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

Power and Headlamp Switch


Object Number: 754305  Size: FS
Master Electrical Component List
Exterior Lighting Systems Description and Operation
FR PRK LPS, LR PRK LP, RR PRK LP, and TRL PRK LP Fuses
PARK LP, FR PRK, LR PRK, RR PRK, and TRL PRK Fuses
B+ Bus Bar
Power, Headlamp Switch, and Multifunction Switch
G117
FR PRK LPS, LR PRK LP, RR PRK LP, and TRL PRK LP Fuses
Power, Ground and BCM
ILLUM and PARK LP Fuses
Figure 2:

FR PRK LPS, LR PRK LP, RR PRK LP, and TRL PRK LP Fuses


Object Number: 754308  Size: FS
Master Electrical Component List
Exterior Lighting Systems Description and Operation
Turn Signal Switch, RH TURN, RH REAR TURN, and TRL TURN Fuses
Power and Headlamp Switch
Power and Headlamp Switch
PARK LP, FR PRK, LR PRK, RR PRK, and TRL PRK Fuses
G111 and G112
G111 and G112
G111 and G112
S313 and S419
S320 and S420
G450
G402 and G420
Figure 3:

Turn Signal Switch, RH TURN, RH REAR TURN, and TRL TURN Fuses


Object Number: 754309  Size: FS
Master Electrical Component List
Exterior Lighting Systems Description and Operation
Hazard Switch, TURN, and HAZ LP Fuses
FR PRK LPS, LR PRK LP, RR PRK LP, and TRL PRK LP Fuses
Hazard Switch, TURN, and HAZ LP Fuses
Hazard Switch, TURN, and HAZ LP Fuses
Hazard Switch, TURN, and HAZ LP Fuses
Hazard Switch, TURN, and HAZ LP Fuses
S320 and S420
G450
G111 and G112
G111 and G112
Figure 4:

Hazard Switch, TURN, and HAZ LP Fuses


Object Number: 754310  Size: FS
Master Electrical Component List
Exterior Lighting Systems Description and Operation
STOP LP, VEH HMSL, and TRL HMSL Fuses
Turn Signal Switch, RH TURN, RH REAR TURN, and TRL TURN Fuses
Turn Signal Switch, RH TURN, RH REAR TURN, and TRL TURN Fuses
Turn Signal Switch, RH TURN, RH REAR TURN, and TRL TURN Fuses
Turn Signal Switch, RH TURN, RH REAR TURN, and TRL TURN Fuses
Turn Signal Switch, RH TURN, RH REAR TURN, and TRL TURN Fuses
G111 and G112
G111 and G112
S313 and S419
G450
TURN, HAZ SW, LT TURN, TRL TRN, LT TRN, TRR TRN, RT TRN, and RT TURN Fuses
Data Link Connector (DLC), PCM and Engine Oil Pressure Gauge Sensor
G200 and G201
Hazard Switch, Radio, Instrument Panel Cluster (IPC) and Ground
SP203
Figure 5:

STOP LP, VEH HMSL, and TRL HMSL Fuses


Object Number: 754313  Size: FS
Master Electrical Component List
Exterior Lighting Systems Description and Operation
Backup Lights
Hazard Switch, TURN, and HAZ LP Fuses
B+ Bus Bar
Cruise Control Schematics
S313 and S419
S320 and S420
G450
Figure 6:

Backup Lights


Object Number: 754315  Size: FS
Master Electrical Component List
Exterior Lighting Systems Description and Operation
STOP LP, VEH HMSL, and TRL HMSL Fuses
S313 and S419
Ign START, RUN and ACC Bus Bar
B/U LP, OXYGEN, ENG I, TRL B/U, VEH B/U and BTSI Fuses
Automatic Day-Night Mirrors Schematics
G450
S320 and S420