Chevrolet Impala VIII (1999-2006) (top left front of radiator support) Wiring diagrams

BLK WIRE BREAKOUT) DK BLU WIRE DK GRN WIRE ECT GND ECT SIG ENGINE CONTROLS SYSTEM FAN CONT 1 FUSE FAN CONT 1 RELAY FAN CONT 2 RELAY FAN CONT 2, 3 FUSE FAN CONT 3 RELAY GRY WIRE HIGH SPD HOT AT ALL TIMES LEFT COOLING FAN (FRONT OF ENGINE COMPT) LOW SPD LT BLU WIRE ORG/ WIRE ORG/BLK WIRE POWERTRAIN CONTROL MODULE (PCM) (IN AIR CLEANER BOX) RIGHT COOLING FAN (FRONT OF ENGINE COMPT) UNDERHOOD JUNCTION BLOCK (BOTTOM) (ON FRONT OF RIGHT STRUT TOWER) WHT WIRE YEL WIRE

BEHIND ACCESS PANEL) BLK WIRE BLU WIRE BODY CONTROL MODULE (BEHIND LEFT SIDE OF DASH, ABOVE PARKING BRAKE LEVER) BRAKE SW FUSE BRN WIRE BRN/WHT WIRE CENTER HIGH MOUNTED STOP LAMP (CHMSL) CRUISE CONTROL SYSTEM ANTI-LOCK BRAKES SYSTEM DK BLU WIRE DK GRN WIRE DK LT FRONT PARK LP FUSE GRY WIRE HAZ SW FUSE HAZARD HAZARD NORMAL HAZARD SIG SW OUT HAZARD SWITCH HEAD HEADLAMP SWITCH HOT AT ALL TIMES HOT IN RUN OR START ILLUM INSTRUMENT PANEL CLUSTER (IPC) INTERIOR LIGHTS LEFT HEADLAMP LEFT I/P JUNCTION BLOCK LEFT I/P JUNCTION BLOCK (LEFT SIDE LEFT I/P JUNCTION BLOCK (LEFT SIDE OF DASH, LEFT LICENSE LAMP RIGHT LICENSE LAMP LEFT TAIL LAMP PARK TURN/ STOP LEFT TURN INDICATOR LOGIC LEFT TURN INPUT LOGIC LT BLU WIRE OF DASH, BEHIND ACCESS PANEL) OFF ORG/ WIRE PANEL) PARK PARK LP RELAY PARK TURN LEFT FRONT PARK/ TURN LAMP PNK WIRE POWER DISTRIBUTION SYSTEM PPL REAR PARK LP FUSE RED WIRE RIGHT HEADLAMP RIGHT I/P JUNCTION BLOCK (RIGHT SIDE OF DASH, BEHIND ACCESS RIGHT I/P JUNCTION BLOCK (RIGHT SIDE OF DASH, BEHIND ACCESS PANEL) RIGHT TAIL LAMP PARK TURN/ STOP RIGHT TURN INDICATOR RIGHT TURN INPUT STOPLAMP SWITCH (ON BRAKE PEDAL SUPPORT) TURN PARK RIGHT FRONT PARK/ TURN LAMP TURN SIG SW OUT TURN SIGNAL FUSE TURN SIGNAL/ MULTI- FUNCTION RIGHT SWITCH (IN LEFT STEERING COLUMN) WHT WIRE YEL WIRE

17 18 STOP LMP SIG LR LAMP PWR RR LAMP PWR B/U LMP PWR GROUND ANTI-LOCK BRAKES SYSTEM AUX PWR FUSE BACK-UP LAMPS CIRUIT BACK-UP LAMPS CIRUIT 1750 340 BLK WIRE BLOCK (LEFT SIDE OF DASH, BEHIND ACCESS PANEL) BLU WIRE BLUNT CUT) BODY CONTROL MODULE (BEHIND LEFT SIDE OF DASH, ABOVE PARKING BRAKE LEVER) BRAKE SW FUSE BRN WIRE BRN/WHT WIRE CENTER HIGH MOUNTED STOP LAMP (CHMSL) RIGHT TAIL LAMP CRUISE CONTROL SYSTEM DK BLU WIRE DK GRN WIRE DK LT EMERGENCY VEHICLE REAR LAMPS FLASHER (UPPER RIGHT FRONT OF REAR COMPARTMENT) FRONT PARK LP FUSE GRN DK WIRE GRY WIRE HAZ SW FUSE HAZARD HAZARD NORMAL HAZARD SIG SW OUT HAZARD SWITCH HEAD HOT AT ALL TIMES HOT AT ALL TIMES UNDERHOOD JUNCTION BLOCK (TOP) RT I/P 1 FUSE HOT IN RUN OR START ILLUM INDICATOR LEFT TURN INDICATOR RIGHT TURN INPUT INSTRUMENT PANEL CLUSTER (IPC) INTERIOR LIGHTS LEFT EMERGENCY VEHICLE REAR WINDOW PANEL LAMP LEFT HEADLAMP LEFT I/P JUNCTION LEFT I/P JUNCTION BLOCK LEFT I/P JUNCTION BLOCK (LEFT SIDE OF DASH, BEHIND ACCESS PANEL) LEFT LICENSE LAMP LEFT TAIL LAMP LEFT TURN LOGIC LT BLU WIRE LT GRN WIRE NCA WIRE OFF HEADLAMP SWITCH ORG/ WIRE PANEL) PARK PARK LP RELAY PARK TURN LEFT FRONT PARK/ TURN LAMP PARK TURN/ STOP PNK WIRE PPL REAR PARK LP FUSE RED WIRE RIGHT (IN LEFT STEERING COLUMN) RIGHT EMERGENCY VEHICLE REAR WINDOW PANEL LAMP RIGHT HEADLAMP RIGHT I/P JUNCTION BLOCK RIGHT I/P JUNCTION BLOCK (RIGHT SIDE OF DASH, BEHIND ACCESS PANEL) RIGHT LICENSE LAMP RIGHT TURN STOPLAMP SWITCH (ON BRAKE PEDAL SUPPORT) TURN PARK TURN/ STOP RIGHT FRONT PARK/ TURN LAMP TURN SIG SW OUT TURN SIGNAL FUSE TURN SIGNAL/ MULTI-FUNCTION SWITCH WHT WIRE YEL WIRE

3.4L 3.8L 3.8L (VIN K), 3.4L A/C COMPRESSOR CLUTCH AUTOMATIC TRANSAXLE BATTERY BLK WIRE BRAKE PRESSURE MODULATOR VALVE (BPMV) CRUISE CONTROL MODULE (CCM) ELECTRONIC BRAKE CONTROL MODULE (EBCM) ENGINE OIL LEVEL SWITCH ENGINE OIL PRESSURE (EOP) SWITCH MASS AIR- FLOW (MAF) SENSOR HEATED OXYGEN SENSOR HORN ASSEMBLY IGNITION CONTROL MODULE (ICM) IGNITION CONTROL MODULE (ICM) A/C COMPRESSOR CLUTCH DIODE LEFT COOLING FAN LEFT FRONT FOG LAMP RIGHT FRONT FOG LAMP LEFT HEADLAMP NCA WIRE POWERTRAIN CONTROL MODULE (PCM) RADIO RIGHT HEADLAMP RIGHT I/P JUNCTION BLOCK (RIGHT SIDE OF DASH, BEHIND ACCESS PANEL) SENSOR 2 VEHICLE COMMUNICATION INTERFACE MODULE (VCIM) W/ SEO W/O EMERGENCY VEHICLE HANDLAMPS FLASHER W/O SEO WHT WIRE WINDSHIELD WASHER FLUID LEVEL SWITCH WINDSHIELD WASHER FLUID PUMP

AC HEADLAMP RELAY AMBIENT LIGHT SENSOR (TOP RIGHT OF DASH, NEAR DEFOGGER OUTLET) BLK WIRE BLK/WHT WIRE BLOCK (LEFT SIDE OF DASH, BEHIND ACCESS PANEL) BODY CONTROL MODULE (BCM) (BEHIND LEFT SIDE OF DASH, ABOVE PARKING BRAKE LEVER) BRN WIRE COMPUTER DATA LINES SYSTEM DK BLU WIRE DK GRN/WHT WIRE DRL RELAY DRL RELAY SERIAL DATA FOG LP RELAY HIGH BEAM IN HEADLAMP RLY DRL/EXT LTS FUSE EXT LTS FUSE FOG LAMP INDICATOR FOG LAMP SWITCH FOG LIGHT RELAY FOG LP SW PARK BRAKE IN GROUND DISTRIBUTION SYSTEM GRY WIRE HEAD HEADLAMP DIMMER SWITCH HEADLAMP SW AL SENS SIG AL SENS REF 1138 1137 HEADLAMP SWITCH HIGH BEAM HIGH BEAM IND HIGH BEAM OUT HOT AT ALL TIMES IPC CLASS 2 SERIAL DATA LEFT FRONT FOG LAMP LEFT HEADLAMP LEFT I/P JUNCTION LEFT I/P JUNCTION BLOCK (LEFT SIDE OF DASH, BEHIND ACCESS PANEL) LOGIC INSTRUMENT PANEL CLUSTER (IPC) LOW BEAM LT BLU WIRE LT GRN WIRE LT GRN/BLK WIRE MESSAGE CENTER OFF ORG/ WIRE PARK PARK BRAKE SWITCH (AT BASE OF PARKING BRAKE ASSEMBLY) PNK PNK WIRE PNK WIRE PPL RIGHT FRONT FOG LAMP RIGHT HEADLAMP LOW BEAM TURN SIGNAL/ MULTIFUNCTION SWITCH UNDERHOOD JUNCTION BLOCK (TOP) UNDERHOOD JUNCTION BLOCK (TOP) (ON FRONT OF RIGHT STRUT TOWER) UNDERHOOD JUNCTION BLOCK (TOP) FOG RLY FUSE YEL WIRE YEL/BLK WIRE

AC HEADLAMP RELAY AMBIENT LIGHT SENSOR (TOP RIGHT OF DASH, NEAR DEFOGGER OUTLET) BLK WIRE BLK/WHT WIRE BLOCK (LEFT SIDE OF DASH, BEHIND ACCESS PANEL) BLUNT CUT WIRE PNK BODY CONTROL MODULE (BEHIND LEFT SIDE OF DASH, ABOVE PARKING BRAKE LEVER) BRN WIRE COMPUTER DATA LINES SYSTEM DK BLU WIRE DK GRN/WHT WIRE DRL RELAY DRL RELAY SERIAL DATA FOG LP RELAY HIGH BEAM IN HEADLAMP RLY DRL/EXT LTS FUSE EMERGENCY VEHICLE HEADLAMPS FLASHER (FORWARD OF RADIATOR SUPPORT) EXT LTS FUSE FOG LAMP INDICATOR FOG LAMP SWITCH FOG LIGHT RELAY FOG LP SW PARK BRAKE IN FOG RLY FUSE GROUND DISTRIBUTION SYSTEM GRY WIRE HEAD HEADLAMP DIMMER SWITCH HEADLAMP SW AL SENS SIG AL SENS REF 1138 1137 HEADLAMP SWITCH HIGH BEAM HIGH BEAM IND MESSAGE CENTER HIGH BEAM OUT HOT AT ALL TIMES INSTRUMENT PANEL CLUSTER (IPC) IPC CLASS 2 SERIAL DATA LEFT FRONT FOG LAMP LEFT HEADLAMP LEFT I/P JUNCTION LEFT I/P JUNCTION BLOCK (LEFT SIDE OF DASH, BEHIND ACCESS PANEL) LOGIC LOW BEAM LT BLU WIRE LT GRN WIRE LT GRN/BLK WIRE NCA WIRE OFF ORG/ WIRE PARK PARK BRAKE SWITCH (AT BASE OF PARKING BRAKE ASSEMBLY) PNK PNK WIRE PNK WIRE PPL RIGHT FRONT FOG LAMP RIGHT HEADLAMP LOW BEAM TURN SIGNAL/ MULTIFUNCTION SWITCH (IN STEERING COLUMN) UNDERHOOD JUNCTION BLOCK (TOP) YEL WIRE YEL/BLK WIRE

BLK WIRE DK GRN WIRE HORN ASSEMBLY (LOWER RIGHT FRONT OF VEHICLE) HORN RELAY HORN RELAY FUSE HORN SWITCH HOT AT ALL TIMES NCA WIRE ORG/ WIRE SLIP RING SPRING STEERING COLUMN HORN BRUSH UNDERHOOD JUNCTION BLOCK (TOP) (ON FRONT OF RIGHT STRUT TOWER)

39 26 27 34 COMP CONTROL ECT SIGNAL A/C PRESS SIGNAL 59 5 6 13 80 CLASS 2 SERIAL HIGH SPEED LOW SPEED ECT GROUND LOW REFERENCE A/C CMPR RELAY A/C COMPRESSOR CLUTCH A/C REFRIGERANT PRESSURE SENSOR (ON LEFT SIDE OF ENGINE COMPT, ON LIQUID LINE) A/C REQUEST IND A/C REQUEST SIG A/C REQUEST SWITCH A/C RLY (CMPR) FUSE A/C RLY (COIL) FUSE BATTERY POSITIVE BLK WIRE BLK/WHT WIRE BLOWER MOTOR BLOWER MOTOR (ON RIGHT BOTTOM OF HEATER-A/C ASSEMBLY) BLOWER MOTOR CONTROL PROCESSOR (LOWER RIGHT SIDE OF DASH) BODY CONTROL MODULE (BEHIND LEFT SIDE OF DASH, ABOVE PARKING BRAKE LEVER) BREAKOUT) BREAKOUT) (3.8L (VIN K): LEFT REAR OF ENGINE, 6.5 CM FROM EGR VALVE BREAKOUT) BRN WIRE COMPUTER DATA LINES SYSTEM D TEMP CONTROL SWITCH DEFOG SWITCH DEFOGGER SYSTEM COMPUTER DATA LINES SYSTEM DK BLU WIRE DK BLU/WHT WIRE DK GRN WIRE DK GRN/WHT WIRE DR CTRL A DR CTRL B DR CTRL A DR CTRL B DOOR CTRL A DOOR CTRL B ENGINE CONTROLS SYSTEM ENGINE COOLANT TEMPERATURE FAN CONT 1 FUSE FAN CONT 1 RELAY FAN CONT 2 RELAY FAN CONT 2, 3 FUSE FAN CONT 3 RELAY GROUND GRY WIRE GRY/BLK WIRE HOT AT ALL TIMES HOT IN ON HVAC BLOWER FUSE HVAC CLASS 2 SERIAL DATA HVAC CLASS 2 SERIAL DATA BATTERY ILLUM LEFT AIR TEMPERATURE ACTUATOR (ON LEFT SIDE OF HEATER- A/C ASSEMBLY) LEFT COOLING FAN (FRONT OF ENGINE COMPT) LT BLU WIRE LT GRN WIRE LT GRN/BLK WIRE MODE ACTUATOR (LOWER RIGHT SIDE OF DASH) MODE SWITCH NCA WIRE ORG/ WIRE ORG/BLK WIRE OUT SIDE AIR IND OUT SIDE AIR SWITCH P TEMP CONTROL SWITCH PNK IGN 3 VOLT GROUND WIRE PNK WIRE PNK/WHT WIRE POWER DISTRIBUTION SYSTEM PPL REAR DEFOG RLY CTRL RECIRCULATION ACTUATOR RECIRCULATION IND RECIRCULATION SWITCH RED WIRE RED/BLK WIRE RIGHT AIR TEMPERATURE ACTUATOR (ON RIGHT SIDE OF HEATER- A/C ASSEMBLY) RIGHT COOLING FAN (FRONT OF ENGINE COMPT) S121 (3.4L (VIN E)) (FUEL INJECTOR JUMPER SPEED CTRL SPEED CTRL DOOR CTRL POSITION SIG STARTER SUPPLY VOLTAGE TAN WIRE UNDERHOOD JUNCTION BLOCK (TOP) (ON FRONT OF RIGHT STRUT TOWER) VOLTAGE WHT WIRE WHT/BLK WIRE YEL WIRE

BLK WIRE DK GRN WIRE GRY WIRE HI LO HI MIST LO OFF INSTRUMENT PANEL CLUSTER (IPC) LO OFF LOGIC WINDSHIELD WASHER FLUID LEVEL SIGNAL MESSAGE CENTER LOW WASHER FLUID MIST NCA WIRE OFF PARK SWITCH PPL PULSE TIMER CIRCUITRY RED WIRE WASHER SWITCH WHT WIRE WINDSHIELD WASHER FLUID LEVEL SWITCH (IN WASHER FLUID RESERVOIR) WINDSHIELD WASHER FLUID PUMP (IN WINDSHIELD WASHER FLUID RESERVOIR) WINDSHIELD WIPER SYSTEM MODULE (ON LEFT SIDE OF FIREWALL, IN ENGINE COMPT) WINDSHIELD WIPER/WASHER SWITCH WIPER SWITCH YEL WIRE