GM Service Manual Online
For 1990-2009 cars only
Figure 1:

Turn Signal Switch and Hazard Flasher Module Inputs


Object Number: 686180  Size: FS
Master Electrical Component List
Exterior Lighting Systems Description and Operation
Park Lamp Relay
PWR, GND, Stoplamp Switch, Solenoid Valves, and Pump Motor
CCM, PCM Controls and Vehicle Speed Input
G401 (1 of 2)
G201
G201
G200 (1 of 2)
G200 (1 of 2)
License, Underhood, and Cornering Lamps
IGN-1, VENT SOL and SIR Fuses (Rear Fuse Block)
IGN-1, VENT SOL and SIR Fuses (Rear Fuse Block)
Figure 2:

Park Lamp Relay


Object Number: 686189  Size: FS
Master Electrical Component List
Exterior Lighting Systems Description and Operation
License, Underhood, and Cornering Lamps
Turn Signal Switch and Hazard Flasher Module Inputs
RH Exterior Lamps
LH Exterior Lamps
License, Underhood, and Cornering Lamps
Low Beam Headlamps
Figure 3:

License, Underhood, and Cornering Lamps


Object Number: 686192  Size: FS
Master Electrical Component List
Exterior Lighting Systems Description and Operation
LH Exterior Lamps
Park Lamp Relay
G103
G103
G401 (2 of 2)
G106, G107 and G101
G401 (1 of 2)
G401 (1 of 2)
G401 (2 of 2)
LH Exterior Lamps
Figure 4:

LH Exterior Lamps


Object Number: 686196  Size: FS
Master Electrical Component List
Exterior Lighting Systems Description and Operation
RH Exterior Lamps
License, Underhood, and Cornering Lamps
G402
G401 (1 of 2)
G103
G401 (1 of 2)
Turn Signal and High Beam Inputs
Park Lamp Relay
Figure 5:

RH Exterior Lamps


Object Number: 686199  Size: FS
Master Electrical Component List
Exterior Lighting Systems Description and Operation
LH Exterior Lamps
G401 (1 of 2)
G401 (1 of 2)
G103
Turn Signal and High Beam Inputs
Park Lamp Relay
Figure 6:

Backup Lights


Object Number: 686201  Size: FS
Master Electrical Component List
Exterior Lighting Systems Description and Operation
Serial Data Class 2
G401 (1 of 2)
G401 (1 of 2)
Inside Rear View Mirror w/DD7 or w/DD8
IGN SW and NSBU Fuses (Rear Fuse Block)