Buick LaCrosse I (2004-2009) a/c comp relay 38 Wiring diagrams

A/C CLU DIODE A/C CLUTCH FUSE 13 A/C COMP RELAY 38 A/C COMPRESSOR CLUTCH SOLENOID A/C COMPRESSOR TEMPERATURE SWITCH A/C REQUEST IND A/C REQUEST SWITCH AIR TEMP A AIR TEMP B AIR TEMP A AIR TEMP B AUTO OFF BLOWER MOTOR SW BATTERY IGN 1 VOLT CLASS 2 SERIAL BLK WIRE BLK/WHT WIRE BRN WIRE COMPUTER DATA LINES SYSTEM 8 1450 734 720 INTERIOR LIGHTS SYSTEM DEFOGGER IND DK BLU WIRE DK BLU/WHT WIRE DK GRN WIRE DK GRN/WHT WIRE FAN 1 FUSE 29 FAN 1 RELAY 42 FAN 2 FUSE 32 FAN 2 RELAY 46 FAN 3 RELAY 43 GROUND GRY WIRE GRY/BLK WIRE HIGH LOW HOT AT ALL TIMES HOT IN RUN OR START HVAC CONTROL MODULE (CENTER OF DASH) ILLUM LOGIC LOWER LEFT AIR TEMPERATURE SENSOR (BEHIND HVAC CONTROL MODULE) LOWER RIGHT AIR TEMPERATURE SENSOR (BEHIND HVAC CONTROL MODULE) LT BLU WIRE LT BLU/BLK WIRE LT GRN WIRE LT GRN/BLK WIRE MODE ACTUATOR (LOWER LEFT SIDE OF HVAC ASSEMBLY) MODE DOOR A MODE DOOR B MODE SWITCH NCA WIRE ORG/ WIRE ORG/BLK WIRE PNK WIRE PNK/WHT WIRE PPL REAR DEFOGGER SWITCH RECIRATION A RECIRATION B RECIRCULATION ACTUATOR (NEAR RIGHT "A" PILLAR, ON UPPER HVAC CASE) RECIRCULATION IND RECIRCULATION SWITCH SENSOR SIG SENSOR SIG LOW REF SENSOR SIG LOW REF SENSOR SIG LOW REF SENSOR SIG LOW REF SENSOR SIG SENSOR SIG LOW REF PPL SPEED CTRL TAN WIRE TAN/BLK WIRE TAN/WHT WIRE TEMPERATURE CONTROL SW UNDERHOOD FUSE BLOCK (MOUNTED TO RIGHT STRUT TOWER) WHT WIRE WHT/BLK WIRE YEL WIRE

9 39 25 48 49 A/C PRESS SIGNAL A/C CLU DIODE A/C CLUTCH FUSE 13 A/C COMP RELAY 38 A/C COMPRESSOR CLUTCH SOLENOID A/C COMPRESSOR TEMPERATURE SWITCH A/C REFRIGERANT PRESSURE SENSOR (ON LEFT SIDE OF ENGINE COMPT, ON ACCUMULATOR) A/C REQUEST IND A/C REQUEST SWITCH BATTERY IGN 1 VOLT CLASS 2 SERIAL BLK WIRE BLK/WHT WIRE COMPUTER DATA LINES SYSTEM DISPLAY FUSE 18 DK GRN WIRE DK GRN/WHT WIRE ENGINE CONTROL MODULE (ECM) (TOP OF ENGINE) ENGINE CONTROLS SYSTEM GROUND GRY WIRE HOT AT ALL TIMES HOT IN RUN OR START HVAC CONTROL MODULE (CENTER OF DASH) HVAC FUSE I/P FUSE BLOCK (BEHIND RIGHT SIDE OF DASH) LOGIC LOW REF CLASS 2 SERIAL A/C COMP CLUTCH NCA WIRE ORG/ WIRE PNK WIRE RED/BLK WIRE UNDERHOOD FUSE BLOCK (MOUNTED TO RIGHT STRUT TOWER) WHT WIRE

12 13 14 15 16 PPL 8 1450 734 720 INTERIOR LIGHTS SYSTEM A/C CLU DIODE A/C CLUTCH FUSE 13 A/C COMP RELAY 38 AUTO OFF BLOWER MOTOR SW BATTERY IGN 1 VOLT CLASS 2 SERIAL BLK WIRE BLK/WHT WIRE BRN WIRE COMPUTER DATA LINES SYSTEM DEFOGGER IND DK BLU WIRE DK BLU/WHT WIRE DK GRN WIRE DK GRN/WHT WIRE FAN 1 FUSE 29 FAN 1 RELAY 42 FAN 2 FUSE 32 FAN 2 RELAY 46 FAN 3 RELAY 43 GROUND GRY WIRE GRY/BLK WIRE HIGH LOW HOT AT ALL TIMES HOT IN RUN OR START HVAC CONTROL MODULE (CENTER OF DASH) ILLUM LOGIC LOWER LEFT AIR TEMPERATURE SENSOR (BEHIND HVAC CONTROL MODULE) LOWER RIGHT AIR TEMPERATURE SENSOR (BEHIND HVAC CONTROL MODULE) LT BLU WIRE LT BLU/BLK WIRE LT GRN WIRE LT GRN/BLK WIRE MODE ACTUATOR (LOWER LEFT SIDE OF HVAC ASSEMBLY) MODE SWITCH ORG/ WIRE ORG/BLK WIRE PNK WIRE PNK/WHT WIRE REAR DEFOGGER SWITCH RECIRCULATION ACTUATOR (NEAR RIGHT "A" PILLAR, ON UPPER HVAC CASE) RECIRCULATION IND RECIRCULATION SWITCH REQUEST SWITCH A/C A/C REQUEST IND SENSOR SIG SENSOR SIG LOW REF SENSOR SIG LOW REF SENSOR SIG LOW REF SENSOR SIG LOW REF SENSOR SIG SENSOR SIG LOW REF PPL SPEED CTRL TAN WIRE TAN/BLK WIRE TAN/WHT WIRE TEMPERATURE CONTROL SW UNDERHOOD FUSE BLOCK (MOUNTED TO RIGHT STRUT TOWER) WHT WIRE WHT/BLK WIRE YEL WIRE

1-2 SHIFT SOLENOID VALVE 12 VOLT REFERENCE IGNITION 3 VOLTAGE 2-3 SHIFT SOLENOID VALVE 3.6L 3.6L 3.8L 3.8L A/C CLUTCH FUSE 13 A/C COMP RELAY 38 ABS FUSE 23 AUTOMATIC A/C PNK PNK WIRE AUTOMATIC TRANSMISSION AUX PWR FUSE 10 AUXILIARY POWER OUTLET BLK WIRE BLK/WHT WIRE BODY CONTROL MODULE BODY CONTROL MODULE (BCM) BRN WIRE CIGAR LIGHTER CRANK RELAY 48 CRANK VOLTAGE CRUISE FUSE ENGINE CONTROL MODULE (ECM) ENGINE POWERTRAIN CONTROL CONTROL MODULE MODULE (ECM) (PCM) FROM IGN 1 RELAY (DIAGRAM 2 OF 4) FROM WASHER/RVC FUSE 6 (DIAGRAM 1 OF 4) HVAC CONTROL MODULE AUTOMATIC A/C MANUAL A/C I/P FUSE BLOCK (BEHIND RIGHT SIDE OF DASH) IGN 1 RELAY 37 IGNITION 1 VOLTAGE IGNITION SWITCH INFLATABLE ELECTRONIC RESTRAINT COMPASS SENSING, MODULE DIAGNOSTIC MODULE INFLATABLE RESTRAINT PASSENGER AIR BAG ON/OFF INDICATOR INFLATABLE RESTRAINT STEERING WHEEL MODULE COIL INSIDE AIR TEMPERATURE SENSOR KEY IN IGNITION SWITCH SIGNAL KEY-IN IGNITION SWITCH LOCK LT GRN WIRE NCA WIRE ORG/ WIRE P/TRAIN RELAY 40 PCM FUSE 15 PNK PNK PNK W/ PARK ASSIST WIRE PNK PNK WIRE PNK WIRE POWERTRAIN CONTROL MODULE (PCM) RED WIRE RUN WIRE SIR FUSE 9 DISPLAY FUSE 18 STEERING ANGLE SENSOR (W/ ABS) TCM FUSE 8 TO A/C CLUTCH FUSE (DIAGRAM 2 OF 4) TO ETC FUSE 17 (DIAGRAM 3 OF 4) TO FAN 2 FUSE (DIAGRAM 3 OF 4) TORQUE CONVERTER POWERTRAIN CLUTCH CONTROL (TCC) MODULE SOLENOID (PCM) VALVE TRANS SOL FUSE 21 TRANSMISSION CONTROL MODULE (TCM) TRANSMISSION CONTROL MODULE (TCM) (3.6L) UNDERHOOD FUSE BLOCK (MOUNTED TO RIGHT STRUT TOWER) WHT WIRE YEL WIRE