Buick Roadmaster VIII (1991-1996) underhood electrical center 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

4.5-7 MINUTES MAXIMUM. C-CLOSES WITH VEHICLE TOO LOW. AUTOMATIC CONTROL LEVEL SENSOR BLK WIRE COM- PRESSOR MOTOR RELAY COMPRESSOR MOTOR COMPRESSOR SIGNAL ELC FUSE EXHAUST EXHAUST SOLENOID EXHAUST VALVE FROM ACTU- ATOR ARM HOT AT ALL TIMES HOT IN RUN, BULB TEST OR START HOT AT ALL TIMES LEVEL CONTROL FUSE INT/LPS FUSE I/P FUSE BLOCK LEVEL NCA WIRE NORMAL ORG/ WIRE PNK WIRE POWER SOLID STATE RESET+ TOO LOW TOO HIGH UNDERHOOD ELECTRICAL CENTER VENT WHT WIRE YEL 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

AUXILIARY DOME LAMP BASE OF LH "A" PILLAR BEHIND KICKPAD BATTERY BLK WIRE BLOWER MOTOR CONTROL MODULE BODY 1 FUSE #10 BODY 2 FUSE #11 BUICK (CHEVROLET WAGON, ALL BUICK) SEDAN BUICK SEDAN WAGON CHEVROLET CLUST CHI FUSE #33 PASSKEY FUSE #34 CONVENIENCE CENTER CTSY PWR LOCK FUSE 35 DOME LAMP GENERATOR HAZARD LAMP FLASHER HEATER-A/C CONTROL HIGH BLOWER RELAY HVAC MOD FUSE #40 I/P CLUSTER I/P COMPARTMENT LAMP I/P COMPARTMENT LAMP SWITCH I/P FUSE BLOCK INT LPS FUSE #27 LEFT FRONT DOOR LOCK SWITCH LEFT REAR COURTESY LAMP COURTESY LAMP RELAY CONVENIENCE CENTER LEFT ROOF RAIL COURTESY AND READING LAMP LH FRONT DOOR COURTESY LAMP RH FRONT DOOR COURTESY LAMP LH REAR DOOR COURTESY LAMP LIFTGATE WIPER LATCH SWITCH REMOTE CONTROL DOOR LOCK RECEIVER MERCURY SWITCH NCA WIRE ORG/ WIRE PRIMARY COOLING FAN RELAY PRMRY CLG FAN FUSE #12 RADIO RADIO POWER ANTENNA RELAY REAR COMPARTMENT COURTESY LAMP AUTOMATIC LEVEL CONTROL SENSOR REAR COMPARTMENT LID RELEASE RELAY REAR WINDOW DEFOGGER RELAY REAR WINDOW DEFOGGER SWITCH REAR WINDOW WIPER MOTOR REAR COMPARTMENT LID PULL-DOWN ACTUATOR RED WIRE RH I/P DOOR LAMP LH I/P DOOR LAMP RIGHT FRONT DOOR LOCK SWITCH RIGHT REAR COURTESY LAMP RIGHT ROOF RAIL COURTESY AND READING LAMP INSIDE REARVIEW MIRROR RIGHT SUNSHADE ILLUMINATED MIRROR RR DEFG CIRCUIT BREAKER #4 RR REL FUSE #29 CIG FUSE #28 SCNDRY CLG FAN FUSE #13 SECONDARY COOLING FAN RELAY UNDERHOOD ELECTRICAL CENTER SEDAN SEO STARTER SOLENOID STOP LAMP SWITCH STOP/ HZD FUSE #37 THEFT DETERRENT MODULE TO FUSIBLE LINKS A, B TO I/P FUSE BLOCK TO IGNITION SWITCH TRK PDWN -OR- RR WIPER FUSE #36 UNDERHOOD ELECTRICAL CENTER W/KEYLESS WAGON ENTRY WAGON WARNING ALARM

#1 #4 #6 #7 #3 #2 A/C COMPRESSOR RELAY SECONDARY ENGINE COOLING FAN RELAY AIR FUSE #3 AUTOMATIC LEVEL CONTROL AIR COMPRESSOR BASE BRAKE PRESSURE MODULATOR VALVE BRN WIRE CHEVROLET CHEVROLET BUICK CONVENIENCE CENTER DIMMER SWITCH DIMMER SWITCH BUICK ELC FUSE #1 EMI FUSE #4 EVAPORATIVE EMISSION CANISTER PURGE VALVE EXT LPS FUSE 31 F/P FUSE #2 FROM BATTERY FROM IGNITION SWITCH FROM IGNITION SWITCH HEADLAMP SWITCH FRONT LAMPS FUEL INJECTORS FUEL INJECTORS PNK PNK PNK PNK WIRE FUEL PUMP RELAY FUEL PUMP/ ENGINE OIL PRESSURE SWITCH FUSIBLE LINK A FUSIBLE LINK B FWD LPS FUSE #41 INT DIM FUSE #42 GENERATOR GRY/BLK WIRE HEAD HEAD PARK HEADLAMP AUTO CONTROL MODULE OR DAYTIME RUNNING LAMPS CONTROL MODULE HEADLAMP SWITCH INSTRUMENT CLUSTER HEATER- A/C CONTROL HEADLAMP AND INSTRUMENT PANEL LAMP RADIO HORN RELAY HORNS FUSE #32 HOT AT ALL TIMES I/P FUSE BLOCK I/P FUSE BLOCK RR T/LPS FUSE #43 NCA WIRE OFF OFF PARK ORG/ WIRE PANEL LAMPS DIMMING MODULE INTERIOR LAMPS DIODE PNK PNK PNK PNK WIRE PNK PNK PNK WIRE PNK PNK WIRE PNK WIRE POWER SOURCE INFORMATION NOT AVAILABLE POWERTRAIN CONTROL MODULE POWERTRAIN CONTROL MODULE IGNITION COIL AUTOMATIC TRANSMISSION PPL PRI FAN FUSE #7 PRIMARY ENGINE COOLING FAN RELAY REAR LAMPS RED WIRE SEC FAN FUSE #8 SECONDARY AIR INJECTION PUMP RELAY SEO SOLENOID TRANS FUSE #5 FUEL INJ FUSE #6 FUEL INJ FUSE #9 TURN SIGNAL SWITCH UNDERHOOD ELECTRICAL CENTER UNDERHOOD LAMP WITH TWILIGHT SENTINEL OR DAYTIME RUNNING LAMPS YEL WIRE

BATTERY BLK WIRE BODY 2 BULB TEST ENABLE GENERATOR HOLD- IN COIL I/P FUSE BLOCK IGNITION SWITCH ACCY LOCK OFF MAXI- FUSE 11 PPL PPL #24 PPL CRANK FUSE PULL- IN COIL RED WIRE RUN WIRE SOLENOID CONTACTS STARTER MOTOR STARTER SOLENOID SUPPLEMENTAL INFLATABLE RESTRAINT THEFT DETERRENT MODULE THEFT DETERRENT RELAY UNDERHOOD ELECTRICAL CENTER YEL WIRE