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

Circuit Power, Relays


Object Number: 653139  Size: FS
Master Electrical Component List
Exterior Lighting Systems Description and Operation
Stop Lamps, Trailer Stop Relay (L18)
Dome Panel, Park Lamp, MRR LP, Circuit Breakers
Circuit Power and Dimming Components
S219
CHAS, Axle, Circuit Breakers
Clearance and Roof Marker Lamps, Outside Rearview Mirrors, Upfitter Provisions
Clearance and Roof Marker Lamps, Outside Rearview Mirrors, Upfitter Provisions
Trailer Lighting
Park/Turn Signal Lamp, Tail Lamps IPC Indicators
Park/Turn Signal Lamp, Tail Lamps IPC Indicators
Clearance and Roof Marker Lamps, Outside Rearview Mirrors, Upfitter Provisions
Clearance and Roof Marker Lamps, Outside Rearview Mirrors, Upfitter Provisions
Clearance and Roof Marker Lamps, Outside Rearview Mirrors, Upfitter Provisions
Trailer Lighting
Clearance and Roof Marker Lamps, Outside Rearview Mirrors, Upfitter Provisions
Figure 2:

Stop Lamps, Trailer Stop Relay (L18)


Object Number: 653140  Size: FS
Master Electrical Component List
Exterior Lighting Systems Description and Operation
Stop Lamp Relays Trailer, Stop Relays (LG5)
Circuit Power, Relays
Stop, TRN/HAZ, Fuel Circuit Breakers
G11 (L18), G101 (LG5)
CHAS, Axle, Circuit Breakers
Trailer Lighting
S219
CHAS, Axle, Circuit Breakers
Turn Signal Switch, Hazard Switch
S219
CHAS, Axle, Circuit Breakers
Turn Signal Switch, Hazard Switch
Figure 3:

Stop Lamp Relays Trailer, Stop Relays (LG5)


Object Number: 653143  Size: FS
Master Electrical Component List
Exterior Lighting Systems Description and Operation
Turn Signal Switch, Hazard Switch
Stop Lamps, Trailer Stop Relay (L18)
Stop, TRN/HAZ, Fuel Circuit Breakers
Park Brake, Trans/Trlr, Trlr, PWDWDO/LKS, ABS Fuses
Trailer Lighting
G11 (L18), G101 (LG5)
CHAS, Axle, Circuit Breakers
S219
CHAS, Axle, Circuit Breakers
Turn Signal Switch, Hazard Switch
S219
CHAS, Axle, Circuit Breakers
Turn Signal Switch, Hazard Switch
Figure 4:

Turn Signal Switch, Hazard Switch


Object Number: 653145  Size: FS
Master Electrical Component List
Exterior Lighting Systems Description and Operation
Park/Turn Signal Lamp, Tail Lamps IPC Indicators
Stop Lamp Relays Trailer, Stop Relays (LG5)
Stop Lamp Relays Trailer, Stop Relays (LG5)
Stop Lamp Relays Trailer, Stop Relays (LG5)
Stop Lamps, Trailer Stop Relay (L18)
Stop Lamps, Trailer Stop Relay (L18)
Stop, TRN/HAZ, Fuel Circuit Breakers
S402, S409, S411, S413, S414
Park/Turn Signal Lamp, Tail Lamps IPC Indicators
Trailer Lighting
Park/Turn Signal Lamp, Tail Lamps IPC Indicators
Park/Turn Signal Lamp, Tail Lamps IPC Indicators
Park/Turn Signal Lamp, Tail Lamps IPC Indicators
Trailer Lighting
Park/Turn Signal Lamp, Tail Lamps IPC Indicators
Park/Turn Signal Lamp, Tail Lamps IPC Indicators
CHAS, Axle, Circuit Breakers
Figure 5:

Park/Turn Signal Lamp, Tail Lamps IPC Indicators


Object Number: 653146  Size: FS
Master Electrical Component List
Exterior Lighting Systems Description and Operation
Clearance and Roof Marker Lamps, Outside Rearview Mirrors, Upfitter Provisions
Turn Signal Switch, Hazard Switch
Turn Signal Switch, Hazard Switch
Circuit Power, Relays
Turn Signal Switch, Hazard Switch
Turn Signal Switch, Hazard Switch
Circuit Power, Relays
Turn Signal Switch, Hazard Switch
Turn Signal Switch, Hazard Switch
Turn Signal Switch, Hazard Switch
CHAS, Axle, Circuit Breakers
S117, S118
S219
CHAS, Axle, Circuit Breakers
Figure 6:

Clearance and Roof Marker Lamps, Outside Rearview Mirrors, Upfitter Provisions


Object Number: 653148  Size: FS
Master Electrical Component List
Exterior Lighting Systems Description and Operation
Trailer Lighting
Park/Turn Signal Lamp, Tail Lamps IPC Indicators
Circuit Power, Relays
Circuit Power, Relays
Circuit Power, Relays
Circuit Power, Relays
Circuit Power, Relays
Circuit Power, Relays
CHAS, Axle, Circuit Breakers
S402, S409, S411, S413, S414
G210, S204, S216, S245
Figure 7:

Trailer Lighting


Object Number: 653150  Size: FS
Master Electrical Component List
Exterior Lighting Systems Description and Operation
Backup Lamps
Clearance and Roof Marker Lamps, Outside Rearview Mirrors, Upfitter Provisions
Turn Signal Switch, Hazard Switch
Turn Signal Switch, Hazard Switch
Stop Lamp Relays Trailer, Stop Relays (LG5)
Stop Lamps, Trailer Stop Relay (L18)
Circuit Power, Relays
Circuit Power, Relays
CHAS, Axle, Circuit Breakers
Figure 8:

Backup Lamps


Object Number: 653152  Size: FS
Master Electrical Component List
Exterior Lighting Systems Description and Operation
Trailer Lighting
B/U and IGN 3 Circuit Breaker (1 of 2)
Park Brake, Trans/Trlr, Trlr, PWDWDO/LKS, ABS Fuses
B/U and IGN 3 Circuit Breaker (1 of 2)
IGN SW Circuit Breakers (2 of 4)
TCM Interface Module Relays Indicator
S117, S118