Chevrolet Caprice IV (1990-1996) yel/blk Wiring diagrams

3-2 CTRL SOLENOID A/C REFRIG. PRESSURE SENSOR BATTERY FEED CONN B BATTERY FEED PPL SENSOR GND BLK WIRE BLK/WHT WIRE BLU WIRE BRN WIRE BRN/WHT WIRE CASE GND CRUISE CONTROL RELEASE SWITCH DATA LINK CONNECTOR DK BLU WIRE ECTS IN PNK TRANS RANGE A SIG WIRE ELECTRONIC CONTROLLED TRANSMISSION ENGINE COOLANT TEMP SENSOR (FRONT OF ENGINE COMPT, NEXT TO THERMOSTAT HOUSING) FORCE MOTOR LO FORCE MTR CTRL-HI FORCE MTR CTRL-LO GRY WIRE HOT AT ALL TIMES HOT IN RUN, BULB TEST OR START I/P FUSE BLOCK F/P FUSE CHIME FUSE #2 #13 I/P INDC FUSE #11 IAT SENSOR INST CLUSTER LT BLU/WHT WIRE LT GRN WIRE MALFUNCTION INDICATOR LAMP MAP SENSOR MIL CTRL MODE SW A MODE SW B MODE SW C ORG/ WIRE ORG/BLK WIRE OUT/FIELD SERV ENBL PARK/NEUTRAL POSITION SWITCH PARTIAL PCM GND PCM GND CONN C PCM GND PPL VSS GND PCM IGN FEED PNK (BUICK) (CHEVY) WIRE PNK IGN FEED WIRE PNK WIRE PNP SW SIG PPL PPL BRAKE SW SIG PRESSURE SW MANIFOLD RED WIRE RED/BLK WIRE SENSOR GND SERIAL DATA CONN D SHIFT A SOLENOID SHIFT B SOLENOID SHIFT SOL A SHIFT SOL B TAN WIRE TAN/BLK WIRE TAN/WHT WIRE TCC ENABLE SOLENOID TCC ENBL SOL CTRL TCC TEMP SW IN TPS IN TRANS 3-2 CTRL SOL TRANS FLUID TEMP SENSOR TRANS FLUID TEMP SIG TRANS FUSE TRANS RANGE B SIG TRANS RANGE C SIG UNDERHOOD ELECTRICAL CENTER VEHICLE SPEED SENSOR (LEFT REAR OF TRANSMISSION) VSS SIGNAL CONN A WHT WIRE WHT/BLK WIRE YEL WIRE YEL/BLK WIRE

A/C DRL FUSE BLK WIRE BRAKE/ BRN WIRE CHEVY BUICK CHIME FUSE DAYTIME RUNNING LTS (DRL) DROPPING DIODE (ATTACHED TO BRAKE DAYTIME RUNNING LTS (DRL) MODULE (AT RIGHT "A" PILLAR, RIGHT KICK PANEL) DK BLU WIRE DK GRN/WHT WIRE DRL RELAY FUS LINK A GROUND HEAD ON IGNITION HI BEAM IN GROUND LT SENS IN LT SENS IN HEAD RELAY HEADLT AUTO CTRL AMBIENT LT SENS (TOP OF I/P, MOUNTED ON DEFROST GRILL) HEADLT DIMMER HEADLT SW HI BEAM IND INSTRUMENT CLUSTER HI-BEAM IND HOT AT ALL TIMES HOT IN RUN HOT IN RUN, BULB TEST OR START I/P FUSE BLOCK I/P FUSE BLOCK EXT LPS FUSE INSTRUMENT CLUSTER INSTRUMENT CLUSTER BRAKE INDICATOR INTERIOR, EXTERIOR LTS LEFT DUAL BEAM HEADLT LT GRN LT GRN WIRE LT GRN WIRE LT GRN/BLK WIRE NOT USED OFF ORG/ WIRE OUTPUT #1 IGNITION OUTPUT #2 OUTPUT #3 PARK PARK BRAKE SW (ON PARK BRAKE ASSEMBLY) PARK RELAY PEDAL BRACKET) PNK PPL WIRE PNK WIRE RED WIRE RIGHT DUAL BEAM HEADLT SUPPORT, FORWARD OF BATTERY) TAN WIRE TAN/WHT WIRE UNDERHOOD ELECTRICAL CENTER YEL WIRE YEL/BLK WIRE YEL/WHT WIRE

AMBIENT LT SENSOR INPUT BLK WIRE BLK/WHT 1491 WIRE BLK/WHT WIRE BRN WIRE CONN 1 CONN 2 DK GRN/WHT WIRE EXT LPS FUSE EXTERIOR LTS FUS LINK A (UNDERHOOD ELECTRICAL CENTER) GROUND HEAD HEADLT AUTO CONTROL MODULE (ABOVE BASE OF STEERING COLUMN) HEADLT AUTO CTRL AMBIENT LT SENSOR HEADLT DIMMER HEADLT SW HI BEAM GROUND B+ HI-BEAM IND HOT AT ALL TIMES HOT IN RUN, BULB TEST OR START I/P FUSE BLOCK CHIME FUSE INSTRUMENT CLUSTER INTERIOR, EXTERIOR LTS INTERNAL HEAD RELAY INTERNAL PARK RELAY LEFT DUAL BEAM HEADLT LT GRN LT GRN WIRE LT GRN WIRE LT GRN/BLK WIRE LTS ON INPUT LTS ON WARNING INPUT IGNITION DELAY ON/OFF OUTPUT #2 OUTPUT #1 MAX MIN PPL NOT USED OFF ORG/ WIRE PARK PNK PPL WIRE PNK WIRE RED WIRE RIGHT DUAL BEAM HEADLT TAN WIRE TWILIGHT SENTINEL SW WARNING ALARM (CONVENIENCE CENTER) YEL WIRE YEL/BLK WIRE

"PASSKEY" INDICATOR BLK/WHT WIRE BULB TEST CLUS CHI FUSE #33 CRANK FUSE CRANKING FUEL ENABLE INPUT DK BLU WIRE FUEL ENABLE GROUND GRY WIRE HOT AT ALL TIMES HOT IN RUN I/P FUSE BLOCK IGNITION KEY IGNITION KEY LOCK CYLINDER IGNITION SWITCH INSTRUMENT CLUSTER KEY RES IN (HI) KEY RES IN (LO) LOCK OFF NCA WIRE ORG/ WIRE PASS-KEY FUSE #14 PASS-KEY FUSE #34 PNK IGN WIRE PNK WIRE POWERTRAIN CONTROL MODULE (FORWARD OF LEFT WHEELHOUSE, UNDER AIR CLEANER) PPL PPL/WHT WIRE RESISTOR PELLET RUN WIRE SECURITY IND CTRL SIDE OF I/P) STARTER ENABLE CTRL STARTER SOLENOID SUPPLEMENTAL RESTRAINT SYSTEM PPL THEFT DETERRENT MODULE (BEHIND LEFT THEFT DETERRENT RELAY (BEHIND LEFT SIDE OF I/P) WHT/BLK WIRE YEL WIRE YEL/BLK WIRE

5 VOLTS REF 5 VOLTS REF PNK IGNITION WIRE A/C CLUTCH STATUS A/C COMPRESSOR RELAY A/C REQUEST SIG AIR CONDITIONING SYSTEM AIR PUMP RELAY CTRL BATTERY BATTERY PPL SENSOR GROUND BLK WIRE BLK/WHT WIRE BRN WIRE BRN/WHT WIRE COIL CONN B COOLANT FAN RELAYS CRUISE CONTROL, SPEEDO, RADIO, WARNING ALARM, CENT CTRL MODULE DIST IGNITION FEED DIST REF LOW SIG DK BLU WIRE DK BLU/WHT WIRE DK GRN WIRE DK GRN/WHT WIRE EGR SOLENOID CTRL ELECTRICAL ENG OIL LEVEL SENSOR SIG ENG OIL RESET SW ENGINE OIL CHANGE RESET SWITCH (NEXT TO I/P FUSE) ENGINE OIL LEVEL SENSOR (LEFT SIDE OF ENGINE OIL PAN) F/P FUSE #2 FUEL ENABLE SIG FUEL INJ FUSE #6 FUEL INJ FUSE #9 FUEL INJECTOR 1 FUEL INJECTOR 2 FUEL INJECTOR 3 FUEL INJECTOR 4 FUEL INJECTOR 5 FUEL INJECTOR 6 FUEL INJECTOR 7 FUEL INJECTOR 8 FUEL PUMP RELAY CTRL GROUND GRY WIRE HIGH RES DISTRIBUTOR HIGH RESOLUTION SIG HOT AT ALL TIMES HOT IN RUN OR START HOT IN RUN, BULB TEST OR START IGN IGNITION CTRL INJ 1 CTRL INJ 2 CTRL INJ 3 CTRL INJ 4 CTRL INJ 5 CTRL INJ 6 CTRL INJ 7 CTRL INJ 8 CTRL INSTRUMENT CLUSTERS INTERFACE CIRCUIT LOW OIL IND CTRL LOW RES LOW RESOLUTION SIG LT BLU/BLK WIRE LT GRN WIRE LT GRN/BLK WIRE MAF SENSOR SIG MASS AIR FLOW SENSOR (BETWEEN AIR CLEANER AND INTAKE RESONATOR) OPTICAL SENSOR ORG/ WIRE ORG/BLK WIRE PCM GROUND PIPE) PNK WIRE PNK/BLK WIRE POWER STEERING PRESSURE SWITCH (IN POWER STEERING LINE NEAR POWER UNIT) POWERTRAIN CONTROL MODULE (FORWARD OF LEFT WHEELHOUSE, UNDER AIR CLEANER) PPL PPL VSS GROUND PRI COOL FAN RELAY CTRL PSP SWITCH IN RED WIRE RED/BLK WIRE REF LOW SEC COOL FAN RELAY CTRL SENSOR GROUND SPARK PLUGS SYSTEM TAN/WHT WIRE TCC TEMP SWITCH TCC TEMP SWITCH SIG THEFT DETERENT MODULE TRANS 1-2 SHIFT CTRL TRANS 2-3 SHIFT CTRL TRANS 3-2 SHIFT CTRL TRANS FUSE #5 UNDER- HOOD VEHICLE SPEED SENSOR VSS OUT VSS SIGNAL CONN A WHT WIRE YEL WIRE YEL/BLK WIRE

AIR FUSE #3 ASSEMBLY BLK WIRE BLK/WHT WIRE BRN WIRE CHIME FUSE #13 CRUISE CONTROL RELEASE SWITCH (ATTACHED TO BRAKE PEDAL BRACKET) DK BLU WIRE DK GRN/WHT WIRE ECT SENSOR SIG EGR SOLENOID VALVE (TOP OF ENGINE BEHIND INJ #7) EMI FUSE #4 ENGINE COOLANT TEMPERATURE SENSOR (RIGHT FRONT OF ENGINE) EVAPORATIVE EMISSION CANISTER PURGE SOLENOID VALVE (TOP OF ENGINE BEHIND INJ #4) GRY WIRE HEATED OXYGEN SENSOR 1 (BANK 1, LEFT EXHAUST MANIFOLD) HEATED OXYGEN SENSOR 2 (BANK 2, RIGHT EXHAUST MANIFOLD) HOT AT ALL TIMES HOT IN RUN, BULB TEST OR START IAC COIL "A" LOW IAC COIL "B" LOW IAC COIL A HI IAC COIL B HI IAT SENSOR SIG IDLE AIR CONTROL MOTOR (RIGHT FRONT OF THROTTLE BODY) INTAKE AIR TEMPERATURE SENSOR (AIR CLEANER LT BLU/BLK WIRE LT BLU/WHT WIRE LT GRN WIRE LT GRN/BLK WIRE LT GRN/WHT WIRE MANIFOLD ABSOLUTE PRESSURE SENSOR MAP SENSOR SIG NCA WIRE NEXT TO THERMOSTAT HOUSING) ORG/ WIRE ORG/BLK WIRE PCM GROUND CONN C PNK PPL WIRE PNK TRANS RANGE SIG A WIRE PNK WIRE PNP SIG POWERTRAIN CONTROL MODULE (FORWARD OF LEFT WHEELHOUSE, UNDER AIR CLEANER) PPL PPL BRAKE SWITCH SIG PPL/WHT WIRE RED WIRE RED/BLK WIRE SECONDARY AIR INJECTION (AIR) PUMP (LOWER RIGHT SIDE OF ENGINE BLOCK) SECONDARY AIR INJECTOR (AIR) PUMP RELAY TAN WIRE TAN/WHT WIRE THROTTLE POSITION SENSOR (ATTACHED TO RIGHT SIDE THROTTLE BODY) TP SENSOR SIG TRANS PRESS CTRL SOL HI TRANS RANGE SIG B TRANS RANGE SIG C UNDER- HOOD ELECTRICAL CENTER WHT WIRE YEL WIRE YEL/BLK WIRE

1-2 SHIFT SOLENOID 2-3 SHIFT SOLENOID 3-2 CTRL SOLENOID (PWM) A/C CLUTCH CTRL A/C COMPRESSOR RELAY A/C PRESS SENSOR SIG A/C REFRIGERANT PRESSURE SENSOR (IN HI PRESSURE LINE ABOVE RIGHT WHEELHOUSE) AUTOMATIC TRANSMISSION BLK WIRE BLK/WHT WIRE BLOCK, BELOW BLOCK, FORWARD BRN WIRE BRN/WHT WIRE CANISTER PURGE CTRL COMPARTMENT) CONN D DATA LINK CONNECTOR DK BLU WIRE DK GRN/WHT WIRE EXHAUST MANIFOLD) FUEL PUMP PRIMING CONNECTOR (NEAR A/C ACCUMULATOR) FUEL PUMP/ LEVEL SENDER (IN FUEL FUEL PUMP/ OIL PRESSURE SWITCH (TOP OF ENGINE AT REAR) GROUND GRY WIRE HOT AT ALL TIMES HOT IN RUN, BULB TEST OR START I/P FUSE #2 I/P INDC FUSE #11 IGNITION COIL (FRONT OF ENGINE) IGNITION COIL MODULE (FRONT OF ENGINE) COIL DRIVER IGN IGN CTRL INSTRUMENT CLUSTER INSTRUMENT CLUSTER SYSTEM KNOCK SENSOR SIG LEFT KNOCK SENSOR LT BLU/WHT WIRE LT GRN WIRE MALFUNCTION INDICATOR MIL CTRL OF STARTER) ORG/ WIRE ORG/BLK WIRE OUTPUT/FIELD SERV ENBL PARK/NEUTRAL POSITION SWITCH (NEAR BASE OF STEERING COLUMN) PCM GROUND PNK CHANGE OIL IND CTRL WIRE PNK WIRE PNK/BLK WIRE POWERTRAIN CONTROL MODULE (FORWARD OF LEFT WHEELHOUSE, UNDER AIR CLEANER) PPL PRESSURE CONTROL SOLENOID RED WIRE RED/BLK WIRE RIGHT KNOCK SENSOR SERIAL DATA SW A SW B SW C TAN WIRE TAN/BLK WIRE TANK) TCC SOLENOID TRANS FLUID TEMP SENSOR TRANS FLUID TEMP SIG TRANS FUSE #5 TRANS PRESS CTRL LOW PNK IGNITION WIRE TRANS TCC CTRL UNDER- HOOD ELECTRICAL CENTER WHT WIRE WHT/BLK WIRE YEL/BLK WIRE

5 VOLTS REF 5 VOLTS REF PNK IGNITION WIRE A/C CLUTCH STATUS A/C COMPRESSOR RELAY A/C REQUEST SIG AIR CONDITIONING SYSTEM AIR PUMP RELAY CTRL BATTERY BATTERY PPL SENSOR GROUND BLK WIRE BLK/WHT WIRE BRN WIRE BRN/WHT WIRE COIL CONN B COOLANT FAN RELAYS CRUISE CONTROL, SPEEDO, RADIO, WARNING ALARM, CENT CTRL MODULE DIST IGNITION FEED DIST REF LOW SIG DK BLU WIRE DK BLU/WHT WIRE DK GRN WIRE DK GRN/WHT WIRE EGR SOLENOID CTRL ELECTRICAL ENG OIL LEVEL SENSOR SIG ENG OIL RESET SW ENGINE OIL CHANGE RESET SWITCH (NEXT TO I/P FUSE) ENGINE OIL LEVEL SENSOR (LEFT SIDE OF ENGINE OIL PAN) F/P FUSE #2 FUEL ENABLE SIG FUEL INJ FUSE #6 FUEL INJ FUSE #9 FUEL INJECTOR 1 FUEL INJECTOR 2 FUEL INJECTOR 3 FUEL INJECTOR 4 FUEL INJECTOR 5 FUEL INJECTOR 6 FUEL INJECTOR 7 FUEL INJECTOR 8 FUEL PUMP RELAY CTRL GROUND GRY WIRE HIGH RES DISTRIBUTOR HIGH RESOLUTION SIG HOT AT ALL TIMES HOT IN RUN OR START HOT IN RUN, BULB TEST OR START IGN IGNITION CTRL INJ 1 CTRL INJ 2 CTRL INJ 3 CTRL INJ 4 CTRL INJ 5 CTRL INJ 6 CTRL INJ 7 CTRL INJ 8 CTRL INSTRUMENT CLUSTERS INTERFACE CIRCUIT LOW OIL IND CTRL LOW RES LOW RESOLUTION SIG LT BLU/BLK WIRE LT GRN WIRE LT GRN/BLK WIRE MAF SENSOR SIG MASS AIR FLOW SENSOR (BETWEEN AIR CLEANER AND INTAKE RESONATOR) OPTICAL SENSOR ORG/ WIRE ORG/BLK WIRE PCM GROUND PIPE) PNK WIRE PNK/BLK WIRE POWER STEERING PRESSURE SWITCH (IN POWER STEERING LINE NEAR POWER UNIT) POWERTRAIN CONTROL MODULE (FORWARD OF LEFT WHEELHOUSE, UNDER AIR CLEANER) PPL PPL VSS GROUND PRI COOL FAN RELAY CTRL PSP SWITCH IN RED WIRE RED/BLK WIRE REF LOW SEC COOL FAN RELAY CTRL SENSOR GROUND SPARK PLUGS SYSTEM TAN/WHT WIRE TCC TEMP SWITCH TCC TEMP SWITCH SIG THEFT DETERENT MODULE TRANS 1-2 SHIFT CTRL TRANS 2-3 SHIFT CTRL TRANS 3-2 SHIFT CTRL TRANS FUSE #5 UNDER- HOOD VEHICLE SPEED SENSOR VSS OUT VSS SIGNAL CONN A WHT WIRE YEL WIRE YEL/BLK WIRE

AIR FUSE #3 ASSEMBLY BLK WIRE BLK/WHT WIRE BRN WIRE CHIME FUSE #13 CRUISE CONTROL RELEASE SWITCH (ATTACHED TO BRAKE PEDAL BRACKET) DK BLU WIRE DK GRN/WHT WIRE ECT SENSOR SIG EGR SOLENOID VALVE (TOP OF ENGINE BEHIND INJ #7) EMI FUSE #4 ENGINE COOLANT TEMPERATURE SENSOR (RIGHT FRONT OF ENGINE) EVAPORATIVE EMISSION CANISTER PURGE SOLENOID VALVE (TOP OF ENGINE BEHIND INJ #4) GRY WIRE HEATED OXYGEN SENSOR 1 (BANK 1, LEFT EXHAUST MANIFOLD) HEATED OXYGEN SENSOR 2 (BANK 2, RIGHT EXHAUST MANIFOLD) HOT AT ALL TIMES HOT IN RUN, BULB TEST OR START IAC COIL "A" LOW IAC COIL "B" LOW IAC COIL A HI IAC COIL B HI IAT SENSOR SIG IDLE AIR CONTROL MOTOR (RIGHT FRONT OF THROTTLE BODY) INTAKE AIR TEMPERATURE SENSOR (AIR CLEANER LT BLU/BLK WIRE LT BLU/WHT WIRE LT GRN WIRE LT GRN/BLK WIRE LT GRN/WHT WIRE MANIFOLD ABSOLUTE PRESSURE SENSOR MAP SENSOR SIG NCA WIRE NEXT TO THERMOSTAT HOUSING) ORG/ WIRE ORG/BLK WIRE PCM GROUND CONN C PNK PPL WIRE PNK TRANS RANGE SIG A WIRE PNK WIRE PNP SIG POWERTRAIN CONTROL MODULE (FORWARD OF LEFT WHEELHOUSE, UNDER AIR CLEANER) PPL PPL BRAKE SWITCH SIG PPL/WHT WIRE RED WIRE RED/BLK WIRE SECONDARY AIR INJECTION (AIR) PUMP (LOWER RIGHT SIDE OF ENGINE BLOCK) SECONDARY AIR INJECTOR (AIR) PUMP RELAY TAN WIRE TAN/WHT WIRE THROTTLE POSITION SENSOR (ATTACHED TO RIGHT SIDE THROTTLE BODY) TP SENSOR SIG TRANS PRESS CTRL SOL HI TRANS RANGE SIG B TRANS RANGE SIG C UNDER- HOOD ELECTRICAL CENTER WHT WIRE YEL WIRE YEL/BLK WIRE

1-2 SHIFT SOLENOID 2-3 SHIFT SOLENOID 3-2 CTRL SOLENOID (PWM) A/C CLUTCH CTRL A/C COMPRESSOR RELAY A/C PRESS SENSOR SIG A/C REFRIGERANT PRESSURE SENSOR (IN HI PRESSURE LINE ABOVE RIGHT WHEELHOUSE) AUTOMATIC TRANSMISSION BLK WIRE BLK/WHT WIRE BLOCK, BELOW BLOCK, FORWARD BRN WIRE BRN/WHT WIRE CANISTER PURGE CTRL COMPARTMENT) CONN D DATA LINK CONNECTOR DK BLU WIRE DK GRN/WHT WIRE EXHAUST MANIFOLD) FUEL PUMP PRIMING CONNECTOR (NEAR A/C ACCUMULATOR) FUEL PUMP/ LEVEL SENDER (IN FUEL FUEL PUMP/ OIL PRESSURE SWITCH (TOP OF ENGINE AT REAR) GROUND GRY WIRE HOT AT ALL TIMES HOT IN RUN, BULB TEST OR START I/P FUSE #2 I/P INDC FUSE #11 IGNITION COIL (FRONT OF ENGINE) IGNITION COIL MODULE (FRONT OF ENGINE) COIL DRIVER IGN IGN CTRL INSTRUMENT CLUSTER INSTRUMENT CLUSTER SYSTEM KNOCK SENSOR SIG LEFT KNOCK SENSOR LT BLU/WHT WIRE LT GRN WIRE MALFUNCTION INDICATOR MIL CTRL OF STARTER) ORG/ WIRE ORG/BLK WIRE OUTPUT/FIELD SERV ENBL PARK/NEUTRAL POSITION SWITCH (NEAR BASE OF STEERING COLUMN) PCM GROUND PNK CHANGE OIL IND CTRL WIRE PNK WIRE PNK/BLK WIRE POWERTRAIN CONTROL MODULE (FORWARD OF LEFT WHEELHOUSE, UNDER AIR CLEANER) PPL PRESSURE CONTROL SOLENOID RED WIRE RED/BLK WIRE RIGHT KNOCK SENSOR SERIAL DATA SW A SW B SW C TAN WIRE TAN/BLK WIRE TANK) TCC SOLENOID TRANS FLUID TEMP SENSOR TRANS FLUID TEMP SIG TRANS FUSE #5 TRANS PRESS CTRL LOW PNK IGNITION WIRE TRANS TCC CTRL UNDER- HOOD ELECTRICAL CENTER WHT WIRE WHT/BLK WIRE YEL/BLK WIRE