Chevrolet Cab & Chassis K2500 (1989-2000) ign e mini fuse Wiring diagrams

419 456 389 5 15 4 MIL IND UPSHIFT IND SPEEDO ACCY BULB TEST LOCK OFF ANTI- LOCK BRAKES IND ANTI-LOCK BRAKES SYSTEM BAT IND BLK WIRE BLK/WHT WIRE BRAKE IND BRAKE PRESSURE WARNING SWITCH (ON REAR OF EBCM CASTING) BRN WIRE BRN/WHT WIRE CHECK GAUGES IND CHECK GAUGES LAMP DRIVER DAYTIME RUNNING LAMPS IND AIR BAG IND DAYTIME RUNNING LAMPS MODULE (BEHIND LEFT SIDE OF DASH, TAPED TO DASH HARNESS) DK BLU WIRE DK BLU/WHT WIRE DK GRN WIRE ENGINE CONTROLS SYSTEM (FUEL PUMP BALANCE RELAY) ENGINE COOLANT TEMPERATURE SENDER (LEFT CYLINDER HEAD) FUEL GAUGE FUEL PUMP BALANCE MODULE (INSIDE LEFT SIDE FRAME RAIL) FUEL PUMP, SENDER (IN FRONT FUEL TANK) FUEL PUMP, SENDER (IN FUEL TANK) GRN WIRE GRY WIRE HEADLIGHTS SYSTEM HI-BEAM IND HOT IN RUN OR START HOT IN RUN, BULB TEST OR START I/P FUSE BLOCK (LEFT END OF DASH) GAUGES FUSE 4 IGN IGN E MINI FUSE IGN SW BRAKE IND BRAKE PSI PK BRAKE 33 33 IGNITION COIL (RIGHT REAR OF ENGINE) IGNITION SWITCH ILLUM ILLUMINATION INSTRUMENT CLUSTER LED DIMMING LEFT TURN IND LT BLU WIRE LT GRN WIRE LT GRN/BLK WIRE M/T A/T PNK WIRE OIL GAUGE PARITY PRNDL PNK WIRE PPL PPL 9 29 30 FUEL VSS VSS PPL/WHT WIRE PRNDL PRNDL A PRNDL B PRNDL C RIGHT TURN IND RUN WIRE SAFETY BELT IND SECONDARY FUEL GAGE SENDER (IN REAR FUEL TANK) SENS RTRN FUEL IN SERVICE ENGINE SOON IND SINGLE FUEL TANK DUAL FUEL TANKS STARTING/CHARGING SYSTEM SUPPLEMENTAL RESTRAINTS SYSTEM TACH TAN WIRE TAN/BLK WIRE TAN/WHT WIRE TEMP GAUGE TRANS FUSE 20 TRANSMISSION RANGE SELECTOR (LEFT SIDE OF TRANSMISSION) TWISTED PAIR UNDERHOOD FUSE-RELAY CENTER UPSHIFT IND (M/T ONLY) VEHICLE CONTROL MODULE (LEFT SIDE OF ENGINE COMPT) VEHICLE SPEED SENSOR (LEFT REAR OF TRANSMISSION OR TRANSFER CASE) VEHICLE SPEED SENSOR (VSS) ADAPTER VOLTMETER SPEEDOMETER WARNING SYSTEMS WHT TAN/ WIRE WHT WIRE YEL WIRE

39 (OR 1020) 7.4L VIN J ONLY 900 419 507 389 12 5 15 4 FUEL RET MIL IND UPSHIFT IND SPEEDO ACCY ANTI- LOCK BRAKES IND ANTI-LOCK BRAKES SYSTEM ANTI-THEFT SYSTEM BAT IND HI BEAM IND BLK WIRE BLK/WHT WIRE BRAKE IND BRAKE PRESSURE WARNING SWITCH (ON UNDERSIDE OF ELECTRONIC BRAKE CONTROL MODULE) BRN WIRE BRN/WHT WIRE CHECK GAUGES IND CHECK GAUGES LAMP DRIVER CONVENIENCE CENTER DAYTIME RUNNING LAMPS IND AIR BAG IND DK BLU WIRE DK BLU/WHT WIRE DK GRN WIRE ELECTRONIC BRAKE CONTROL MODULE (EBCM) (ON LEFT SIDE OF ENGINE COMPT) ENGINE CONTROLS SYSTEM (FUEL PUMP BALANCE RELAY) FUEL GAUGE FUEL PUMP BALANCE MODULE (INSIDE LEFT SIDE OF FRAME RAIL) FUEL PUMP, SENDER (IN FUEL TANK) GRN WIRE GRY WIRE HEADLIGHTS SYSTEM HOT IN RUN OR START I/P FUSE BLOCK GAUGES FUSE 4 HOT IN RUN, BULB TEST OR START IGN IGN E MINI FUSE IGN SW BRAKE IND BRAKE PSI PK BRAKE 33 33 IGNITION COIL (TOP LEFT REAR OF ENGINE) IGNITION SWITCH ILLUMINATION INSTRUMENT CLUSTER LED DIMMING LEFT TURN IND LOCK OFF LT BLU WIRE LT GRN WIRE LT GRN/BLK WIRE M/T A/T PNK WIRE MALFUNC- TION INDICATOR LAMP NCA WIRE PARITY PRNDL PARK BRAKE SWITCH (ON PARK BRAKE PEDAL BRACKET) PNK WIRE PPL PPL 9 29 30 FUEL VSS VSS PPL/WHT WIRE PRNDL PRNDL A PRNDL B PRNDL C RIGHT TURN IND RUN WIRE SAFETY BELT IND SECONDARY FUEL GAUGE SENDER (IN REAR FUEL TANK) SECURITY IND SENS RTRN FUEL IN SERVICE ENGINE SOON SINGLE FUEL TANK DUAL FUEL TANKS SPEEDOMETER STARTING/CHARGING SYSTEM SUPPLEMENTAL RESTRAINTS SYSTEM TACH TAN WIRE TAN/WHT WIRE TEMP GAUGE OIL GAUGE TRANS FUSE 20 TRANSMISSION RANGE SWITCH TWISTED PAIR UNDERHOOD FUSE BLOCK UPSHIFT IND (M/T ONLY) VEHICLE CONTROL MODULE (VCM) (LEFT SIDE OF ENGINE COMPT) VEHICLE SPEED SENSOR (LEFT SIDE OF TRANSMISSION, LEFT SIDE OF TRAN- VEHICLE SPEED SENSOR (VSS) ADAPTER VOLTMETER WARNING SYSTEMS WHT WIRE YEL WIRE

A/T M/T ACCY ANTI-LOCK BRAKES SYSTEM BLK WIRE BLK/WHT WIRE BRAKE PRESSURE WARNING SWITCH (ON REAR OF EBCM CASTING) BRN WIRE DK BLU/WHT WIRE DK GRN WIRE DK GRN/WHT WIRE DUAL FUEL TANKS SINGLE FUEL TANK ELECTRONIC BRAKE CONTROL MODULE (EBCM) (ON LEFT SIDE OF ENGINE COMPT) ENG-1 MINI FUSE ENGINE CONTROLS SYSTEM (FUEL PUMP BALANCE RELAY) ENGINE CONTROLS SYSTEM RADIO ENGINE CONTROLS SYSTEM FUEL GAUGE SENDER (IN FRONT FUEL TANK) FUEL PUMP BALANCE MODULE (INSIDE LEFT SIDE OF FRAME RAIL) FUEL PUMP/ SENDER GAUGES FUSE 4 GRN WIRE HOT IN RUN OR START HOT IN RUN OR START FUSE/RELAY BLOCK (LEFT REAR OF ENGINE COMPT) HOT IN RUN, BULB TEST OR START I/P FUSE BLOCK (UNDER LEFT SIDE OF DASH) IGN E MINI FUSE IGN SW BRAKE IND BRAKE PSI PK BRAKE 33 33 IGNITION SWITCH LOCK OFF LT BLU WIRE LT GRN WIRE LT GRN/BLK WIRE NCA WIRE PARK BRAKE SWITCH (ON PARK BRAKE PEDAL BRACKET) PNK 639 975 970 497 451 30 WIRE PNK PNK WIRE PNK PPL WIRE PNK WIRE PPL PPL/WHT WIRE RUN WIRE SECONDARY FUEL GAUGE SENDER (IN REAR FUEL TANK) TAN/WHT WIRE TRANS FUSE 20 TWISTED PAIR VEHICLE SPEED SENSOR (LEFT SIDE OF TRANSMISSION, LEFT SIDE OF TRANSFER CASE VEHICLE SPEED SENSOR (VSS) ADAPTER VEHICLE SPEED SENSOR BUFFER (BEHIND RIGHT SIDE OF DASH) YEL/BLK WIRE

ACCY ANTI-LOCK BRAKES SYSTEM BLK WIRE BLK/WHT WIRE BRAKE IND IN BRAKE PRESSURE WARNING SWITCH (ON REAR OF EBCM CASTING) BRN WIRE BULB TEST DK BLU/WHT WIRE DK GRN WIRE DK GRN/WHT WIRE ELECTRONIC BRAKE CONTROL MODULE (LEFT SIDE OF ENGINE COMPT) ENG-1 MINI FUSE ENGINE CONTROLS SYSTEM (FUEL PUMP BALANCE RELAY) ENGINE CONTROLS SYSTEM TRANSMISSION SYSTEM ENGINE CONTROLS SYSTEM FUEL GAGE SENDER (IN FRONT FUEL TANK) FUEL PUMP BALANCE MODULE (INSIDE LEFT SIDE OF FRAME RAIL) FUEL PUMP/ SENDER GAUGES FUSE 4 GRN WIRE HOT IN RUN, BULB TEST OR START I/P FUSE BLOCK (LEFT END OF DASH) IGN E MINI FUSE IGN SW BRAKE IND BRAKE PSI PK BRAKE 33 33 IGNITION SWITCH LOCK OFF LT BLU WIRE LT GRN WIRE LT GRN/BLK WIRE M/T A/T PARK BRAKE WARNING SWITCH (ON PARKING BRAKE PEDAL BRACKET) PNK PNK WIRE PNK PPL WIRE PNK WIRE PPL PPL/WHT WIRE RADIO RUN WIRE SECONDARY FUEL GAGE SENDER (IN REAR FUEL TANK) SINGLE FUEL TANK DUAL FUEL TANKS TAN/WHT WIRE TRANS FUSE 20 TWISTED PAIR UNDERHOOD FUSE-RELAY CENTER (LEFT REAR OF ENGINE COMPT) UNDERHOOD FUSE-RELAY CENTER (LEFT REAR OF ENGINE COMPT) DIODE 1 VEHICLE SPEED SENSOR (LEFT REAR OF TRANSMISSION OR TRANSFER CASE) VEHICLE SPEED SENSOR (VSS) ADAPTER VEHICLE SPEED SENSOR BUFFER (BEHIND RIGHT SIDE OF DASH) WHT TAN/ WIRE WHT WIRE YEL/BLK WIRE

1 2 3 4 5 6 7 8 9 10 ILLUMINATION GROUND A/C DISABLE AUX FAN CTRL IGNITION A/C COMPRESSOR CLUTCH A/C COMPRESSOR CLUTCH CYCLING SWITCH (IN LOW PRESSURE LINE NEAR COMPRESSOR) A/C COMPRESSOR CLUTCH RELAY (IN UNDERHOOD FUSE/RELAY CENTER) A/C CTRL A/C HIGH PRESSURE CUTOUT SWITCH (AT A/C COMPRESSOR) A/C MAXI FUSE 3 CENTER A/C REQ AUX FAN MINI FUSE AUXILIARY COOLING FAN A/C PRESSURE SWITCH AUXILIARY COOLING FAN MOTOR AUXILIARY COOLING FAN RELAY (7.4L VIN J) (IN UNDERHOOD FUSE/RELAY CENTER) BATTERY IGNITION GROUND DEFOGGER ELEMENT BLK WIRE BLOWER MOTOR BLOWER RESISTOR (UNDER RIGHT SIDE OF I/P, ON HEATER HOUSING) BLOWER SWITCH BRN WIRE DIODE DK BLU WIRE DK GRN WIRE DK GRN/WHT WIRE GAS DIESEL GRY WIRE GRY/BLK WIRE HEATER AND A/C CONTROL MODULE HIGH BLOWER RELAY (UNDER I/P ON TOP OF HEATER-A/C CASE) HOT AT ALL TIMES HOT IN RUN HOT IN RUN OR START IGN MINI FUSE A/C COMP MINI FUSE HOT IN RUN, BULB TEST OR START FUSE BLOCK HTR A/C FUSE 12 IGN E MINI FUSE LT BLU WIRE LT GRN WIRE NCA WIRE OFF LO ORG/ WIRE PNK WIRE PPL REAR DEFOGGER SYSTEM RECIRCULATION DOOR MOTOR (UNDER I/P ON HEATER- A/C CASE) RED WIRE TAN WIRE UNDERHOOD FUSE-RELAY UNDERHOOD FUSE-RELAY CENTER VALVE CTRL AIR TEMP DR SENSOR MODE SIGNAL A/C SWITCH WATER VALVE (SUBURBAN, UTILITY, CREW CAB ONLY) (RIGHT CENTER OF INTAKE AREA) WHT WIRE YEL WIRE

4.3L PNK WIRE 7.4L 6.5L 7.4L W/ CALIFORNIA EMISSIONS OTHERS A/C CLUTCH RELAY A/T M/T AIR BAG FUSE 10 AIR INJECTION REACTION SECONDARY RELAY BACKUP LAMP SWITCH BLK WIRE CAMSHAFT EXHAUST POSITION GAS SENSOR RECIRCULATION VALVE CONVENIENCE CENTER DAYTIME AUDIO RUNNING ALARM MODULE LAMPS RELAY DIESEL ONLY PNK WIRE EGR SOLENOID ELECTROCHROMATIC MIRROR W/ COMPASS ELECTRONIC INJECTION PUMP ENG-1 MINI FUSE EVAPORATIVE EMISSION CANISTER VENT EVAPORATIVE FUEL EMISSIONS PUMP CANISTER PURGE BALANCE SOLENOID VALVE RELAY FROM IGNITION SWITCH (DIAGRAM 2 OF 4) FUEL EGR GLOW WATER-IN- HEATER VENT PLUG FUEL SOLENOID CONTROL SENSOR MODULE FUEL FUEL FUEL INJECTOR INJECTOR INJECTOR FUEL FUEL INJECTOR INJECTOR FUEL INJECTOR FUEL PUMP BALANCE MODULE FUEL SOL MINI FUSE ECM 1 MINI FUSE FUEL TANK DAYTIME SENDER RUNNING I/P MODULE LAMPS CLUSTER MODULE (4.3L) GASOLINE DIESEL 5.0L, 5.7L 4.3L GAUGES FUSE 4 HEATED HEATED MASS OXYGEN OXYGEN AIRFLOW SENSOR 1 SENSOR 2 SENSOR HEATED HEATED OXYGEN OXYGEN SENSOR 4 SENSOR 3 I/P FUSE BLOCK IGN E MINI FUSE IGNITION CRANK- CONTROL SHAFT MODULE POSITION SENSOR IGNITION CRANK- FUEL CONTROL SHAFT INJECTOR MODULE POSITION SENSOR INFLATABLE RESTRAINT I/P MODULE ENABLE SWITCH INFLATABLE RESTRAINT SENSING AND DIAGNOSTIC MODULE M/T MASS AIR FLOW SENSOR NCA WIRE PNK WIRE POWER STEERING CONTROL MODULE POWERTRAIN CONTROL MODULE TRANSFER CASE CONTROL MODULE TURN B/U FUSE 16 TURN SIGNAL SWITCH UNDERHOOD FUSE-RELAY CENTER VEHICLE CONTROL MODULE VEHICLE IGNITION CONTROL COIL MODULE WASTEGATE SOLENOID YEL WIRE

A/C COMP MINI FUSE A/C LOW PRESSURE CUTOUT SWITCH AUXILIARY COOLING FAN RELAY BRN WIRE CONVENIENCE CENTER ECM-B MINI FUSE ECM-I MINI FUSE ELECTRONIC INJECTION PUMP ENG-I MINI FUSE FROM AUX FAN FUSE FROM IGNITION SWITCH FROM MAXI FUSE 6 FUEL PUMP OIL PRESSURE SWITCH/ SENDER FUEL PUMP RELAY FUEL SOL MINI FUSE GLOW PLUG RELAY HIGH BLOWER RELAY HORN MINI FUSE HORN RELAY I/P FUSE BLOCK IGN E MINI FUSE LOW BLOWER RELAY MAXI FUSE 3 MEDIUM BLOWER RELAY ORG/ WIRE PNK WIRE POWERTRAIN CONTROL MODULE (PCM) RADIO RADIO FUSE 17 REAR WIPER FUSE 23 REAR WIPER/ WASHER SWITCH RED WIRE SUBURBAN ONLY SUBURBAN, UTILITY ONLY TO POWER WINDOW CIRCUIT BREAKER UNDER HOOD FUSE-RELAY CENTER UNDERHOOD FUSE-RELAY CENTER UNDERHOOD REEL LAMP WATER EGR IN FUEL SOLENOID SENSOR VALVE WHT WIRE WIPER FUSE 11 WIPER MOTOR MODULE WIPER/ WASHER SWITCH YEL WIRE

4.3L, 5.0L, 5.7L ONLY 5.7L W/ H/D A/T A/C COMP MINI FUSE A/C LOW PRESSURE CUTOUT SWITCH AUXILIARY FUEL COOLING CYCLE FAN CONTROL RELAY MODULE BRN WIRE CONVENIENCE CENTER ECM-B MINI FUSE ECM-I MINI FUSE EGR ELECTRONIC VACUUM REGULATOR SOLENOID ELECTRONIC HEATED SPARK OXYGEN CONTROL SENSOR MODULE ENG-I MINI FUSE EXCEPT 4.3L 5.7L H/D W/ M/T FROM AUX FAN FUSE FROM IGNITION SWITCH FROM MAXI FUSE 6 FUEL INJECTOR 1 FUEL INJECTOR 2 FUEL PUMP OIL PRESSURE SWITCH/ SENDER FUEL PUMP RELAY HIGH BLOWER RELAY HORN MINI FUSE HORN RELAY I/P FUSE BLOCK IGN E MINI FUSE LOW BLOWER RELAY M/T ONLY MAXI FUSE 3 MEDIUM BLOWER RELAY ORG/ WIRE PNK WIRE POWERTRAIN CONTROL MODULE POWERTRAIN CONTROL MODULE (PCM) RADIO RADIO FUSE 17 REAR WIPER FUSE 23 REAR WIPER/ WASHER SWITCH RED WIRE SUBURBAN ONLY SUBURBAN, UTILITY ONLY TO POWER WINDOW CIRCUIT BREAKER UNDER HOOD FUSE-RELAY CENTER UNDERHOOD FUSE-RELAY CENTER UNDERHOOD REEL LAMP WHT WIRE WIPER FUSE 11 WIPER MOTOR MODULE WIPER/ WASHER SWITCH YEL WIRE

413 412 PPL AIR CONDITIONING SYSTEM (A/C COMPRESSOR CLUTCH) BLK WIRE BLK/WHT WIRE BRN WIRE BRN/WHT WIRE CRANK SIGNAL COOLANT TEMP SENS SIG MAP SENSOR SIGNAL DATA LINK CONNECTOR (UNDER LEFT SIDE OF I/P) DISTRIBUTOR REF HI DK BLU WIRE DK GRN WIRE DK GRN/WHT WIRE ECM-B MINI FUSE ECM-I MINI FUSE EGR SOLENOID MIL INDICATOR CTRL ENG-I MINI FUSE FUEL PUMP RELAY CTRL FUEL PUMP SIGNAL INPUT DISTRIBUTOR REF LO GAUGES FUSE 4 GRY WIRE HOT AT ALL TIMES HOT IN RUN OR START HOT IN RUN, BULB TEST OR START HOT IN START I/P FUSE BLOCK CRANK FUSE 8 IAC COIL B LO IAC COIL B HI IAC COIL A HI IAC COIL A LO IDLE AIR CONTROL UNIT (RIGHT REAR OF TBI UNIT) IGN E MINI FUSE IGNITION CONTROL (IC) IC BYPASS OXYGEN SENSOR GROUND OXYGEN SENSOR SIGNAL INJECTOR 1 DRIVER INJECTOR 2 DRIVER INSTRUMENT CLUSTER LT BLU/BLK WIRE LT BLU/WHT WIRE LT GRN WIRE LT GRN/BLK WIRE LT GRN/WHT WIRE NCA WIRE ORG/ WIRE OXYGEN SENSOR (RIGHT SIDE EXHAUST MANIFOLD) PNK 21 22 WIRE PNK WIRE POWERTRAIN CONTROL MODULE (UNDER RIGHT SIDE OF I/P) PPL PPL/WHT WIRE RED/BLK WIRE SERVICE ENGINE SOON INDICATOR SPARK RETARD SIGNAL A/C ON SIGNAL IN SYSTEM GROUND SYSTEM GROUND SENSOR RETURN GROUND TAN WIRE TAN/BLK WIRE THROTTLE BODY FUEL INJECTOR #1 (TOP OF THROTTLE BODY UNIT) THROTTLE BODY FUEL INJECTOR #2 (TOP OF THROTTLE BODY UNIT) TP SENSOR SIGNAL UNDERHOOD FUSE/RELAY CENTER (LEFT REAR OF ENGINE COMPT) UP- SHIFT LAMP UPSHIFT LAMP CTRL DLC SERIAL DATA DLC DIAGNOSTIC TEST VSS BUFFER SIGNAL WHT WIRE WHT/BLK WIRE YEL WIRE YEL/BLK WIRE

413 412 PPL AIR CONDITIONING SYSTEM (A/C COMPRESSOR CLUTCH) BLK WIRE BLK/WHT WIRE BRN WIRE BRN/WHT WIRE CRANK SIGNAL COOLANT TEMP SENS SIG MAP SENSOR SIGNAL DATA LINK CONNECTOR (UNDER LEFT SIDE OF I/P) DISTRIBUTOR REF HI DK BLU WIRE DK GRN WIRE DK GRN/WHT WIRE ECM-B MINI FUSE ECM-I MINI FUSE EGR SOLENOID MIL INDICATOR CTRL ENG-I MINI FUSE FUEL PUMP RELAY CTRL FUEL PUMP SIGNAL INPUT DISTRIBUTOR REF LO GAUGES FUSE 4 GRY WIRE HOT AT ALL TIMES HOT IN RUN OR START HOT IN RUN, BULB TEST OR START HOT IN START I/P FUSE BLOCK CRANK FUSE 8 IAC COIL B LO IAC COIL B HI IAC COIL A HI IAC COIL A LO IDLE AIR CONTROL UNIT (RIGHT REAR OF TBI UNIT) IGN E MINI FUSE IGNITION CONTROL (IC) IC BYPASS OXYGEN SENSOR GROUND OXYGEN SENSOR SIGNAL INJECTOR 1 DRIVER INJECTOR 2 DRIVER INSTRUMENT CLUSTER LT BLU/BLK WIRE LT BLU/WHT WIRE LT GRN WIRE LT GRN/BLK WIRE LT GRN/WHT WIRE NCA WIRE ORG/ WIRE OXYGEN SENSOR (RIGHT SIDE EXHAUST MANIFOLD) PNK 21 22 WIRE PNK WIRE POWERTRAIN CONTROL MODULE (UNDER RIGHT SIDE OF I/P) PPL PPL/WHT WIRE RED/BLK WIRE SERVICE ENGINE SOON INDICATOR SPARK RETARD SIGNAL A/C ON SIGNAL IN SYSTEM GROUND SYSTEM GROUND SENSOR RETURN GROUND TAN WIRE TAN/BLK WIRE THROTTLE BODY FUEL INJECTOR #1 (TOP OF THROTTLE BODY UNIT) THROTTLE BODY FUEL INJECTOR #2 (TOP OF THROTTLE BODY UNIT) TP SENSOR SIGNAL UNDERHOOD FUSE/RELAY CENTER (LEFT REAR OF ENGINE COMPT) UP- SHIFT LAMP UPSHIFT LAMP CTRL DLC SERIAL DATA DLC DIAGNOSTIC TEST VSS BUFFER SIGNAL WHT WIRE WHT/BLK WIRE YEL WIRE YEL/BLK WIRE