Buick Roadmaster VIII (1991-1996) org/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

BLK WIRE BLK/WHT WIRE BRN WIRE DEFLATE DEFLATE RELAY DK BLU WIRE DK BLU/WHT WIRE DK GRN WIRE DRIVER SEAT DRIVER SEAT BACK LUMBAR SUPPORT SWITCHES DRIVER SEAT LUMBAR DRIVER SEAT PNEUMATIC CONTROL MANIFOLD (BELOW LEFT FRONT SEAT) GRY WIRE HOT AT ALL TIMES I/P FUSE BLOCK INFLATE INFLATE RELAY LOWER INFLATE DEFLATE LOWER LUMBAR BLADDER LOWER LUMBAR BLADER LOWER LUMBAR SOLENOID VALVE MIDDLE DEFLATE MIDDLE LUMBAR BLADDER MIDDLE LUMBAR BLADER MIDDLE LUMBAR SOLENOID VALVE ORG/ WIRE ORG/BLK WIRE PASSENGER SEAT PASSENGER SEAT BACK LUMBAR SUPPORT SWITCHES PASSENGER SEAT LUMBAR IN-LINE PASSENGER SEAT PNEUMATIC CONTROL MANIFOLD (BELOW RIGHT FRONT SEAT) POWER SEAT PNEUMATIC CONTROL MODULE (BELOW RIGHT FRONT SEAT) PPL PRESSURE VACUUM PUMP ASSEMBLY (BELOW RIGHT FRONT SEAT) PUMP CUTOFF RELAY (SOLID PWR ST CIRCUIT BREAKER SENSOR SWITCH STATE UPPER UPPER DEFLATE UPPER LUMBAR BLADDER UPPER LUMBAR BLADER UPPER LUMBAR SOLENOID VALVE WHT WIRE

BUICK W/ LUMBAR SEATS CHEVROLET CHEVROLET BUICK DOOR LOCK RELAY DRIVER'S SEAT LUMBAR IN-LINE FUSE ENDGATE RELAY FROM UNDERHOOD ELECTRICAL CENTER I/P FUSE BLOCK LEFT LUMBAR/RECLINER SWITCH ASSEMBLY LEFT POWER SEAT SWITCH LEFT RECLINER SWITCH LH LUMBAR SWITCHES OPTIONAL ORG/ WIRE ORG/BLK WIRE PASSENGER SEAT LUMBAR IN-LINE FUSE POWER SEAT PNEUMATIC CONTROL MODULE PWR ST CIRCUIT BREAKER #3 RED WIRE RIGHT LUMBAR SWITCHES RIGHT LUMBAR/RECLINER SWITCH ASSEMBLY RIGHT POWER SEAT SWITCH RIGHT RECLINER SWITCH SEO W/ POWER SEATS W/O POWER SEATS

ACCESSORY SWITCH PANEL (LEFT I/P) BLK WIRE BLK/WHT WIRE CONVENIENCE CENTER DK BLU WIRE END GATE RELEASE RELAY HOT AT ALL TIMES I/P FUSE BLOCK LIFTGATE WIPER LATCH SWITCH ORG/ WIRE ORG/BLK WIRE PARK/ NEUTRAL POSITION SWITCH (ON STEERING COLUMN) REAR GLASS RELEASE ACTUATOR REAR GLASS RELEASE SWITCH REAR REL FUSE TAILGATE LOCK SENSE SWITCH (CLOSED IN UNLOCK) UNLOCK WHT WIRE

ACCESSORY SWITCH PANEL (LEFT I/P) BLK WIRE BLK/WHT WIRE CONVENIENCE CENTER DK BLU WIRE END GATE RELEASE RELAY HOT AT ALL TIMES I/P FUSE BLOCK LIFTGATE WIPER LATCH SWITCH ORG/ WIRE ORG/BLK WIRE PARK/ NEUTRAL POSITION SWITCH (ON STEERING COLUMN) REAR GLASS RELEASE SOLENOID REAR GLASS RELEASE SWITCH REAR REL FUSE REMOTE CONTROL DOOR LOCK RECEIVER (LEFT FRONT OF REAR COMPT) TAILGATE LOCK SENSE SWITCH (CLOSED IN UNLOCK) W/ KEYLESS ENTRY WHT WIRE

BACK BLK WIRE DRIVER SEAT LUMBAR/RECLINE SWITCH ASSEMBLY DRIVER SEAT RECLINE MOTOR (PART OF DRIVER SEAT BOTTOM) DRIVER SEAT RECLINE SWITCH GRY/BLK WIRE HOT AT ALL TIMES I/P FUSE BLOCK ORG/ WIRE ORG/BLK WIRE PASSENGER SEAT RECLINE MOTOR (PART OF PASS- ENGER SEAT BOTTOM) PASSENGER SEAT RECLINE SWITCH PNK/WHT WIRE PWR ST CIRCUIT BREAKER

BLK WIRE BLK/WHT WIRE CONVENIENCE CENTER FUSE BLOCK- I/P HOT AT ALL TIMES ORG/ WIRE ORG/BLK WIRE PARK/ NEUTRAL POSITION SWITCH REAR REL FUSE REMOTE CONTROL DOOR LOCK RECEIVER TRUNK LID RELEASE RELAY TRUNK LID RELEASE SOLENOID TRUNK LID RELEASE SWITCH

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