GM Service Manual Online
For 1990-2009 cars only
Makes 🢒 GMC_Truck 🢒 1998 🢒 GMC P42 Commercial Chassis 🢒 Engine 🢒 Engine Electrical 🢒 Lighting Systems Component Views

Lighting Systems Component Views P32

Figure 1:

Radiator Support Wiring (L65)
Object Number: 186179 Size: MF
(1)C203
(2)Torque Converter Clutch (TCC) and Stoplamps Switch
(3)Vehicle Speed Sensor (VSS) Calibrator
(4)Accelerator Pedal Position Module (APP) (Part of Accelerator Pedal Assembly)
(5)Engine Coolant Level Switch
(6)Auxiliary Engine Coolant Fan A/C Pressure Switch
(7)Starter Relay
(8)Brake Pressure Differential Switch
(9)A/C Compressor Relay
(10)Fuel Pump Relay
(11)Park/Neutral Position (PNP) Switch Relay
(12)Stoplamps Switch
Figure 2:

Dash and Steering Column
Object Number: 364655 Size: MF
(1)C203
(2)Brake Pedal Bracket
(3)Stoplamps Switch
(4)Torque Converter Clutch (TCC) and Stoplamps Switch
(5)Turn Signal Switch Connector
Figure 3:

Engine Wiring Harness to Dash and Steering Column
Object Number: 186174 Size: MF
(1)Turn Signal Switch Connector
(2)Headlamps Dimmer Switch
(3)Data Link Connector (DLC)
(4)Powertrain Control Module (Diesel)
(5)Ignition Switch
(6)Brake Transmission Shift Interlock (BTSI) Solenoid
(7)Daytime Running Lamps (DRL) Relay
(7)Daytime Running Lamps (DRL) Relay
(8)Horn Relay
(8)Horn Relay
(9)Brake Transmission Shift Interlock (BTSI) Relay
(10)Fan Control Relay
Figure 4:

Steering Column
Object Number: 329566 Size: SF
(1)Hazard Lamps Flasher Switch
(2)Transmission Range (TR) Lamp
(3)Multifunction Lever
(4)Turn Signal Switch Connector
(5)Cruise Control Switch Connector (P32)
(6)Wiper Switch Connector
Figure 5:

Engine And Transmission Harness
Object Number: 393813 Size: MF
(1)Glowplug Controller (Diesel)
(1)Glowplug Controller (Diesel)
(2)Water In Fuel Indicator Sensor (Diesel)
(3)C103
(4)C104
(5)Auto Apply Park Brake Harness
(6)Transmission
(7)Transmission Output Speed Sensor
(8)C301
(9)Transmission Input Speed Sensor
(10)Park/Neutral Position and Backup Lamps Switch
(11)To G106
(12)Fuel Heater (Diesel)

Lighting Systems Component Views P42

Figure 1:

Forward Lamps Harness (Typical)
Object Number: 180064 Size: MF
(1)Lamp, Left Front Park and Turn Signal
(2)C203
(3)C200
(4)C202
(5)Horn, High Tone (F - Note)
(6)Horn, Low Tone (A - Note)
(7)Lamp, Left Front Sidemarker
(8)Headlamp, Left
(9)Headlamp, Right
(10)Lamp, Right Front Sidemarker
(11)Lamp, Right Front Park and Turn Signal
Figure 2:

Automatic Transmission, Upper LH Rear
Object Number: 180082 Size: MF
(1)Transmission Input Speed Sensor
(2)Transmission Output Speed Sensor
(3)C301
(4)C2
(5)C1
(6)Park/Neutral Position (PNP) and Backup Lamps Switch
Figure 3:

Steering Column
Object Number: 329566 Size: SF
(1)Hazard Lamps Flasher Switch
(2)Transmission Range (TR) Lamp
(3)Multifunction Lever
(4)Turn Signal Switch Connector
(5)Cruise Control Switch Connector (P32)
(6)Wiper Switch Connector
Figure 4:

IP Side of Engine Wiring -- All Engines (P42)
Object Number: 180085 Size: MF
(1)Data Link Connector (DLC)
(2)Headlamps Dimmer Switch
(3)Brake Transmission Shift Interlock (BTSI) Solenoid
(4)Brake Transmission Shift Interlock (BTSI) Relay
(5)Horn Relay
(6)Daytime Running Lamps (DRL) Relay
(7)C210
(8)C211
(9)Torque Converter Clutch (TCC) and Stoplamps Switch
(10)Ignition Switch
(11)C1
(12)C2
(13)C1
(14)C2
(15)Turn Signal Switch Connector
(16)Crank Fuse
Figure 5:

Pedal Switches
Object Number: 180088 Size: MF
(1)Torque Converter Clutch (TCC) and Stop Lamps Switch
(2)Clutch Pedal Position (CPP) Switch
Figure 6:

Rear Lamps Typical (Body Builder Installed)
Object Number: 330034 Size: MF
(1)Lamp, Left Rear Sidemarker
(2)C400
(3)Lamp, Right Backup
(4)Lamp, Left Tail and Stop/Turn Signal
(5)Lamp, Left License
(6)Lamp, Right License
(7)G401
(8)Lamp, Right Tail and Stop/Turn Signal
(9)Lamp, Right Backup
(10)Lamp, Right Rear Sidemarker