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

Headlamp Switch and Park Lamp Control


Object Number: 661622  Size: FS
Master Electrical Component List
Exterior Lighting Systems Description and Operation
LH Park Lamps
Underhood Fuse Block, RUN/CRK Fuse and IGN Relay
Underhood Fuse Block and Underhood Maxi-Fuse Block
Underhood Fuse Block and Underhood Maxi-Fuse Block
Underhood Fuse Block- OXY SEN and SBM LCM Fuses
Underhood Fuse Block- PCM, ABS, HZDT/SG, F/PMP, PK LP Fuses and F/PMP Relay
Dimming Control: Passenger Temperature Control, Ashtray, and Heated Seat Switch Backlighting
LH Park Lamps
RH Park Lamps
G202 (2 of 4)
G202 (1 of 4)
Figure 2:

LH Park Lamps


Object Number: 661626  Size: FS
Master Electrical Component List
Exterior Lighting Systems Description and Operation
RH Park Lamps
Headlamp Switch and Park Lamp Control
Headlamp Switch and Park Lamp Control
Rear Power Window Components
Stop Lamps
LH Turn Lamps
LH Turn Lamps
LH Turn Lamps
G306 and G402
G104 and G106
G202 (1 of 4)
Figure 3:

RH Park Lamps


Object Number: 661624  Size: FS
Master Electrical Component List
Exterior Lighting Systems Description and Operation
Rear Compartment Lid Park Lamp
LH Park Lamps
Headlamp Switch and Park Lamp Control
RH Turn Lamps
RH Turn Lamps
RH Turn Lamps
Rear Compartment Lid Park Lamp
Rear Power Window Components
Stop Lamps
G105
G400 (1 of 2)
Figure 4:

Rear Compartment Lid Park Lamp


Object Number: 661625  Size: FS
Master Electrical Component List
Exterior Lighting Systems Description and Operation
Turn Signal/Hazard Switch and Cornering Lamps
RH Park Lamps
RH Park Lamps
Stop Lamps
Stop Lamps
LH Turn Lamps
RH Turn Lamps
G400 (1 of 2)
G400 (1 of 2)
Figure 5:

Turn Signal/Hazard Switch and Cornering Lamps


Object Number: 661627  Size: FS
Master Electrical Component List
Exterior Lighting Systems Description and Operation
LH Turn Lamps
Rear Compartment Lid Park Lamp
Underhood Fuse Block and Underhood Maxi-Fuse Block
Underhood Fuse Block, RUN/CRK Fuse and IGN Relay
G105
G105
G104 and G106
G104 and G106
G202 (1 of 4)
G202 (1 of 4)
G202 (1 of 4)
G202 (4 of 4)
Figure 6:

LH Turn Lamps


Object Number: 661628  Size: FS
Master Electrical Component List
Exterior Lighting Systems Description and Operation
RH Turn Lamps
Turn Signal/Hazard Switch and Cornering Lamps
LH Park Lamps
LH Park Lamps
LH Park Lamps
Rear Compartment Lid Park Lamp
G104 and G106
G400 (1 of 2)
G306 and G402
Figure 7:

RH Turn Lamps


Object Number: 661629  Size: FS
Master Electrical Component List
Exterior Lighting Systems Description and Operation
Stop Lamps
LH Turn Lamps
RH Park Lamps
RH Park Lamps
RH Park Lamps
Rear Compartment Lid Park Lamp
G400 (1 of 2)
G400 (2 of 2)
G105
Figure 8:

Stop Lamps


Object Number: 661632  Size: FS
Master Electrical Component List
Exterior Lighting Systems Description and Operation
RH Turn Lamps
Underhood Fuse Block and Underhood Maxi-Fuse Block
Indicators and Stoplamp Switch
Rear Compartment Lid Park Lamp
Rear Compartment Lid Park Lamp
RH Park Lamps
LH Park Lamps
G400 (1 of 2)
G400 (1 of 2)
G306 and G402
Figure 9:
Object Number: 661634  Size: FS
Master Electrical Component List
Exterior Lighting Systems Description and Operation
Underhood Fuse Block- PCM, ABS, HZDT/SG, F/PMP, PK LP Fuses and F/PMP Relay
Inside Rear View Mirror
Class 2 Serial Data Line
G400 (1 of 2)