GMC Rally G3500 (1985-1996) heater and a/c controller Wiring diagrams

A/C BI-LEV A/C COMPRESSOR CLUTCH COIL A/C COMPRESSOR CLUTCH RELAY (IN UNDERHOOD FUSE/RELAY CENTER) A/C COMPRESSOR HIGH PRESSURE CUTOFF SWITCH (REAR OF A/C COMPRESSOR) A/C COMPRESSOR LOW PRESSURE CUTOFF SWITCH (IN REFRIGERANT LINE) AUXILIARY BLOWER MOTOR AUXILIARY BLOWER MOTOR RESISTOR (LEFT REAR OF CABIN, BEHIND REAR WHEELHOUSE) BLK WIRE BLOWER MOTOR BLOWER MOTOR RESISTOR/RELAY (AT HVAC CONTROL PANEL) BRN WIRE COMPT AT LEFT FENDER) POWERTRAIN CONTROL MODULE (BEHIND (DIESEL) CENTER OF I/P) CONVENIENCE CENTER DIODE (IN UNDERHOOD FUSE/RELAY CENTER) DK BLU WIRE DK GRN WIRE DK GRN/WHT WIRE EXCEPT 7.4L PNK WIRE FUSE 12 FUSE 24 GASOLINE GASOLINE DIESEL GRN WIRE GRY WIRE HEATER AND A/C CONTROLLER HOT AT ALL TIMES HOT AT ALL TIMES HOT IN RUN OR START HOT IN RUN HOT IN RUN OR START HVAC FUSE I/P FUSE BLOCK LT BLU WIRE LT GRN WIRE OFF LO MED HI OFF MAX ORG/ WIRE PNK PNK 7.4L UNDER- HOOD FUSE/ RELAY CENTER WIRE PNK WIRE PPL REAR AUXILIARY HVAC CONTROL MODULE RED WIRE TAN WIRE TEMP UNDER- HOOD FUSE/ RELAY CENTER A/C FUSE IGN E FUSE UNDERHOOD FUSE/RELAY CENTER RR HVAC FUSE VEHICLE CONTROL MODULE (IN ENGINE VENT HEAT BLEND DEF VENT HEAT BLEND DEF OFF MAX A/C BI-LEV VENT MODE WHT WIRE YEL WIRE

A/C BI-LEV A/C COMPRESSOR CLUTCH COIL A/C COMPRESSOR CLUTCH RELAY (IN UNDERHOOD FUSE/RELAY CENTER) A/C COMPRESSOR HIGH PRESSURE CUTOFF SWITCH (REAR OF A/C COMPRESSOR) A/C COMPRESSOR LOW PRESSURE CUTOFF SWITCH (IN REFRIGERANT LINE) AUXILIARY BLOWER MOTOR AUXILIARY BLOWER MOTOR RESISTOR (LEFT REAR OF CABIN, BEHIND REAR WHEELHOUSE) BLK WIRE BLOWER MOTOR BLOWER MOTOR RESISTOR/RELAY (AT HVAC CONTROL PANEL) BRN WIRE COMPT AT LEFT FENDER) POWERTRAIN CONTROL MODULE (BEHIND (DIESEL) CENTER OF I/P) CONVENIENCE CENTER DIODE (IN UNDERHOOD FUSE/RELAY CENTER) DK BLU WIRE DK GRN WIRE DK GRN/WHT WIRE EXCEPT 7.4L PNK WIRE FRONT AUXILIARY HVAC CONTROL MODULE FUSE 12 FUSE 24 GASOLINE GASOLINE DIESEL GRN WIRE GRY WIRE HEATER AND A/C CONTROL LOGIC MODULE (FRONT INTERIOR ROOF PANEL) HEATER AND A/C CONTROLLER HOT AT ALL TIMES HOT AT ALL TIMES HOT IN RUN OR START HOT IN RUN HOT IN RUN OR START HVAC FUSE I/P FUSE BLOCK LT BLU WIRE LT GRN WIRE OFF LO MED HI OFF MAX ORG/ WIRE PNK PNK 7.4L UNDER- HOOD FUSE/ RELAY CENTER WIRE PNK WIRE PPL REAR AUXILIARY HVAC CONTROL MODULE RED WIRE RR CTRL OFF LO MED HI TAN WIRE TEMP UNDER- HOOD FUSE/ RELAY CENTER A/C FUSE IGN E FUSE UNDERHOOD FUSE/RELAY CENTER RR HVAC FUSE VEHICLE CONTROL MODULE (IN ENGINE VENT HEAT BLEND DEF VENT HEAT BLEND DEF OFF MAX A/C BI-LEV VENT MODE WHT WIRE YEL WIRE

AUXILIARY BATTERY (6.5L VIN F) AUXILIARY ENGINE COOLING FAN MOTOR (7.4L VIN J) AUXILIARY POWER OUTLET BATTERY BLK WIRE BLK/WHT WIRE CIGARETTE LIGHTER ASHTRAY LAMP CONVENIENCE CENTER CONVENIENCE CENTER (LEFT SIDE OF I/P) DATA LINK CONNECTOR DAYTIME RUNNING LAMP CONTROL MODULE DAYTIME RUNNING LAMPS RELAY FROM LEFT FRONT POWER DOOR LOCK SWITCH FROM RIGHT FRONT POWER SIDE WINDOW SWITCH HEADLAMP SWITCH HEATER AND A/C CONTROLLER I/P COMPARTMENT LAMP I/P RELAY CENTER IGNITION SWITCH ILLUMINATED ENTRY MODULE INSTRUMENT CLUSTER LEFT FRONT PARK AND TURN SIGNAL LAMP (INNER) (W/ COMPOSITE HEADLAMPS) LEFT FRONT PARK AND TURN SIGNAL LAMP (OUTER) (W/ COMPOSITE HEADLAMPS) LEFT FRONT PARK AND TURN SIGNAL LAMP (W/ SEALED BEAM HEADLAMPS) LEFT FRONT SIDE MARKER LAMP LEFT HEADLAMP (W/ SEALED BEAM HEADLAMPS) LEFT HIGH BEAM HEADLAMP (W/ COMPOSITE HEADLAMPS) LEFT LOW BEAM HEADLAMP (W/ COMPOSITE HEADLAMPS) LEFT POWER SEAT SWITCH UPFITTER PROVISIONS RELAY LEFT SUN SHADE MIRROR LAMP LOW ENGINE COOLANT LEVEL INDICATOR MODULE (6.5L VIN F) LOW ENGINE COOLANT LEVEL INDICATOR SENSOR (6.5L VIN F, 7.4L VIN J) MULTI-FUNCTION ALARM MODULE NCA WIRE OF ENGINE COMPT) POWER ANTENNA ASSEMBLY POWER DOOR LOCK CONTROL MODULE POWER DOOR LOCK RELAY PROVISIONS) (RIGHT KICK PANEL) RADIO REMOTE CONTROL DOOR LOCK RECEIVER RIGHT FRONT RIGHT FRONT PARK AND TURN SIGNAL LAMP (INNER) (W/ COMPOSITE HEADLAMPS) RIGHT FRONT PARK AND TURN SIGNAL LAMP (OUTER) (W/ COMPOSITE HEADLAMPS) RIGHT FRONT PARK AND TURN SIGNAL LAMP (W/ SEALED BEAM HEADLAMPS) RIGHT FRONT SIDE MARKER LAMP RIGHT HEADLAMP (W/ SEALED BEAM HEADLAMPS) RIGHT HIGH BEAM HEADLAMP (W/ COMPOSITE HEADLAMPS) RIGHT LOW BEAM HEADLAMP (W/ COMPOSITE HEADLAMPS) SEAT BELT SWITCH SIDE DOOR JAMB SWITCH (W/ UPFITTER PROVISIONS) STEERING COLUMN GROUND A/T SHIFT LOCK SOLENOID TEMPERATURE VALVE ACTUATOR MOTOR W/ UPFITTER PROVISIONS WINDSHIELD WASHER PUMP MOTOR WINDSHIELD WIPER MOTOR

1995 VFTC AUXILIARY BLOWER MOTOR SWITCH AUXILIARY HEAT BLK WIRE CARGO CONVENIENCE CENTER (LEFT SIDE OF I/P) DK GRN WIRE FRONT AUXILIARY HVAC CONTROL MODULE GROUP GRY WIRE HEATER AND A/C CONTROLLER HOT AT ALL TIMES RADIO B FUSE 19 HOT AT ALL TIMES UNDERHOOD FUSE-RELAY CENTER HORN MINI FUSE I/P FUSE BLOCK ILLUM FUSE 14 INSTRUMENT CLUSTER MULTI-FUNCTION ALARM MODULE NON- BASE ODOMETER ORG/ WIRE PASSENGER PPL PPL/WHT WIRE PRNDL RADIO REAR AUXILIARY HVAC CONTROL MODULE REMOTE CD PLAYER DIM UNDER- HOOD LAMP UNDER- HOOD REEL LAMP WHT WIRE

ABS MAXI- FUSE AUX-A MAXI- FUSE AUX-B MAXI- FUSE HVAC MAXI- FUSE AUXILIARY BATTERY AUXILIARY BLOWER MOTOR HIGH SPEED RELAY AUXILIARY BLOWER MOTOR LOW SPEED RELAY AUXILIARY BLOWER MOTOR LOW SPEED RELAY AUXILIARY BLOWER MOTOR MEDIUM SPEED RELAY AUXILIARY BLOWER MOTOR MEDIUM SPEED RELAY BATTERY BATTERY JUNCTION BLOCK BLK WIRE BLOWER MOTOR BRAKE FUSE 18 BRN WIRE CONVENIENCE CENTER CRUISE CONTROL MODULE (GASOLINE) CRUISE CONTROL SWITCH CRUISE FUSE 6 DIESEL FUSIBLE LINK (10 GA-RUST) GASOLINE GENERATOR GLOW PLUG CONTROLLER HEATER AND A/C CONTROL LOGIC MODULE HEATER AND A/C CONTROLLER HTR A/C FUSE 12 I/P FUSE BLOCK IGN A MAXI FUSE IGN B MAXI FUSE IGNITION SWITCH INLINE FUSE LEFT POWER SIDE WINDOW SWITCH RIGHT POWER SIDE WINDOW SWITCH LOCK LOCK ELECTRONIC BRAKE CONTROL MODULE LOCK OFF LOCK OFF OFF NCA WIRE OFF ORG/ WIRE P/B BOOSTER FLUID FLOW ALARM PARK/ NEUTRAL POSITION SWITCH PNK WIRE PWR WDO CB B WIPER FUSE 12 RADIO RADIO 1 FUSE 17 REAR AUXILIARY HVAC CONTROL MODULE FRONT AUXILIARY HVAC CONTROL MODULE REAR AUXILIARY TEMPERATURE VALVE ASSEMBLY RED WIRE RESISTOR WINDSHIELD WASHER/ WIPER SWITCH FROM FUSE ABOVE RR BLOWER MINI FUSE RR HVAC FUSE 24 RUN WIRE STARTER RELAY STARTER SOLENOID TCC/ STOPLAMP SWITCH ELECTRONIC BRAKE CONTROL MODULE TO I/P FUSE BLOCK TO UNDERHOOD FUSE-RELAY CENTER TO UPFITTER PROVISION RELAY BELOW TRAILER WIRING PROVISION UNDERHOOD FUSE-RELAY CENTER UPFITTER PROVISION CONNECTOR UPFITTER PROVISION RELAY (BEHIND LEFT B PILLAR) VEHICLE CONTROL MODULE (GASOLINE) TEMPERATURE VALVE ACTUATOR MOTOR W/ UPFITTER PROVISIONS WARNING WHT WIRE WINDSHIELD WIPER MOTOR CONVENIENCE CENTER YEL WIRE