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
Rear Compartment Lid Park Lamp
Battery Voltage Supply to Underhood Fuse Blocks
Battery Voltage Supply to Underhood Fuse Blocks
Battery Voltage Supply to Underhood Fuse Blocks
Left Underhood Fuse Block- OXY SEN and SBM LCM Fuses
Left Underhood Fuse Block- ABS, PCM, HZDT/SG, F/PMP and LP PK Fuses
Dimming Control: Right Air Temperature Assembly, Ashtray, and Heated Seat Switch Backlighting
Rear Compartment Lid Park Lamp
Left Park Lamps
G202 (2 of 4)
G202 (1 of 4)
Figure 2:

Left Park Lamps


Object Number: 875651  Size: FS
Master Electrical Component List
Exterior Lighting Systems Description and Operation
Right Park Lamps
Headlamp Switch and Park Lamp Control
Headlamp Switch and Park Lamp Control
Rear Window Switches
Left Turn Lamps
G306 and G402
G104 and G106
G202 (1 of 4)
Figure 3:

Right Park Lamps


Object Number: 661624  Size: FS
Master Electrical Component List
Exterior Lighting Systems Description and Operation
Rear Compartment Lid Park Lamp
Left Park Lamps
Headlamp Switch and Park Lamp Control
Right Turn Lamps
Rear Compartment Lid Park Lamp
Rear Window Switches
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/Multifunction Switch and Cornering Lamps
Right Park Lamps
Right Park Lamps
G400 (1 of 2)
G400 (1 of 2)
Figure 5:

Turn Signal/Multifunction Switch and Cornering Lamps


Object Number: 661627  Size: FS
Master Electrical Component List
Exterior Lighting Systems Description and Operation
Left Turn Lamps
Rear Compartment Lid Park Lamp
Battery Voltage Supply to Underhood Fuse Blocks
Battery Voltage Supply to Underhood Fuse Blocks
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:

Left Turn Lamps


Object Number: 875652  Size: FS
Master Electrical Component List
Exterior Lighting Systems Description and Operation
Right Turn Lamps
Turn Signal/Multifunction Switch and Cornering Lamps
Left Park Lamps
G104 and G106
G400 (1 of 2)
G306 and G402
Figure 7:

Right Turn Lamps


Object Number: 875653  Size: FS
Master Electrical Component List
Exterior Lighting Systems Description and Operation
Stop Lamps
Left Turn Lamps
Right Park Lamps
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
Backup Lamps
Right Turn Lamps
Battery Voltage Supply to Underhood Fuse Blocks
Indicators and Stoplamp Switch
G400 (1 of 2)
G400 (1 of 2)
G306 and G402
Figure 9:

Backup Lights


Object Number: 661634  Size: FS
Master Electrical Component List
Exterior Lighting Systems Description and Operation
Stop Lamps
Left Underhood Fuse Block- ABS, PCM, HZDT/SG, F/PMP and LP PK Fuses
Inside Rearview Mirror Schematics
Power and Ground
Class 2 Serial Data Line
G400 (1 of 2)
VSS and Transmission Internal Mode Switch