine harn, 17 cm from breakout for inline connector toward left bulkhead grommet)
S143
S207
S222
S225
S233
Sensor ground
Service engine soon (mil)
Solenoid
Stop-haz fuse 11 15a
Stoplamp switch in
Tan
Tft sensor in
Torque converter clutch & stoplamp switch
Trans fluid temp sensor
Trans range "a"
Trans range "b"
Trans range "c"
Transmission fuse 17 10a
Vehicle speed sensor buffer
Vehicle speed sensor calibrator (left side of driver's island)
Vss lo in
Vss out

6.5L VIN Y, A/T Wiring Diagram, without Electronic Engine Controls for Chevrolet Forward Control P30 1999

List of elements for 6.5L VIN Y, A/T Wiring Diagram, without Electronic Engine Controls for Chevrolet Forward Control P30 1999:

95

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 shaft speed sensor (left side of transmission)
A/t output shaft speed sensor (left 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 (rear of intake manifold)
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
Oss inputs
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 ind
Service transmission indicator
System ground
Tan
Tcc pwm control
Tcc pwm sol
Throttle position sensor (right side of fuel injection pump)
Torque converter clutch/ stoplamp switch
Tp sensor input
Trans fluid temp sig
Trans fuse 17 10a
Transmission control module (left side of driver's island)
Transmission temperature sensor
Vehicle spd output
Vehicle speed input
Vehicle speed sensor calibrator

7.4L

7.4L VIN J, A/T Wiring Diagram for Chevrolet Forward Control P30 1999

List of elements for 7.4L VIN J, A/T Wiring Diagram for Chevrolet Forward Control P30 1999:

79

(4.3l/5.7l: engine harn, 18 cm from left firewall grommet) (7.4l: dash harn, 15 cm from breakout to abs module)
(4.3l/5.7l: engine harn, 19 cm from breakout to left firewall grommet) (7.4l: engine harn, 25 cm from breakout to wiper motor)
(4.3l/5.7l: engine harn, 8 cm from breakout to ect sensor) (7.4l: engine harn, 4 cm from breakout to ground g117)
(mil)
(rear of left clinder head) g114 g117 (right rear of engine)
(rear of left clinder head) g114 g119 (on top of thermostat housing)
1-2 shift
1-2 shift sol
2-3 shift sol
2-3 shift solenoid
4.3l (vin w), 5.7l (vin r)
5v reference
7.4l (vin j)
A/c compressor relay, generator, seat belt/ headlamps alarm module
A/t fluid pressure manual valve position switch
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
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
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
S119 (engine harn, near breakout to ect sensor)
S126
S133 s116
S134 s114
S135
S138
S143
S150
S170
S200 s102
S207 s211
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 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 1999

List of elements for Warning System Wiring Diagrams, Commercial Chassis for Chevrolet Forward Control P30 1999:

22

Bulkhead, near relay bracket)
G200 (left interior
Gauges fuse 8 20a
Ground
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 belts alarm module (at the bottom of the i/p fuse block)

Warning System Wiring Diagrams, Motor Home Chassis for Chevrolet Forward Control P30 1999

List of elements for Warning System Wiring Diagrams, Motor Home Chassis for Chevrolet Forward Control P30 1999:

22

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)
S201
S204
S211
S214
Seat belt switch
Seat belt tell tale
Seat belt/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 1999

List of elements for Provisions For Front Wiper/Washer Wiring Diagram, Commercial Chassis for Chevrolet Forward Control P30 1999:

13

(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 1999

List of elements for Provisions For Front Wiper/Washer Wiring Diagram, Motor Home Chassis for Chevrolet Forward Control P30 1999:

20

(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