Dodge Ram Wagon B2500 (1996-2002) near bottom of brake booster) Wiring diagrams

1 2 3 PRESS SW OUTPUT IGNITION A/C SWITCH SENSE A/C COMP RLY CTRL A/C PRESSURE SIG A/C SWITCH SENSE A/C COMPRESSOR A/C COMPRESSOR CLUTCH A/C COMPRESSOR CLUTCH RELAY (IN POWER DISTRIBUTION CENTER) A/C CYCLING SWITCH (IN FRONT EVAPORATOR COIL FINS) A/C HEATER CONTROL A/C HIGH PRESSURE SWITCH (ON DISCHARGE LINE, NEAR A/C CONDENSER) A/C LOW PRESSURE SWITCH (ON SUCTION LINE, NEAR FILTER DRIER) A/C SELECT DEFROST A/C SWITCH SIGNAL AMPLIFIER BLEND AIR DOOR ACTUATOR (UNDER DASH, AT TOP RIGHT END OF DISTRIBUTION DUCT) BLK WIRE BLK/BRN WIRE BLK/VIO WIRE BLOWER MOTOR (IN ENGINE COMPART- MENT IN BLOWER HOUSING) DK BLU WIRE DK BLU/BLK WIRE DK BLU/ORG WIRE DK BLU/RED WIRE DK BLU/WHT WIRE DK GRN WIRE DK GRN/WHT WIRE FAN HIGH FUSE 5 GRN WIRE HIGH BLOWER RELAY (IN ENGINE COMPARTMENT, ON HEATER-A/C HOUSING TOP COVER) HOT AT ALL TIMES HOT AT ALL TIMES POWER DISTRIBUTION CENTER FUSE 4 HOT IN RUN JUNCTION BLOCK FUSE 2 HVAC IGNITION RUN RELAY (IN POWER DISTRIBUTION CENTER) JOINT CONNECTOR NO.1 (LEFT SIDE OF DASH) LOW MED 1 MED 2 LT BLU WIRE LT GRN/GRY WIRE LT GRN/WHT WIRE NEAR BOTTOM OF BRAKE BOOSTER) OFF REC PANEL BI-LEVEL OFF REC PANEL BI-LEVEL FLOOR MODE DE-FOG DEFROST ORG/ WIRE POWERTRAIN CONTROL MODULE (CENTER OF FIREWALL) REAR A/C REAR A/C- HEATER UNIT RED WIRE RED/VIO WIRE RED/YEL WIRE TAN WIRE VIO WIRE VIO/WHT WIRE WHT WIRE YEL WIRE

ALL EXCEPT BASE BLK WIRE BLK/LT BLU WIRE BLK/PNK WIRE BLK/WHT WIRE CENTER DOME LAMP CENTRAL TIMER MODULE (ON LEFT CENTER DASH PANEL SUPPORT) COURTESY LAMP RELAY DOME LAMPS SWITCH DRIVER DOOR AJAR SWITCH EXCEPT BASE FRONT DOME LAMP FRONT DOME/ READING LAMPS FUSE 1 GLOVE BOX LAMP/ SWITCH HEAD PARK HEADLAMP SWITCH HOT AT ALL TIMES IGNITION SWITCH INSTRUMENT CLUSTER (LEFT SIDE OF DASH) INT LAMPS OFF ON LEFT VISOR/ VANITY LAMP LT BLU WIRE MIDLINE ONLY NCA WIRE NEAR BOTTOM OF BRAKE BOOSTER) NEAR LEFT "B" PILLAR) OFF PASSENGER DOOR AJAR SWITCH PNK (LEFT FRONT ROOF RAIL) WIRE PNK VAN WIRE PNK/LT BLU WIRE PNK/WHT WIRE POWER DOOR LOCK MODULE (ON LEFT CENTER DASH PANEL) REAR DOME LAMP REAR DOOR JAMB SWITCH RELAY & FUSE BLOCK RELAY & FUSE BLOCK (ON LEFT END OF DASH) RIGHT VISOR/ VANITY LAMP SIDE DOOR JAMB SWITCH TAN/RED WIRE UNDERHOOD LAMP VAN W/ VAN CONVERSION W/0 VAN CONVERSION WAGON WHT WIRE YEL WIRE

3 1 5 11 RT TURN SW SEN HAZARD FLASH SIG LT TURN SW SEN GROUND PNK WIRE B(+) LEFT TURN SIG LEFT TURN SIG BACK-UP LAMPS CIRCUIT 7 4 3 2 6 5 1 BLK WIRE BLK/ORG WIRE BLK/YEL WIRE BOOSTER BREAKOUT) BRN WIRE BRN/RED WIRE CENTER HIGH MOUNTED STOP LAMP CLASS III COMBINATION FLASHER (ON RELAY & FUSE BLOCK) DK BLU WIRE DK GRN WIRE DK GRN/ORG WIRE ELECTRIC BRAKE PROVISION (LEFT OF STEERING COLUMN) FUSE 2 FUSE 3 FUSE BLOCK FUSE BLOCK FUSE 19 GRN WIRE HEADLAMP SWITCH HOT AT ALL TIMES HOT IN ACC OR RUN IGN PWR LEFT TURN SW SEN INSTRUMENT CLUSTER INSTRUMENT CLUSTER SYSTEM J/C 3 (LEFT SIDE OF DASH) LEFT FRONT PARK/ TURN SIGNAL LAMP LEFT LICENSE LAMP RIGHT LICENSE LAMP LEFT TAIL/ STOP/ TURN SIGNAL LAMP LEFT REAR SIDE MARKER LAMP LEFT TURN IND LICENSE LAMP LT BLU WIRE LT BLU/WHT WIRE LT BLU/YEL WIRE LT GRN WIRE LT GRN/YEL WIRE MULTI- FUNCTION SWITCH NEAR BOTTOM OF BRAKE BOOSTER) OFF HEAD PARK ORG/ WIRE PNK HAZARD FLASH SIG WIRE PNK/DK BLU WIRE PNK/RED WIRE POWER DISTRIBUTION CENTER FUSE 4 RED WIRE RED/TAN WIRE RED/WHT WIRE RED/YEL WIRE RELAY & FUSE BLOCK RELAY & FUSE BLOCK FUSE 4 RIGHT FRONT PARK/ TURN SIGNAL LAMP RIGHT REAR SIDE MARKER LAMP RIGHT TAIL/ STOP/ TURN SIGNAL LAMP RIGHT TURN IND RIGHT TURN SIG RIGHT TURN SIG BRAKE LP SW OUT GROUND RT TURN SW SEN STANDARD STANDARD CLASS III STEP BUMPER STOPLIGHT SWITCH (ON BRAKE PEDAL BRACKET) TAN WIRE TAN/DK BLU WIRE TRAILER TOW CLASS III TRAILER TOW CONNECTOR (CLASS III) TRAILER TOW CONNECTOR (STANDARD) TRAILER TOW FUSE 1 TRAILER TOW FUSE 2 TRAILER TOW RELAY (IN PDC) TRAILER TOW STANDARD VIO/BLK WIRE WHT WIRE WHT/TAN WIRE YEL WIRE

A/C COMPRESSOR CLUTCH A/C HEATER CONTROL AIR BAG CONTROL MODULE BATTERY BATTERY GROUND BLK WIRE BLK/TAN WIRE BRAKE LAMP SWITCH BRAKE WARNING INDICATOR SWITCH CENTRAL TIMER MODULE CONTROLLER ANTI-LOCK BRAKE DATA LINK CONNECTOR (DLC) DAYTIME RUNNING LAMP (DRL) MODULE DK GRN WIRE ENGINE STARTER MOTOR GENERATOR HIGH BLOWER RELAY HIGH NOTE HORN INSTRUMENT CLUSTER RADIO INTERMITTENT WIPE MODULE LEFT FRONT PARK/TURN SIGNAL LAMP LEFT HEADLAMP LOW NOTE HORN LT BLU WIRE NCA WIRE NEAR BOTTOM OF BRAKE BOOSTER) OTHER PNK PNK WIRE PNK WIRE POWER DISTRIBUTION CENTER POWER OUTLET POWERTRAIN CONTROL MODULE (PCM) REAR A/C HEATER CONTROL RIGHT FRONT PARK/TURN SIGNAL LAMP RIGHT HEADLAMP SPEED CONTROL SERVO TAN WIRE TRAILER TOW RELAY UNDERHOOD LAMP VIO WIRE WASHER FLUID LEVEL SWITCH WINDSHIELD WASHER PUMP

BLK WIRE CENTRAL TIMER MODULE (LEFT CENTER OF DASH, NEAR SUPPORT BRACKET) CIRCUIT BREAKER OFF PARK DK BLU WIRE DK BLU/WHT WIRE FUSE 15 FUSE 8 FUSE BLOCK (ON LEFT END OF DASH) GROUND HEAD HEAD- LAMP SWITCH HEADLAMP BEAM SELECT SWITCH HEADLAMP RELAY (IN RELAY & FUSE/BLOCK) HEADLAMP RELAY CTRL HIGH BEAM INDICATOR HIGH BEAM OUTPUT HIGH HIGH LOW LOW HOT AT ALL TIMES HOT IN RUN, START INSTRUMENT CLUSTER J/C 4 (LEFT CENTER OF DASH, SUPPORT) LEFT HEADLAMP LOW BEAM OUTPUT LT GRN WIRE MULTI- FUNCTION SWITCH NCA WIRE NEAR BOTTOM OF BRAKE BOOSTER) ORG/ WIRE OTHER HIGHLINE PARK BRAKE INDICATOR PARK BRAKE SW SENS HIGH BEAM IND DRIVER IGNITION FUSED (B+) PARK BRAKE SWITCH (ON PARKING BRAKE PEDAL BRACKET) PNK WIRE POWER DISTRIBUTION CENTER (IN ENGINE COMPARTMENT, NEXT TO BATTERY) POWER SUPPLY RED WIRE RED/ORG WIRE RED/WHT WIRE RIGHT HEADLAMP VIO WIRE VIO/WHT WIRE WHT WIRE WHT/BLK WIRE WHT/PNK WIRE

BLK WIRE CENTRAL TIMER MODULE (LEFT CENTER OF DASH, NEAR SUPPORT BRACKET) CIRCUIT BREAKER OFF PARK FUSE 15 HEAD HEADLAMP BEAM SELECT SWITCH HEADLAMP RELAY (IN RELAY & FUSE BLOCK) HEADLAMP RELAY CTRL HEADLAMP SWITCH HIGH BEAM INDICATOR HIGH HIGH LOW LOW FLASH HIGHLINE OTHER HOT AT ALL TIMES INSTRUMENT CLUSTER J/C 4 (LEFT SIDE OF DASH) LEFT HEADLAMP LT GRN WIRE MULTI- FUNCTION SWITCH NEAR BOTTOM OF BRAKE BOOSTER) ORG/ WIRE POWER DISTRIBUTION CENTER (IN ENGINE COMPARTMENT, NEXT TO BATTERY) RED WIRE RED/ORG WIRE RED/WHT WIRE RIGHT HEADLAMP VIO WIRE VIO/WHT WIRE WHT WIRE

BLK WIRE BLK/GRY WIRE BLK/TAN WIRE BLU WIRE BRN WIRE BRN/WHT WIRE CENTRAL TIMER MODULE (BEHIND DASH, ON LEFT CENTER DASH PANEL SUPPORT) DK BLU WIRE DK DK DK DK DK DK GRN WIRE DK GRN/WHT WIRE FUSE 3 FUSE BLOCK (ON LEFT END OF DASH) GRN WIRE HOT IN RUN OR ACC INSTRUMENT CLUSTER INTERMITT WIPER SWITCH MUX J/C 2 (BEHIND DASH, ON LEFT CENTER PANEL SUPPORT BRACKET) J/C 4 (BEHIND DASH, ON LEFT CENTER DASH PANEL SUPPORT) LOW WASHER FLUID SENSE LT BLU WIRE MULTI- FUNCTION SWITCH NCA WIRE NEAR BOTTOM OF BRAKE BOOSTER) PARK SWITCH RED WIRE RED/LT BLU WIRE TAN WIRE VIO WIRE WASH SWITCH WASHER FLUID LEVEL SWITCH (BOTTOM OF WASHER RESERVOIR) WASHER SWITCH SENSE WHT WIRE WHT/BRN WIRE WINDSHIELD WASHER PUMP (ON BOTTOM OF WASHER FLUID RESERVOIR) WIPE/ WASH SWITCH WIPER MOTOR (ON PLENUM PANEL) WIPER PARK SWITCH SENSE WIPER RELAY (BEHIND GLOVE BOX, TAPED TO WIRE HARNESS) WIPER RELAY CONTROL WIPER SWITCH MODE SENSE

A/C COMP RLY A/C REQUEST A/C SELECT IN BRAKE SW IN AIR CONDITIONING AIR CONDITIONING SYSTEM ANTI-LOCK BRAKES SYSTEM ASD RELAY SENS TRANS OVERDRV AUTO SHT RLY CRUISE VAC SOL CRUISE VNT SOL BATT TEMP SENS BLK WIRE BLK/LT BLU WIRE BRN WIRE CAMSHAFT POSITION SENSOR CHECK ENGINE WARNING LAMP CRUISE CONTROL SYSTEM CRUISE SW IN DATA LINK CONNECTOR (BELOW STEERING COLUMN) DISTRIBUTOR 1 DK BLU WIRE DK BLU/ORG WIRE DK BLU/YEL WIRE DK GRN/BLK WIRE DK GRN/ORG WIRE ENGINE OIL PRESSURE SENSOR (ON REAR OF ENG, TO RIGHT OF DISTRIBUTOR) FUEL MONITOR SIG SCI TRANSMIT CCD BUS (-) SCI RECEIVE CCD BUS (+) FUEL PMP RLY FUSE 1 FUSE 17/18 GRY WIRE GRY/BLK WIRE HOT AT ALL TIMES IGNITION COIL INSTRUMENT CLUSTER LOGIC LT BLU/BLK WIRE LT GRN WIRE LT GRN/GRY WIRE LT GRN/RED WIRE NCA WIRE NEAR BOTTOM OF BRAKE BOOSTER) ORG/ WIRE ORG/DK BLU WIRE ORG/RED WIRE ORG/WHT WIRE OVERDRIVE SWITCH PNK WIRE PNK/YEL WIRE POWER DISTRI- BUTION CENTER POWER SUPPLY POWERTRAIN CONTROL MODULE (CENTER OF FIREWALL) RED WIRE RELAY & FUSE BLOCK STOP LAMP SWITCH SYSTEM TAN/RED WIRE TAN/YEL WIRE THROTTLE POSITION SENSOR (ON THROTTLE BODY ASSEMBLY) TRANS- MISSION RELAY VIO/BRN WIRE WARNING LAMP DRIVER WHT WIRE WHT/BLK WIRE WHT/DK BLU WIRE WHT/LT GRN WIRE WHT/PNK WIRE YEL/RED WIRE

8-BIT LOGIC A/C COMP RLY A/C REQUEST A/C SELECT IN BRAKE SW IN GENERATOR AIR CONDI- TIONING SYSTEM AIR CONDITIONING ANTI-LOCK BRAKES SYSTEM ASD RELAY SENS TRANS OVERDRV LEAK DETECT CTRL BATT TEMP SENS AUTO SHT RLY CRUISE VAC SOL CRUISE VNT SOL BATTERY TEMPERATURE SENSOR (AT BOTTOM OF BATTERY TRAY) BLK WIRE BLK/LT BLU WIRE BLK/ORG WIRE BRAKE LAMP SWITCH BRN WIRE CAMSHAFT POSITION SENSOR CHECK ENGINE WARNING LAMP CONTROL DRIVER CRUISE CONTROL SYSTEM CRUISE SW IN DATA LINK CONNECTOR (BELOW STEERING COLUMN) DAYTIME RUNNING LAMP MODULE DISTRIBUTOR DK BLU WIRE DK BLU/ORG WIRE DK BLU/WHT WIRE DK BLU/YEL WIRE DK GRN/BLK WIRE DK GRN/ORG WIRE EVAP/PURGE SOLENOID (IN ENG COMP, ON LEFT INNER WHEEL- HOUSE) FUEL MONITOR SIG SCI TRANSMIT CCD BUS (-) SCI RECEIVE CCD BUS (+) FUEL PMP RLY EVAP SOL DRVR FUSE 8 FUSE BLOCK GRY WIRE HOT AT ALL TIMES HOT IN RUN OR START IGNITION COIL INSTRUMENT CLUSTER LEAK DETECT SEN LEAK DETECTION PUMP (IN ENG COMPT, ON LEFT INNER WHEELHOUSE) LT BLU/BLK WIRE LT GRN WIRE LT GRN/GRY WIRE LT GRN/RED WIRE NCA WIRE NEAR BOTTOM OF BRAKE BOOSTER) ORG/ WIRE ORG/DK BLU WIRE ORG/DK GRN WIRE ORG/RED WIRE ORG/WHT WIRE OVERDRIVE SWITCH OXYGEN SENSOR DOWNSTREAM RELAY (CALI) PNK 9 10 WIRE PNK WIRE PNK/BLK WIRE PNK/WHT WIRE PNK/YEL WIRE POWER DISTRIBUTION CENTER POWER SUPPLY POWERTRAIN CONTROL MODULE (CENTER OF FIREWALL) RED WIRE RELAY & FUSE BLOCK FUSE 4 SYSTEM TAN/RED WIRE TAN/YEL WIRE THROTTLE POSITION SENSOR (ON THROTTLE BODY ASSEMBLY) TRANSMISSION RELAY VIO/BRN WIRE VIO/ORG WIRE VIO/TAN WIRE W/ DRL ONLY WHT/BLK WIRE WHT/DK BLU WIRE WHT/DK GRN WIRE WHT/LT GRN WIRE WHT/PNK WIRE YEL/RED WIRE

8-BIT LOGIC A/C COMP RLY A/C REQUEST A/C SELECT IN BRAKE SW IN GENERATOR AIR CONDI- TIONING SYSTEM AIR CONDITIONING ANTI-LOCK BRAKES SYSTEM ASD RELAY SENS TRANS OVERDRV LEAK DETECT CTRL BATT TEMP SENS AUTO SHT RLY CRUISE VAC SOL CRUISE VNT SOL BATTERY TEMPERATURE SENSOR (AT BOTTOM OF BATTERY TRAY) BLK WIRE BLK/LT BLU WIRE BLK/ORG WIRE BRAKE LAMP SWITCH BRN WIRE CAMSHAFT POSITION SENSOR CHECK ENGINE WARNING LAMP CONTROL DRIVER CRUISE CONTROL SYSTEM CRUISE SW IN DATA LINK CONNECTOR (BELOW STEERING COLUMN) DAYTIME RUNNING LAMP MODULE DISTRIBUTOR DK BLU WIRE DK BLU/ORG WIRE DK BLU/WHT WIRE DK BLU/YEL WIRE DK GRN/BLK WIRE DK GRN/ORG WIRE EVAP/PURGE SOLENOID (IN ENG COMP, ON LEFT INNER WHEEL- HOUSE) FUEL MONITOR SIG SCI TRANSMIT CCD BUS (-) SCI RECEIVE CCD BUS (+) FUEL PMP RLY EVAP SOL DRVR FUSE 8 FUSE BLOCK GRY WIRE HOT AT ALL TIMES HOT IN RUN OR START IGNITION COIL INSTRUMENT CLUSTER LEAK DETECT SEN LEAK DETECTION PUMP (IN ENG COMPT, ON LEFT INNER WHEELHOUSE) LT BLU/BLK WIRE LT GRN WIRE LT GRN/GRY WIRE LT GRN/RED WIRE NCA WIRE NEAR BOTTOM OF BRAKE BOOSTER) ORG/ WIRE ORG/DK BLU WIRE ORG/DK GRN WIRE ORG/RED WIRE ORG/WHT WIRE OVERDRIVE SWITCH OXYGEN SENSOR DOWNSTREAM RELAY (CALI) PNK 9 10 WIRE PNK WIRE PNK/BLK WIRE PNK/WHT WIRE PNK/YEL WIRE POWER DISTRIBUTION CENTER POWER SUPPLY POWERTRAIN CONTROL MODULE (CENTER OF FIREWALL) RED WIRE RELAY & FUSE BLOCK FUSE 4 SYSTEM TAN/RED WIRE TAN/YEL WIRE THROTTLE POSITION SENSOR (ON THROTTLE BODY ASSEMBLY) TRANSMISSION RELAY VIO/BRN WIRE VIO/ORG WIRE VIO/TAN WIRE W/ DRL ONLY WHT/BLK WIRE WHT/DK BLU WIRE WHT/DK GRN WIRE WHT/LT GRN WIRE WHT/PNK WIRE YEL/RED WIRE