Oldsmobile Alero I (1999-2004) powertrain control module (pcm) (below left side of dash) a/c press sig low ref Wiring diagrams

5 VOLT REF A/C A/C BFC FUSE 37 A/C COMPRESSOR CLUTCH A/C COMPRESSOR CLUTCH DIODE A/C COMPRESSOR CLUTCH RELAY A/C ON A/C REFRIGERANT PRESSURE SENSOR (FRONT OF ENG COMPT) A/C REQUEST A/C REQUEST OUTPUT REAR DEFOG AIR TEMPERATURE ACTUATOR (RIGHT SIDE OF HVAC ASSEMBLY) BATTERY VOLTAGE BI- LVL HEAT BLK WIRE BLK/WHT WIRE BLOWER HVAC RELAY BLOWER MOTOR BLOWER MOTOR RESISTOR ASSEMBLY (BELOW RIGHT SIDE OF DASH) BLOWER SWITCH BODY CONTROL MODULE (BCM) (BEHIND RIGHT SIDE OF DASH) A/C REQUEST INPUT BRN WIRE COMPUTER DATA LINES SYSTEM COOL FAN 1 FUSE 8 COOL FAN 1 RELAY COOL FAN 2 FUSE 52 COOL FAN MODE RELAY COOL FAN 2 RELAY COOLING FAN (LEFT) COOLING FAN (RIGHT) DEF HEAT/ DEF DEF ON DEFOGGER SYSTEM DK BLU WIRE DK GRN WIRE DK GRN/WHT WIRE DOOR CTRL INPUT ECT SENSOR HIGH SPEED FAN CONTROL ENGINE COOLANT TEMPERATURE (ECT) SENSOR (RIGHT REAR OF ENGINE) GROUND GRY WIRE HEATER COMMAND OUTPUT HI BLO MOT FUSE 53 HIGH OFF LOW HOT AT ALL TIMES HOT IN RUN HOT IN RUN, START HTR-A/C FUSE 46 HVAC BLOWER FUSE D HVAC CONTROL ASSEMBLY IGN IGN 3 VOLTAGE MODE REQUEST ILLUM IPC/HVAC BATT FUSE L LH I/P FUSE BLOCK (BEHIND LEFT SIDE OF DASH) LOW REF LOW SPEED FAN CONTROL LT BLU WIRE LT GRN WIRE MAX VENT MODE SWITCH ORG/ WIRE OSA OSA ON REC ON OSA REQUEST REC REQUEST PARK LAMP SUPPLY A/C DISABLE POWERTRAIN CONTROL MODULE (PCM) (BELOW LEFT SIDE OF DASH) A/C PRESS SIG LOW REF PPL REC RED/BLK WIRE RH I/P FUSE BLOCK (BEHIND RIGHT SIDE OF DASH) SERIAL DATA CLASS 2 SERIAL DATA CLASS 2 LH I/P FUSE BLOCK (BEHIND LEFT SIDE OF DASH) SPLICE PACK SPLICE PACK SPLICE PACK TAN WIRE UNDERHOOD FUSE BLOCK (IN LEFT SIDE OF ENGINE COMPARTMENT, ON STRUT TOWER) UNDERHOOD FUSE BLOCK (LEFT SIDE OF ENGINE COMPT, ON STRUT TOWER) WHT WIRE YEL WIRE

5 VOLT REF A/C A/C BFC FUSE 37 A/C COMPRESSOR CLUTCH A/C COMPRESSOR CLUTCH DIODE A/C COMPRESSOR CLUTCH RELAY A/C ON A/C REFRIGERANT PRESSURE SENSOR (FRONT OF ENG COMPT) A/C REQUEST A/C REQUEST OUTPUT REAR DEFOG AIR TEMPERATURE ACTUATOR (RIGHT SIDE OF HVAC ASSEMBLY) BATTERY VOLTAGE BI- LVL HEAT BLK WIRE BLK/WHT WIRE BLOWER HVAC RELAY BLOWER MOTOR BLOWER MOTOR RESISTOR ASSEMBLY (BELOW RIGHT SIDE OF DASH) BLOWER SWITCH BODY CONTROL MODULE (BCM) (BEHIND RIGHT SIDE OF DASH) A/C REQUEST INPUT BRN WIRE COMPUTER DATA LINES SYSTEM COOL FAN 1 FUSE 8 COOL FAN 1 RELAY COOL FAN 2 FUSE 52 COOL FAN 2 GROUND FUSE 55 COOL FAN MODE RELAY COOL FAN 2 RELAY COOLING FAN (LEFT) COOLING FAN (RIGHT) DEF HEAT/ DEF DEF ON DEFOGGER SYSTEM DK BLU WIRE DK GRN WIRE DK GRN/WHT WIRE DOOR CTRL INPUT ECT SENSOR HIGH SPEED FAN CONTROL ENGINE CONTROLS SYSTEM GROUND GRY WIRE HEATER COMMAND OUTPUT HI BLO MOT FUSE 53 HIGH OFF LOW HOT AT ALL TIMES HOT IN RUN HOT IN RUN, START HTR-A/C FUSE 46 HVAC BLOWER FUSE D HVAC CONTROL ASSEMBLY IGN IGN 3 VOLTAGE MODE REQUEST ILLUM IPC/HVAC BATT FUSE L LH I/P FUSE BLOCK (BEHIND LEFT SIDE OF DASH) LOW REF LOW SPEED FAN CONTROL LT BLU WIRE LT GRN WIRE MAX VENT MODE SWITCH ORG/ WIRE ORG/BLK WIRE OSA OSA ON REC ON OSA REQUEST REC REQUEST PARK LAMP SUPPLY A/C DISABLE POWERTRAIN CONTROL MODULE (PCM) (BELOW LEFT SIDE OF DASH) A/C PRESS SIG LOW REF PPL REC RED/BLK WIRE RH I/P FUSE BLOCK (BEHIND RIGHT SIDE OF DASH) SERIAL DATA CLASS 2 SERIAL DATA CLASS 2 LH I/P FUSE BLOCK (BEHIND LEFT SIDE OF DASH) SPLICE PACK SPLICE PACK SPLICE PACK TAN WIRE UNDERHOOD FUSE BLOCK (IN LEFT SIDE OF ENGINE COMPARTMENT, ON STRUT TOWER) UNDERHOOD FUSE BLOCK (LEFT SIDE OF ENGINE COMPT, ON STRUT TOWER) WHT WIRE YEL WIRE