POWER DISTRIBUTION – Chevrolet Forward Control P12 1998 – SYSTEM WIRING DIAGRAMS

POWER DISTRIBUTION

Power Distribution Wiring Diagram, Commercial Chassis (1 of 4) for Chevrolet Forward Control P12 1998

List of elements for Power Distribution Wiring Diagram, Commercial Chassis (1 of 4) for Chevrolet Forward Control P12 1998:

• (105a)
• (diesel a/t-engine harness, approx 19 cm from a/c compresssor clutch relay, others-engine harness, approx 11 cm from steering column connector breakout) s144
• (diesel-engine harness, 4-16 cm from starter motor breakout, gasoline-engine harness, 7 cm from generator jumper breakout) s112
• (i/p harness, approx 20 cm from fuse block breakout) s204
• (others)
• A/c compressor clutch relay
• A12
• Accessory junction block (left interior bulkhead, near relay bracket)
• Auxiliary engine coolant fan relay (diesel only)
• Batt bus
• Battery
• Battery junction block (left side of engine bulkhead)
• C13
• D13
• Data link connector
• Diesel
• Dome lamp (provisions for)
• Ecm- bat fuse 6 20a
• Electronic brake control module
• Eng- bat fuse 10 15a
• Engine pressure indicator sensor
• Fuel pump relay
• Fusible link (18 ga. rust)
• Fusible link 10 ga. rust
• Gas
• Generator
• Glow plug control module (diesel)
• Hazard lamp flasher
• Headlamps switch
• Horn relay
• Horn/ dm fuse 3 20a
• I/p fuse block (dash panel provided by body builder)
• Powertrain control module
• Pwr bus
• Pwr circuit breaker 30a
• Red
• Remote battery access terminal block (rear of right radiator core support panel)
• S134
• S206 (i/p harness, approx 12 cm before dash fuse block breakout)
• Seat belt/ lamps alarm module
• Secondary battery (diesel only)
• Starter relay
• Starter solenoid
• Stop- haz fuse 11 15a
• Stud
• Tail lps fuse 7 20a
• To ignition switch (diagram 2 of 4)
• Torque converter clutch & stoplamps switch
• Transmission control module (a/t only)
• Vehicle control module
• W/deluxe school bus option

Power Distribution Wiring Diagram, Commercial Chassis (2 of 4) for Chevrolet Forward Control P12 1998

List of elements for Power Distribution Wiring Diagram, Commercial Chassis (2 of 4) for Chevrolet Forward Control P12 1998:

• (elec)
• (engine harness, approx 18 cm from right engine breakout)
• (engine harness, approx 5 cm from right glowplug breakout) s116
• (engine harness, approx 6 cm before mass air flow sensor breakout) s116
• (i/p harness, approx 15 cm after i/p fuse block breakout) s211
• (mech)
• A a6
• A b6
• A c6
• A d6
• A/t
• Acc
• Acc bus
• Acc radio fuse 4 10a
• Automatic transmission
• Auxiliary engine coolant fan relay
• Camshaft position sensor (4.3l)
• Camshaft position sensor (5.7l)
• Canister vent sensor (4.3l)
• Canister vent sensor (5.7l)
• Clutch pedal position switch
• Cold advance solenoid and engine coolant temperature switch
• Crank fuse 10a
• Crk (start)
• Diesel
• Eng-1 fuse 15 20a
• Evaporative emissions canister purge valve solenoid
• From fusible link (diagram 1 of 4)
• Fuel heater
• Gas
• Glow plug control switch
• I/p fuse block (dash panel provided by body builder)
• Ignition switch
• In-line fuse block (near right side of steering column)
• Left post oxygen sensor (5.7l/ 4.3l
• Left pre- heated oxygen sensor (4.3l/ 5.7l)
• Lock
• M/t
• Mass air flow sensor (4.3l/ 5.7l)
• Off
• On (run)
• Park/neutral position and backup lamps switch
• Pnk
• Provisions for windshield washer motor
• Red
• Right post oxygen sensor (5.7l)
• Right pre- heated oxygen sensor (4.3l/ 5.7l)
• S139
• To ecm-1 fuse (diagram 3 of 4 and diagram 4 of 4)
• To i/p fuse block: (diagram 4 of 4)
• Trans fuse 17 10a
• Water- in-fuel indicator sensor
• Windshield wiper & washer switch
• Wiper fuse 14 25a

Power Distribution Wiring Diagram, Commercial Chassis (3 of 4) for Chevrolet Forward Control P12 1998

List of elements for Power Distribution Wiring Diagram, Commercial Chassis (3 of 4) for Chevrolet Forward Control P12 1998:

• (engine harness, 9cm from breakout to right oxygen sensor) s108
• (engine harness, approx 10 cm from breakout to right side of engine crossover harness) s108
• 4.3l vin w
• 5.7l vin r
• Crankshaft position sensor
• Ecm-1 fuse 12 20a
• Electronic ignition control module
• From eng-1 fuse (diagram 2 of 4)
• Fuel injector
• I/p fuse block (dash panel provided by body builder)
• Ignition coil
• Instrument cluster
• Pnk
• S145
• Vehicle control module

Power Distribution Wiring Diagram, Commercial Chassis (4 of 4) for Chevrolet Forward Control P12 1998

List of elements for Power Distribution Wiring Diagram, Commercial Chassis (4 of 4) for Chevrolet Forward Control P12 1998:

• (engine harness, 8cm from vcm breakout) s133
• (engine harness, approx 19 cm pnk
• (engine harness, approx 26 cm from bulkhead grommet)
• (i/p harness, approx 40 cm before i/p fuse block breakout)
• 105a
• 1996 vftc c
• 6.5l engine
• A/c compressor clutch relay
• A/t
• Aux circuit breaker 13 30a
• Aux fuse 30a
• Back up lamps switch
• C11
• C12
• C16
• Daytime running lamp relay
• Daytime running lamps control module
• Diesel
• Ecm-1 fuse 12 20a
• Electronic brake control module
• Engine controls
• From breakout to steering column connector) s132
• From eng 1 fuse (diagram 2 of 4)
• From ignition switch (diagram 2 of 4)
• Fuel injection pump fuel shut-off solenoid
• Fuel injection pump shut-off solenoid
• Fuel pump relay (mech)
• Gas
• Gauges fuse 8 20a
• Generator
• Htr bus
• Htr fuse 1 25a
• I a4
• I b4
• I c4
• I-3 fuse 9 15a
• I/p fuse block (dash panel provided by body builder)
• Ign bus
• Instrument cluster
• Instrument lamps fuse 5a
• Interior lights system
• Interior lights system (i/p lamps dimmer switch)
• M/t
• Others
• Park/ neutral position and backup lamps switch
• Pnk
• Powertrain control module (elec)
• S108
• S207
• Seat belts lamp alarm module
• Torque converter clutch & stop lamps switch
• Transmission control module (a/t)
• Turn signal flasher
• Turn- b/u fuse 5 15a
• Vehicle control module (vcm)
• Vehicle speed sensor (a/t)
• Vehicle speed sensor (vss) buffer

Power Distribution Wiring Diagram, Motor Home Chassis (1 of 4) for Chevrolet Forward Control P12 1998

List of elements for Power Distribution Wiring Diagram, Motor Home Chassis (1 of 4) for Chevrolet Forward Control P12 1998:

• (6.5l) (7.4l)
• (7.4l vin j-engine harness, 44 cm from breakout for left wheel speed sensor, 6.5l-engine harness, 20 cm from breakout of main harness)
• (i/p harn, 15cm from bulkhead connector)
• (i/p harness, 6 cm from breakout for headlamp switch)
• 6.5l vin f
• 7.4l
• 7.4l vin j
• A/c compressor relay
• Alternator
• Auxiliary fan control relay
• Battery
• Battery junction block (on forward left side of the bulkhead)
• Buss bar
• C d
• C13
• D13
• Data link connector
• Diesel
• Dome lamp
• Ecm- bat fuse 6 20a
• Electronic brake control module
• Eng- bat fuse 10 15a
• Fan control relay
• Fuel pump relay
• Fuel pump switch and oil pressure gauge
• Fusible link (10 ga. red)
• Fusible link (10 ga. rust)
• Glow plug controller
• Hazard flasher
• Headlamps switch
• Horn relay
• Horn/ dm fuse 3 20a
• I/p fuse block (mounted on the dash)
• Ignition switch (diagram 2 of 4)
• Powertrain control module
• Pwr circuit breaker 30a
• Red
• Red a
• S114
• S125 (7.4l-engine harness 5 cm from breakout for egr 6.5l-engine harness, 9 cm from breakout for generator)
• S141
• S153
• S156 (i/p harness, 35 cm from fuse panel)
• Seatbelts/ lamps alarm module
• Secondary battery (diesel only)
• Starter motor
• Starter relay
• Stop- haz lps fuse 11 15a
• Stoplamp switch
• Tail lamps fuse 7 20a
• Vehicle control module

Power Distribution Wiring Diagram, Motor Home Chassis (2 of 4) for Chevrolet Forward Control P12 1998

List of elements for Power Distribution Wiring Diagram, Motor Home Chassis (2 of 4) for Chevrolet Forward Control P12 1998:

• (7.4l-eng harn, 58cm from main passthrough 6.5l-eng harn, 7.5cm from a/c harn breakout)
• (i/p harn, 25cm from fuse panel) s157
• (i/p harn, 25cm from instrument cluster breakout)
• (i/p harn, 54cm from fuse block)
• (i/p harn, 70cm from i/p fuse block) s162
• 6.5l vin f
• 7.4l vin j
• Acc
• Acc radio fuse 4 10a
• Automatic transmission
• Auxiliary fan control relay
• Camshaft position sensor
• Crank fuse 18 10a
• Daytime running lamp control module
• Diesel
• Diode network
• Eng-1 fuse 20a
• Engine coolant level switch
• Engine harness, 10 cm from breakout for ignition coil) s133
• Engine harness, 12cm from breakout for glow plug control) s128
• Evaporative emissions canister purge valve solenoid
• From fusible link (diagram 1 of 4)
• Fuel heater
• Glow plug control
• Heated oxygen sensor bank 1 sensor 1
• Heated oxygen sensor bank 1 sensor 2
• Heated oxygen sensor bank 2 sensor 1
• Heated oxygen sensor bank 2 sensor 2
• I/p fuse block (mounted on the dash)
• Ignition switch
• Instrument cluster
• Lock
• Mass air flow sensor
• Nca
• Off
• Park brake actuator position switch relay
• Park brake alarm
• Park brake switch
• Park low pressure switch
• Park/neutral position and backup lamps switch
• Pnk
• Pnk a
• Pnk a1
• Pull button park brake switch
• Pull button relay
• Red
• Run
• S161 (i/p harn, 18cm from fuse panel)
• S165
• Start
• To aux fuse (diagram 4 of 4)
• To gauges fuse (diagram 4 of 4)
• Trans fuse 17 10a
• Water in-fuel indicator sensor
• Wiper fuse 14 25a
• Wiper motor

Power Distribution Wiring Diagram, Motor Home Chassis (3 of 4) for Chevrolet Forward Control P12 1998

List of elements for Power Distribution Wiring Diagram, Motor Home Chassis (3 of 4) for Chevrolet Forward Control P12 1998:

• (engine harness, 28 cm from breakout for injectors)
• (fuel injector harness, 7 cm from breakout for injector 5) s158
• (fuel injector harness, 7 cm from breakout for injector 5) s159
• 6.5l vin f
• 6.5l-engine harness, 16cm from bulkhead grommet) s121
• 7.4l vin j
• C11
• C12
• Crankshaft position sensor
• Ecm-1 fuse 20a
• Electronic ignition control module
• Engine shut-off solenoid
• From gauges fuse diagram 4 of 4)
• I/p fuse block (mounted on the dash)
• Ignition coil
• Injector
• Instrument cluster
• Pnk
• Powertrain control module
• S121
• Vehicle control module
• Vehicle speed sensor calibrator

Power Distribution Wiring Diagram, Motor Home Chassis (4 of 4) for Chevrolet Forward Control P12 1998

List of elements for Power Distribution Wiring Diagram, Motor Home Chassis (4 of 4) for Chevrolet Forward Control P12 1998:

• (7.4l-engine harness, 52 cm from breakout for map sensor, 6.5l-engine harness, 33 cm from breakout for windshield wiper switch) s116
• (engine harness, 34cm from windshield wiper motor breakout) s115
• (i/p harness, 12 cm from breakout for headlamp switch) s154
• 1996 vftc c
• 6.5l vin f engine only
• 7.4l vin j engine
• 7.4l vin j engines
• A/c compressor relay
• Alternator
• Aux circuit breaker 30a
• Body builder circuit breaker
• Buss bar
• Canadian models
• Cruise control module
• Cruise control switch
• Daytime running lamps control module
• Daytime running lamps control relay
• Electronic brake control module
• From eng-1 fuse d (diagram 2 of 4)
• From ignition switch (diagram 2 of 4)
• Gauges fuse 8 20a
• Htr fuse 1 25a
• I-3 fuse 9 15a
• I/p fuse block (mounted on the dash)
• Instr- lps fuse 16 5a
• Instrument cluster
• Interior lights system
• Interior lights system (instrument panel dimmer switch)
• Park/neutral position & backup switch
• Pnk
• Seatbelts/ lamps alarm module
• Steering column harness
• Stoplamp torque converter clutch switch
• To ecm 1 fuse diagram 3 of 4)
• Turbo charger power valve solenoid
• Turn b/u fuse 5 15a
• Turn signal flasher
• Vehicle control module