Chevrolet Chevy Express G2500 (1996-2012) hot at all times Wiring diagrams

ABS FUSE ABS IND. BATTERY SIGNAL GROUND BLK WIRE BLK/WHT WIRE BRAKE FUSE 18 BRAKE IND BRAKE PRESSURE DIFFERENTIAL SWITCH (ON LEFT FRAME RAIL, NEAR CENTER OF VEHICLE) BRN WIRE COMPUTER DATA LINES SYSTEM DATA LINK CONNECTOR (DLC) (UNDER LEFT SIDE OF DASH) DK GRN WIRE GAUGES FUSE 4 HOT AT ALL TIMES HOT IN RUN HOT IN RUN OR START I/P FUSE BLOCK (ON LEFT LOWER KICK PANEL) IGNITION ABS IND GROUND BRAKE SW INPUT INSTRUMENT CLUSTER LEFT FRONT WHEEL SPEED SENSOR LT BLU WIRE LT GRN WIRE LT GRN/BLK WIRE PNK WIRE POWERTRAIN CONTROL MODULE (PCM) (IN ENGINE COMPT, ON LEFT INNER FENDER) PPL PPL PPL 1807 680 PPL/WHT WIRE RED WIRE RIGHT FRONT WHEEL SPEED SENSOR SENSOR HIGH SENSOR HIGH SENSOR LOW SENSOR LOW 873 833 TAN WIRE TAN/WHT WIRE TCC/STOPLAMP SWITCH (BEHIND DASH, ON BRAKE PEDAL SUPPORT) UNDERHOOD FUSE/RELAY CENTER UNDERHOOD FUSE/RELAY CENTER (ON LEFT SIDE OF ENGINE COMPT) VEHICLE SPEED SENSOR (VSS) (ON SIDE OF TRANSMISSION) VSS VSS SIG VSS SIG DIAGNOSTIC SIG SERIAL DATA BRAKE IND INPUT EBCM GROUND WARNING SYSTEMS YEL WIRE YEL/BLK WIRE

ANTI-LOCK BRAKES SYSTEM AUTO CRUISE BLK/WHT WIRE BRAKE FUSE 18 BRN WIRE CRUISE CONTROL MODULE (FRONT OF ENGINE COMPT NEAR LEFT FENDER) CRUISE CONTROL ON/OFF SWITCH CRUISE FUSE 6 DK BLU WIRE DK GRN/WHT WIRE GRY WIRE GRY/BLK WIRE HOT AT ALL TIMES HOT IN RUN I/P FUSE BLOCK (LEFT LOWER KICK PANEL) INSTRUMENT CLUSTER SYSTEM LT BLU/BLK WIRE LT GRN/BLK WIRE OFF ON PNK WIRE ORG/ WIRE POWERTRAIN CONTROL MODULE (PCM) (LEFT SIDE OF ENGINE COMPT) PPL PPL/WHT WIRE R/A S/C SPEED SIGNAL STOP FUSE 1 TAN/WHT WIRE TCC/BRAKE SWITCH (ON BRAKE PEDAL SUPPORT) VCM SIGNAL SPEED SENSOR INPUT VEHICLE SPEED SENSOR (VSS) (ON SIDE OF TRANSMISSION) VSS HIGH VSS LOW WHT WIRE

ABS FUSE ABS IND. BATTERY SIGNAL GROUND BLK WIRE BLK/WHT WIRE BRAKE FUSE 18 BRAKE IND BRAKE PRESSURE DIFFERENTIAL SWITCH (ON LEFT FRAME RAIL, NEAR CENTER OF VEHICLE) BRN WIRE COMPUTER DATA LINES SYSTEM DATA LINK CONNECTOR (DLC) (UNDER LEFT SIDE OF DASH) DK GRN WIRE GAUGES FUSE 4 HOT AT ALL TIMES HOT IN RUN HOT IN RUN OR START I/P FUSE BLOCK (ON LEFT LOWER KICK PANEL) IGNITION ABS IND GROUND BRAKE SW INPUT INSTRUMENT CLUSTER LEFT FRONT WHEEL SPEED SENSOR LT BLU WIRE LT GRN WIRE LT GRN/BLK WIRE PNK WIRE POWERTRAIN CONTROL MODULE (PCM) (IN ENGINE COMPT, ON LEFT INNER FENDER) PPL PPL PPL 1807 680 PPL/WHT WIRE RED WIRE RIGHT FRONT WHEEL SPEED SENSOR SENSOR HIGH SENSOR HIGH SENSOR LOW SENSOR LOW 873 833 TAN WIRE TAN/WHT WIRE TCC/STOPLAMP SWITCH (BEHIND DASH, ON BRAKE PEDAL SUPPORT) UNDERHOOD FUSE/RELAY CENTER UNDERHOOD FUSE/RELAY CENTER (ON LEFT SIDE OF ENGINE COMPT) VEHICLE SPEED SENSOR (VSS) (ON SIDE OF TRANSMISSION) VSS VSS SIG VSS SIG DIAGNOSTIC SIG SERIAL DATA BRAKE IND INPUT EBCM GROUND WARNING SYSTEMS YEL WIRE YEL/BLK WIRE

ANTI-LOCK BRAKES SYSTEM AUTO CRUISE BLK/WHT WIRE BRAKE FUSE 18 BRN WIRE CRUISE CONTROL MODULE (FRONT OF ENGINE COMPT NEAR LEFT FENDER) CRUISE CONTROL ON/OFF SWITCH CRUISE FUSE 6 DK BLU WIRE DK GRN/WHT WIRE GRY WIRE GRY/BLK WIRE HOT AT ALL TIMES HOT IN RUN I/P FUSE BLOCK (LEFT LOWER KICK PANEL) INSTRUMENT CLUSTER SYSTEM LT BLU/BLK WIRE LT GRN/BLK WIRE OFF ON PNK WIRE ORG/ WIRE POWERTRAIN CONTROL MODULE (PCM) (LEFT SIDE OF ENGINE COMPT) PPL PPL/WHT WIRE R/A S/C SPEED SIGNAL STOP FUSE 1 TAN/WHT WIRE TCC/BRAKE SWITCH (ON BRAKE PEDAL SUPPORT) VCM SIGNAL SPEED SENSOR INPUT VEHICLE SPEED SENSOR (VSS) (ON SIDE OF TRANSMISSION) VSS HIGH VSS LOW WHT WIRE

ABS FUSE ABS IND. BATTERY SIGNAL GROUND BLK WIRE BLK/WHT WIRE BRAKE FUSE 18 BRAKE IND BRAKE PRESSURE DIFFERENTIAL SWITCH (ON LEFT FRAME RAIL, NEAR CENTER OF VEHICLE) BRN WIRE COMPUTER DATA LINES SYSTEM DATA LINK CONNECTOR (DLC) (UNDER LEFT SIDE OF DASH) DK GRN WIRE GAUGES FUSE 4 HOT AT ALL TIMES HOT IN RUN HOT IN RUN OR START I/P FUSE BLOCK (ON LEFT LOWER KICK PANEL) IGNITION ABS IND GROUND BRAKE SW INPUT INSTRUMENT CLUSTER LEFT FRONT WHEEL SPEED SENSOR LT BLU WIRE LT GRN WIRE LT GRN/BLK WIRE PNK WIRE POWERTRAIN CONTROL MODULE (PCM) (IN ENGINE COMPT, ON LEFT INNER FENDER) PPL PPL PPL 1807 680 PPL/WHT WIRE RED WIRE RIGHT FRONT WHEEL SPEED SENSOR SENSOR HIGH SENSOR HIGH SENSOR LOW SENSOR LOW 873 833 TAN WIRE TAN/WHT WIRE TCC/STOPLAMP SWITCH (BEHIND DASH, ON BRAKE PEDAL SUPPORT) UNDERHOOD FUSE/RELAY CENTER UNDERHOOD FUSE/RELAY CENTER (ON LEFT SIDE OF ENGINE COMPT) VEHICLE SPEED SENSOR (VSS) (ON SIDE OF TRANSMISSION) VSS VSS SIG VSS SIG DIAGNOSTIC SIG SERIAL DATA BRAKE IND INPUT EBCM GROUND WARNING SYSTEMS YEL WIRE YEL/BLK WIRE

2 12 PPL DATA LINK CONNECTOR (UNDER LEFT SIDE OF DASH) ABS FUSE ABS IND. BATTERY SIGNAL GROUND BLK WIRE BLK/WHT WIRE BRAKE FUSE 18 BRAKE IND BRAKE PRESSURE DIFFERENTIAL SWITCH (ON LEFT FRAME RAIL, NEAR CENTER OF VEHICLE) BRN WIRE DAYTIME RUNNING LAMP CONTROL MODULE (UNDER LEFT SIDE OF DASH) DK GRN WIRE ELECTRONIC BRAKE CONTROL MODULE (ON LEFT FRAME RAIL NEAR CENTER OF VEHICLE) GAUGES FUSE 4 HOT AT ALL TIMES HOT IN RUN HOT IN RUN OR START I/P FUSE BLOCK (ON LEFT LOWER KICK PANEL) IGNITION ABS IND GROUND BRAKE SW INPUT INSTRUMENT CLUSTER LEFT FRONT WHEEL SPEED SENSOR RIGHT FRONT WHEEL SPEED SENSOR LT BLU WIRE LT GRN WIRE LT GRN/BLK WIRE PASSLOCK MODULE (BELOW CENTER OF DASH) PNK WIRE POWERTRAIN CONTROL MODULE (PCM) (BEHIND CENTER OF DASH) PPL PPL PPL 1807 680 PPL SERIAL DATA PPL/WHT WIRE RED WIRE SENSOR HIGH SENSOR HIGH SENSOR LOW SENSOR LOW 873 833 SERIAL DATA TAN WIRE TAN/WHT WIRE TCC/ STOPLAMP SWITCH (ON BRAKE PEDAL SUPPORT) UNDERHOOD FUSE/RELAY CENTER UNDERHOOD FUSE/RELAY CENTER (LEFT SIDE OF ENGINE COMPT) VEHICLE SPEED SENSOR (LEFT SIDE OF TRANSMISSION) VEHICLE SPEED SENSOR BUFFER MODULE (UNDER GLOVE BOX) VSS VSS SIG VSS SIG DIAGNOSTIC SIG SERIAL DATA BRAKE IND INPUT EBCM GROUND WARNING SYSTEMS YEL WIRE YEL/BLK WIRE

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

3 2 PPL 5.0L, 5.7L GAS 4.3L, 8.1L GAS 6.5L DIESEL 8.1L ABS SERIAL DATA BLK WIRE BLK/WHT WIRE CONVENIENCE CENTER (UNDER LEFT SIDE OF DASH) DATA LINK CONNECTOR (DLC) (UNDER LEFT SIDE OF DASH) HOT AT ALL TIMES I/P FUSE BLOCK INFLATABLE RESTRAINT SENSING, DIAGNOSTIC MODULE (UNDER LEFT FRONT SEAT) ORG/ WIRE PASSLOCK MODULE (BELOW CENTER OF DASH) POWERTRAIN CONTROL MODULE (PCM) (BEHIND CENTER OF DASH) PPL PPL 4.3L, 6.5L DIESEL ONLY PPL 5.0L, 5.7L GAS ONLY PPL SERIAL DATA PROG SIGNAL PWR AUX FUSE 7 RADIO REMOTE CONTROL DOOR LOCK RECEIVER (RCDLR) (BEHIND CENTER OF DASH) SERIAL DATA TAN/WHT WIRE

2501 2500 2501 2500 COMPUTER DATA LINES SYSTEM AIR TEMPERATURE ACTUATOR (BEHIND RIGHT SIDE OF DASH, ON HVAC) AUXILIARY BLOWER MOTOR (IF EQUIPPED) AUXILIARY BLOWER MOTOR LOW SPEED RELAY (IF EQUIPPED) (LEFT REAR OF PASSENGER AUXILIARY BLOWER MOTOR MEDIUM SPEED RELAY AUXILIARY BLOWER MOTOR RESISTOR ASSEMBLY (IF EQUIPPED) AUXILIARY BLOWER MOTOR SWITCH (IF EQUIPPED) BLK WIRE BLOWER MOTOR (ON RIGHT REAR OF ENGINE COMPT, ON EVAPORATOR CASE) BODY CONTROL MODULE (BCM) (BEHIND LOWER RIGHT SIDE OF DASH) BODY FUSE BLOCK (UNDER LEFT FRONT SEAT) BREAKOUT) BRN WIRE BRN/WHT WIRE COMPT, ATTACHED TO AUXILIARY HVAC MODULE) CONNECTOR BREAKOUT) COOLANT HEATER BLOWER MOTOR GND COOLANT HEATER COMBUSTION SENSOR LOW REF COOLANT HEATER CONTROL MODULE COOLANT HEATER GLOW PLUG VOLT DK BLU WIRE DK BLU/LT GRN WIRE FOH MDL (D) FUSE 35 FROM AUXILIARY BLOWER MOTOR BREAKOUT) GND SERIAL - SERIAL + SERIAL - SERIAL + GRN/RED WIRE HOT AT ALL TIMES HOT W/ RUN/ HVAC 1 FUSE 14 HVAC 2 FUSE 13 HVAC CONTROL ASSEMBLY LOGIC 8 10 7 LT BLU WIRE MAX A/C OFF A/C BI-LEV MED LO OFF OF ENGINE BLOCK) ORG/ WIRE REAR BLWR FUSE 29 RED WIRE RED/BLK WIRE RED/WHT WIRE REF SER DATA TAN WIRE TAN/BLK WIRE VACUUM PUMP (6.6L) (RIGHT FRONT OF ENGINE COMPT, UNDER BATTERY) VENT FLOOR MIX-BLEND DEF VOLT W/ AUXILIARY FUEL FIRED HEATER W/O AUXILIARY FUEL FIRED HEATER WHT WIRE YEL WIRE