Buick Roadmaster VIII (1991-1996) blk/wht Wiring diagrams

4 11 PPL 8 12 10 PNK WIRE ABS FUSE ABS IND. BLK WIRE BLK/WHT WIRE BPMV PUMP MOTOR RELAY BPMV SOLENOID VALVE RELAY BRAKE APPLIED INPUT BRAKE PRESSURE MODULATOR VALVE (BPMV) (LEFT OF ALTERNATOR) BRN WIRE CHEVROLET BUICK DATA LINK CONN (DLC) (ATTACHED TO I/P CARRIER, RIGHT OF STEERING COLUMN) DK BLU WIRE DK BLU/WHT WIRE DK GRN WIRE ELECTRONIC BRAKE CONTROL MODULE (EBCM) (LEFT I/P, ABOVE CONVENIENCE CENTER) FUSE BLOCK FUSE LINK B (18 GA-RUST) (RIGHT ENGINE COMPT, BOLTED TO BATTERY JUNCTION BLOCK) GROUND RIGHT FRONT VALVE GROUND SENSOR GROUND GROUND SHIELD 5 6 7 8 9 873 1810 LFT FRT WHL SPEED SENS REAR AXLE SPEED HOT AT ALL TIMES HOT IN HOT IN RUN, BULB TEST OR START I/P INDIC FUSE INSTRUMENT CLUSTER LEFT FRONT VALVE SOLENOID LEFT FRONT WHEEL SPEED SENSOR NCA WIRE ORG/ WIRE PNK 1 2 3 4 IGNITION FEED LEFT FRONT VALVE WIRE PNK WIRE PNK/WHT WIRE PPL PPL/WHT WIRE PUMP ON INPUT REAR AXLE SPEED SENSOR REAR VALVE SOLENOID RED WIRE RETURN PUMP MOTOR RIGHT FRONT VALVE SOLENOID RIGHT FRONT WHEEL SPEED SENSOR RT FRT WHL SPEED SENS RUN WIRE SENSOR GROUND SHIELD 10 11 12 13 14 15 16 17 18 19 20 21 SHIELD 22 23 24 25 26 27 28 29 30 31 32 33 34 35 STOP LT SW (ATTACHED TO BRAKE PEDAL BRACKET) STOP/HAZ FUSE SUPPLY VOLTAGE REAR VALVE CONTROL TAN WIRE WHT WIRE YEL WIRE

4000 PULSES/MILE BATTERY BLK/WHT WIRE BRN WIRE BUICK ONLY CHEVY BUICK CRUISE CONTROL IND CRUISE CONTROL MODULE (FASTENED TO LEFT CRUISE CONTROL RELEASE SW (ON BRAKE PEDAL SUPPORT) CRUISE FUSE CRUISE STATUS VSS INPUT CRUISE SW DISTANCE TRAVELED INPUT DK BLU WIRE DK GRN WIRE DK GRN/WHT 817 WIRE DK GRN/WHT WIRE F/P FUSE TRANS FUSE FRONT WHEEL HOUSE) GROUND GRY WIRE HAZARD LAMP FLASHER HOT AT ALL TIMES HOT IN RUN, BULB TEST OR I/P INDIC FUSE IGNITION SIG INST PANEL FUSE BLOCK INSTRUMENT CLUSTER MULTIFUNCTION LEVER NCA WIRE OF LEFT CYLINDER HEAD) OFF OFF ON ORG/ WIRE PNK PNK PPL WIRE PNK PNK WIRE PNK WIRE POWERTRAIN CONTROL MODULE (PCM) PPL SET R/A SW STOP/HZD FUSE STOPLAMP SW (ON BRAKE PEDAL SUPPORT) VEHICLE SPEED INPUT VEHICLE SPEED SENSOR VSS INPUT/LO VSS INPUT/HI WARNING ALARM MODULE WHT WIRE YEL WIRE

BLK/WHT WIRE BUICK ONLY DATA LINK CONNECTOR DIAGNOSTIC REQUEST INPUT ELECTRONIC BRAKE CONTROL MODULE HEATER-A/C CONTROL INFLATABLE RESTRAINT DIAGNOSTIC ENERGY RESERVE MODULE OUTPUT/ FIELD ENABLE P/S PUMP EVO ACTUATOR POWER STEERING CONTROL MODULE POWER STEERING RESERVOIR POWERTRAIN CONTROL MODULE PULSE WIDTH MODULATED OUTPUT SERIAL DATA LINE TAN WIRE WHT WIRE WHT/BLK WIRE YEL WIRE

BLK WIRE BLK/WHT WIRE GROUND HEAD HEADLT DIMMER HEADLT SW HI-BEAM IND HOT AT ALL TIMES INSTRUMENT CLUSTER LEFT DUAL BEAM HEADLT LT GRN LT GRN WIRE LT GRN WIRE NOT USED OFF PARK RIGHT DUAL BEAM HEADLT TAN WIRE YEL 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

ABS INDICATOR VOLTS INDICATOR AIR BAG INDICATOR BLK WIRE BLK/WHT WIRE BRAKE INDICATOR BRAKE PRESSURE MODULATOR VALVE BRAKE PRESSURE SWITCH BRN WIRE BRN/WHT WIRE BULB TEST BULB TEST OFF CHANGE OIL IND CTRL CHANGE OIL INDICATOR CONVENIENCE CENTER CRUISE CONTROL MODULE ABS IND. CTRL CRUISE INDICATOR DK BLU WIRE DK GRN WIRE ELECTRONIC BRAKE CONTROL MODULE ABS IND. CTRL ENGINE COOLANT TEMPER- ATURE GAUGE ENGINE COOLANT TEMPERATURE SENDER ENGINE OIL LEVEL SWITCH FASTEN BELTS IND CTRL FASTEN SEAT BELT HI BEAM INDICATOR INDICATOR FUEL GAUGE FUSE BLOCK- I/P GATE AJAR INDI- CATOR GENERATOR GRY WIRE HEADLIGHTS SYSTEM HOT AT ALL TIMES FUSE BLOCK:I/P CLUS CHI FUSE HOT COOLANT TEMP. INDI- CATOR HOT IN RUN, BULB TEST OR START I/P INDC FUSE IGNITION SWITCH ILLUMIN- ATION (6 BULBS) INFLATABLE RESTRAINT DIAGNOSTIC ENERGY RESERVE MODULE INSTRUMENT CLUSTER LEFT TURN INDI- CATOR PASS- KEY INDI- CATOR LOCK OFF LOW COOLANT LEVEL INDICATOR LOW ENGINE COOLANT INDICATOR PROBE LOW FUEL INDI- CATOR LOW OIL IND. CTRL OIL LEVEL INPUT LOW OIL LEVEL INDICATOR LOW WASH FLUID INDI- CATOR LOW WASH FLUID LEVEL SWITCH LT BLU WIRE LT GRN WIRE MALFUNCTION INDICATOR OIL PRESSURE INDICATOR OIL PRESSURE SWITCH ORG/ WIRE PARK BRAKE IN (RIGHT KICK PANEL) PARK BRAKE SWITCH LOCK PASS- KEY IND. CTRL PNK WIRE POWERTRAIN CONTROL MODULE POWERTRAIN CONTROL MODULE MIL IND. CTRL PPL PPL DAYTIME RUNNING LIGHTS MODULE PPL BRAKE IND. CTRL REAR COMPT COURTESY LAMPS RIGHT TURN INDICATOR RUN WIRE SENDER (MOUNTED IN FUEL TANK) SIR IND. CTRL SOLID STATE SPEEDO- METER TAILGATE AJAR SWITCH TAN WIRE TAN/WHT WIRE VEHICLE SPEED OUTPUT VOLTS IND CTRL W/ DRL W/O DRL WAGON ONLY WARNING ALARM (LEFT I/P, LEFT OF STEERING COLUMN) WHT WIRE YEL 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