GMC Pickup C2500 (1985-2000) illum fuse 14 Wiring diagrams

AUDIO ALARM MODULE (ON CONVENIENCE CENTER) AUTOMATIC TRANSFER CASE CONTROL SWITCH (LUXURY) AUTOMATIC TRANSFER CASH SELECT SWITCH AUXILIARY HEATER CONTROL BASE BLK WIRE CARGO LAMP SWITCH (PICKUP ONLY) TRANSFER CASE SWITCH CONVEN- IENCE CENTER DAYTIME RUNNING LAMP (DRL)/ RADIO OVERRIDE SWITCH DAYTIME RUNNING LAMPS (DRL)/ RADIO OVERRIDE SWITCH DISPLAY DIM SIG DISPLAY DISPLAY DIM DIM SIG SIG FOG LAMP SWITCH FRONT AUXILIARY HVAC CONTROL LAMP GRN WIRE GRY WIRE HEADLAMP, PANEL DIMMER SWITCH HOT AT ALL TIMES HVAC CONTROL LAMP I/P FUSE BLOCK ILLUM FUSE 14 ILLUMINATION INFLATABLE RESTAINT I/P MODULE SWITCH INSTRUMENT CLUSTER LIFTGATE RELEASE SWITCH (SUBUR- BAN/ UTILITIY ONLY) LUXURY OFF ORG/ WIRE PARADE MODE SW PARK PARK LPS FUSE 9 PICKUP/ EXTENDED CAB ONLY PPL PPL PPL RADIO RADIO INFLATABLE RESTAINT I/P MODULE SWITCH REAR AUXILIARY HVAC CONTROL LAMP REAR AUXILIARY HVAC CONTROL SWITCH REAR WINDOW WIPER/ WASHER SWITCH RHEO- STAT SUBURBAN, UTILITY ONLY SWITCH (SUBUR- BAN/ UTILITIY ONLY) TRANSFER CASE SHIFT ILLUMINATION LAMP TRANSFER CASE SWITCH WHT WIRE

AUXILIARY BATTERY AUXILIARY BATTERY RELAY (LEFT REAR OF ENGINE COMPT) AUXILIARY HEATER AND A/C CONTROL LOGIC MODULE AUXILIARY HEATER AND A/C CONTROL MODULE (FRONT) AUXILIARY HEATER AND A/C CONTROL MODULE (REAR) BLK WIRE BLK/RED WIRE BLU WIRE BRAKE FUSE 18 BRN WIRE CONVENIENCE CENTER CRUISE CONTROL MODULE CRUISE CONTROL SWITCH CRUISE FUSE 6 DK GRN WIRE ELECTRONIC BRAKE CONTROL MODULE EXCEPT DIESEL DIESEL FROM IGNITION SWITCH (DIAGRAM 2 OF 4) FROM STOP/HAZ FUSE 1 (DIAGRAM 2 OF 4) FROM UNDERHOOD FUSE-RELAY CENTER (DIAGRAM 1 OF 4) FRONT MODE DOOR MOTOR FRONT TEMPERATURE DOOR MOTOR FUSE 24 FUSIBLE LINK GRY WIRE HEATER AND A/C CONTROL MODULE HEATER AND A/C CONTROL SWITCH HTR A/C FUSE 12 I/P FUSE BLOCK ILLUM FUSE 14 INTERIOR LIGHTS SYSTEM (HEADLAMP AND PANEL LAMP DIMMER) LEFT FRONT FENDER) ORG/ WIRE POWER STEERING CONTROL MODULE REAR AUXILIARY TEMPERATURE DOOR MOTOR REAR HIGH BLOWER RELAY REAR LOW BLOWER RELAY REAR REAR MEDIUM AUXILIARY BLOWER MODE DOOR RELAY MOTOR RECIRCULATION DOOR MOTOR RR HVAC FUSE 5 SECURITY/ STRG FUSE 21 TCC/ STOPLAMP SWITCH TRANSFER SPARE CASE POWER SELECT SOURCE SWITCH VEHICLE CONTROL MODULE

AUDIO ALARM MODULE AUXILIARY HEATER/ A/C CONTROL REAR AUXILIARY REAR HEATER/ WIPER/ A/C CONTROL WASHER FRONT SWITCH CARGO LAMP SWITCH CONVENIENCE CENTER CTSY FUSE 3 DAYTIME RUNNING LAMPS RELAY DIODE DK GRN WIRE DRL/FOG FUSE 15 FOG FOG LAMP LAMP RELAY RELAY FOG LAMP SWITCH FROM MAXI FUSE 8 FRONT DOME/ READING LAMPS GLOVE BOX LAMP) GRY WIRE HEADLAMP AND PANEL DIMMER SWITCH I/P FUSE BLOCK ILLUM FUSE 14 INSTRUMENT CLUSTER LEFT FRONT DOOR COURTESY LAMP LEFT I/P SPARE COURTESY POWER LAMP SOURCE LEFT REAR DOOR COURTESY LAMP LEFT VANITY MIRROR ORG/ WIRE PARK LAMPS PICKUP ONLY PICKUP SUBURBAN, UTILITY PK LPS FUSE 9 RADIO HEATER/ CARGO LAMP A/C CONTROL SWITCH LAMP REAR DOME READING LAMPS REAR LIFTGATE RELEASE SWITCH RED WIRE REMOTE OUTSIDE MIRROR SWITCH RIGHT FRONT DOOR COURTESY LAMP RIGHT I/P COURTESY LAMP RIGHT REAR DOOR COURTESY LAMP RIGHT VANITY MIRROR SUBURBAN ONLY SUBURBAN, UTILITY ONLY TWO WHEEL DRIVE INDICATOR

AUDIO ALARM MODULE AUXILIARY HEATER/ A/C CONTROL REAR AUXILIARY REAR HEATER/ WIPER/ A/C CONTROL WASHER FRONT SWITCH CARGO LAMP SWITCH CONVENIENCE CENTER CTSY FUSE 3 DAYTIME RUNNING LAMPS RELAY DIODE DK GRN WIRE DRL/FOG FUSE 15 FOG FOG LAMP LAMP RELAY RELAY FOG LAMP SWITCH FROM MAXI FUSE 8 FRONT DOME/ READING LAMPS GLOVE BOX LAMP) GRY WIRE HEADLAMP AND PANEL DIMMER SWITCH I/P FUSE BLOCK ILLUM FUSE 14 INSTRUMENT CLUSTER LEFT FRONT DOOR COURTESY LAMP LEFT I/P SPARE COURTESY POWER LAMP SOURCE LEFT REAR DOOR COURTESY LAMP LEFT VANITY MIRROR ORG/ WIRE PARK LAMPS PICKUP ONLY PICKUP SUBURBAN, UTILITY PK LPS FUSE 9 RADIO HEATER/ CARGO LAMP A/C CONTROL SWITCH LAMP REAR DOME READING LAMPS REAR LIFTGATE RELEASE SWITCH RED WIRE REMOTE OUTSIDE MIRROR SWITCH RIGHT FRONT DOOR COURTESY LAMP RIGHT I/P COURTESY LAMP RIGHT REAR DOOR COURTESY LAMP RIGHT VANITY MIRROR SUBURBAN ONLY SUBURBAN, UTILITY ONLY TWO WHEEL DRIVE INDICATOR

5 CM FROM TRANSFER CASE BREAK-OUT) BLK WIRE BLK/WHT WIRE BRN WIRE CONVENIENCE CENTER DIESEL FROM ENGINE HARN BREAK-OUT) FRONT AXLE ACTUATOR FRONT AXLE SWITCH FUSE 24 GASOLINE GRY WIRE GRY/BLK WIRE HOT IN PARK OR HEAD HOT IN RUN I/P FUSE BLOCK ILLUM FUSE 14 INDICATOR LT BLU WIRE POWERTRAIN CONTROL MODULE (REARWARD OF LEFT SHOCK TOWER) RED WIRE TRANSFER CASE MODE SELECTOR ILLUMINATION LAMP TRANSFER CASE RELAY TRANSFER CASE SWITCH (TOP LEFT OF TRANSFER CASE) TRANSFER CASE SYNCHRONIZER

5 CM FROM TRANSFER CASE BREAK-OUT) BLK WIRE BLK/WHT WIRE BRN WIRE CONVENIENCE CENTER DIESEL FROM ENGINE HARN BREAK-OUT) FRONT AXLE ACTUATOR FRONT AXLE SWITCH FUSE 24 GASOLINE GRY WIRE GRY/BLK WIRE HOT IN PARK OR HEAD HOT IN RUN I/P FUSE BLOCK ILLUM FUSE 14 INDICATOR LT BLU WIRE POWERTRAIN CONTROL MODULE (REARWARD OF LEFT SHOCK TOWER) RED WIRE TRANSFER CASE MODE SELECTOR ILLUMINATION LAMP TRANSFER CASE RELAY TRANSFER CASE SWITCH (TOP LEFT OF TRANSFER CASE) TRANSFER CASE SYNCHRONIZER

5 CM FROM TRANSFER CASE BREAK-OUT) BLK WIRE BLK/WHT WIRE BRN WIRE CONVENIENCE CENTER DIESEL FROM ENGINE HARN BREAK-OUT) FRONT AXLE ACTUATOR FRONT AXLE SWITCH FUSE 24 GASOLINE GRY WIRE GRY/BLK WIRE HOT IN PARK OR HEAD HOT IN RUN I/P FUSE BLOCK ILLUM FUSE 14 INDICATOR LT BLU WIRE POWERTRAIN CONTROL MODULE (REARWARD OF LEFT SHOCK TOWER) RED WIRE TRANSFER CASE MODE SELECTOR ILLUMINATION LAMP TRANSFER CASE RELAY TRANSFER CASE SWITCH (TOP LEFT OF TRANSFER CASE) TRANSFER CASE SYNCHRONIZER

5 CM FROM TRANSFER CASE BREAK-OUT) BLK WIRE BLK/WHT WIRE BRN WIRE CONVENIENCE CENTER DIESEL FROM ENGINE HARN BREAK-OUT) FRONT AXLE ACTUATOR FRONT AXLE SWITCH FUSE 24 GASOLINE GRY WIRE GRY/BLK WIRE HOT IN PARK OR HEAD HOT IN RUN I/P FUSE BLOCK ILLUM FUSE 14 INDICATOR LT BLU WIRE POWERTRAIN CONTROL MODULE (REARWARD OF LEFT SHOCK TOWER) RED WIRE TRANSFER CASE MODE SELECTOR ILLUMINATION LAMP TRANSFER CASE RELAY TRANSFER CASE SWITCH (TOP LEFT OF TRANSFER CASE) TRANSFER CASE SYNCHRONIZER

5 CM FROM TRANSFER CASE BREAK-OUT) BLK WIRE BLK/WHT WIRE BRN WIRE CONVENIENCE CENTER DIESEL FROM ENGINE HARN BREAK-OUT) FRONT AXLE ACTUATOR FRONT AXLE SWITCH FUSE 24 GASOLINE GRY WIRE GRY/BLK WIRE HOT IN PARK OR HEAD HOT IN RUN I/P FUSE BLOCK ILLUM FUSE 14 INDICATOR LT BLU WIRE POWERTRAIN CONTROL MODULE (REARWARD OF LEFT SHOCK TOWER) RED WIRE TRANSFER CASE MODE SELECTOR ILLUMINATION LAMP TRANSFER CASE RELAY TRANSFER CASE SWITCH (TOP LEFT OF TRANSFER CASE) TRANSFER CASE SYNCHRONIZER

AUDIO ALARM MODULE (ON CONVENIENCE CENTER) BLK WIRE BLK/WHT WIRE DIESEL GAS GAUGES FUSE 4 GRY WIRE HOT AT ALL TIMES HOT IN PARK OR HEADLIGHT HOT IN RUN, BULB TEST OR START I/P FUSE BLOCK (UNDER LEFT SIDE OF DASH) ILLUM FUSE 14 INSTRU- MENT CLUSTER SAFETY BELTS INDICATOR KEY-IN WARNING BUZZER SWITCH LEFT DOOR JAMB SWITCH LIGHTS ON INPUT POWER INPUT KEY-IN WARNING LT GRN WIRE ORG/ WIRE PNK IGNITION ON INPUT WIRE PNK WIRE SEAT BELT INPUT GROUND FASTEN BELTS OUT SEAT BELT SWITCH (IN DRIVER'S SAFETY BELT BUCKLE) STOP/HAZ FUSE 1 SUPPLEMENTAL RESTRAINTS SYSTEM TAN WIRE YEL WIRE