GMC Terrain II facelift (2021-2024) Manual a/c circuit

A/C COMPRESSOR A/C COMPRESSOR CLUTCH A/C COMPRESSOR SOLENOID VALVE BATTERY FUSE BLOCK BATTERY POSITIVE VOLT BLK WIRE BLK/GRN WIRE BLOWER MOTOR BLOWER MTR SPD CTRL BLU/BRN WIRE BLU/GRY WIRE BLU/WHT WIRE BLU/YEL WIRE BRN/GRN WIRE BRN/VIO WIRE COMPUTER DATA LINES SYSTEM DEFOGGER SYSTEM DRIVER INFORMATION CENTER DISPLAY DRV SOLAR SENS SIG ENGINE COOLANT TEMPERATURE GAUGE ENGINE COOLANT TEMPERATURE IND GRN WIRE GRN/YEL WIRE GRY WIRE GRY/BRN WIRE GRY/GRN WIRE HOT AT ALL TIMES HOT W/ BATTERY SAVER RELAY 1 ENERGIZED HOT W/ IGNITION MAIN RELAY ENERGIZED HVAC CONTROL MODULE (TOP CENTER OF DASH) INSIDE AIR TEMP SENS SIG INSTRUMENT CLUSTER INSTRUMENT PANEL FUSE BLOCK LIN BUS 1 LOGIC LOW SPEED GMLAN SERIAL DATA POWER DISTRIBUTION SYSTEM POWER SUPPLY TRANSFORMER (W/ START/STOP SYSTEM) (LOWER CENTER OF DASH) REAR DEFOG RLY CTRL RED/BLU WIRE RED/GRN WIRE RED/GRY WIRE RUN/CRANK IGNITION 1 VOLT SOLAR SENS LOW REF SOLENOID VALVE CTRL UNDERHOOD FUSE BLOCK VIO/GRN WIRE W/ START/STOP SYSTEM W/O START/STOP SYSTEM

A/C COMPRESSOR CLUTCH RELAY A/C REFRIGERANT PRESSURE SENSOR A/C SWITCH BATTERY FUSE BLOCK BLK WIRE BLK/GRN WIRE BLU/WHT WIRE BRN/GRN WIRE BRN/RED WIRE DEFROST, LOWER AIR OUTLET IND DEFROST, LOWER AIR OUTLET SWITCH ENGINE CONTROLS IGNITION RELAY FAN DOWN SWITCH FAN UP SWITCH GRN WIRE GRN/YEL WIRE GRY WIRE HOT AT ALL TIMES HVAC CONTROLS LEFT TEMPERATURE UP SWITCH START/ STOP SWITCH RIGHT TEMPERATURE DOWN SWITCH LOGIC LOWER AIR OUTLET IND LOWER AIR OUTLET SWITCH MAX WINDSHIELD DEFROST IND MAX WINDSHIELD DEFROST SWITCH RECIRCULATION IND RECIRCULATION SWITCH RED WIRE RED/BLU WIRE RIGHT TEMPERATURE UP SWITCH UNDERHOOD FUSE BLOCK UPPER AIR OUTLET IND UPPER AIR OUTLET SWITCH UPPER, LOWER AIR OUTLET IND UPPER, LOWER AIR OUTLET SWITCH VIO/BLU WIRE WHT/GRY WIRE WINDSHIELD DEFROST IND WINDSHIELD DEFROST SWITCH WINDSHIELD DEFROST SWITCH LEFT TEMPERATURE DOWN SWITCH

5 VOLT REF A/C COMPRESSOR A/C PRESS AMBIENT AIR AMBIENT LIGHT/SUNLOAD SENSOR (TOP CENTER OF DASH) ANTI-THEFT SYSTEM BATT POS VOLT BLK WIRE BLK/GRN WIRE BLK/GRY WIRE BLK/WHT WIRE BLU WIRE BLU/BLK WIRE BLU/GRY WIRE BLU/WHT WIRE BRN/RED WIRE COMPUTER DATA LINES SYSTEM COOLING FAN MOTOR (MOUNTED TO COOLING FAN SHROUD) DATA (-) (3) ENG COOLANT FUSED SPLY VOLT 1 GMLAN SERIAL GRN WIRE GRN/VIO WIRE GRY WIRE HEADLIGHTS SYSTEM LOGIC LOW REF 2 MAIN RLY NCA WIRE RED/BLU WIRE RED/WHT WIRE SENS LO REF 1 SENS SIG TEMP SENS SIG TEMP SENS SIGNAL UNDERHOOD FUSE BLOCK VIO/BLU WIRE WHT WIRE WHT/BLU WIRE WHT/GRY WIRE

A/C EVAPORATOR TEMPERATURE SENSOR AIR INLET DR STEPPER MOTOR CTRL 1 AIR INLET DR STEPPER MOTOR CTRL 2 AIR INLET DR STEPPER MOTOR CTRL 3 AIR INLET DR STEPPER MOTOR CTRL 4 AIR RECIRCULATION DOOR ACTUATOR AIR TEMPERATURE DOOR ACTUATOR AMBIENT AIR TEMPERATURE SENSOR BLK WIRE BLK/GRN WIRE BLK/GRY WIRE BLU WIRE BLU/GRY WIRE BLU/WHT WIRE BRN/GRN WIRE DR CTRL LOW REF ENGINE CONTROLS SYSTEM ENGINE COOLANT TEMPERATURE SENSOR EVAP CORE TEMP SENS SIG GRN WIRE GRN/WHT WIRE GRY WIRE GRY/BRN WIRE GRY/RED WIRE HOT AT ALL TIMES HVAC CONTROL MODULE (TOP CENTER OF DASH) HVAC MOTOR CTRL LOGIC MODE DOOR ACTUATOR MODE DR STEPPER MOTOR CTRL 1 MODE DR STEPPER MOTOR CTRL 2 MODE DR STEPPER MOTOR CTRL 3 MODE DR STEPPER MOTOR CTRL 4 ORG/ WIRE RED/BLK WIRE RED/GRN WIRE RED/WHT WIRE TEMP DR STEPPER MOTOR CTRL 1 TEMP DR STEPPER MOTOR CTRL 2 TEMP DR STEPPER MOTOR CTRL 3 TEMP DR STEPPER MOTOR CTRL 4 UNDERHOOD FUSE BLOCK WHT/PNK WIRE WHT/RED WIRE YEL WIRE