Chevrolet Impala VIII (1999-2006) (under dash, to right of steering column) Wiring diagrams

BATT RUNDOWN PROTECTION RELAY BEHIND ACCESS PANEL) BLK WIRE BLK/WHT WIRE BLU WIRE BODY CONTROL MODULE (BEHIND LEFT SIDE OF DASH, ABOVE PARKING BRAKE LEVER) COURTESY LMP RLY CTRL LOW CTRL GROUND CRTSY LMP V DIC/ RKE FUSE DK BLU WIRE DK BLU/WHT WIRE DK DK DOME OFF SURVEILLANCE MODE SWITCH (W/ POLICE PACKAGE, LIMITED CONTENT) HEADLAMP SWITCH PPL HOT AT ALL TIMES I/P BRP FUSE LEFT I/P COURTESY LAMP LEFT I/P JUNCTION BLOCK (LEFT SIDE OF DASH, BEHIND ACCESS PANEL) NCA WIRE ORG/ WIRE PPL MODE SW SIG DOME LMP SW REAR COMPARTMENT LID AJAR SWITCH RED WIRE RED/BLK WIRE RIGHT I/P COURTESY LAMP RIGHT I/P JUNCTION BLOCK (RIGHT SIDE OF DASH, TO SPLICE TRK/ROOF BRP FUSE WHT WIRE

AJAR AUXILIARY DOME LAMP (POLICE) BLK WIRE BLK/WHT WIRE BLOCK (RIGHT SIDE OF DASH, BEHIND ACCESS PANEL) BODY CONTROL MODULE (BEHIND LEFT SIDE OF DASH, ABOVE PARKING BRAKE LEVER) CLOSED OPEN DK BLU WIRE DK BLU/WHT WIRE DOME LAMP (W/O READING LIGHTS) DOOR AJAR DOOR OPEN DRIVER DOOR LOCK DRIVER DOOR LOCK SWITCH FROM RIGHT I/P JUNCTION BLOCK (DIAGRAM 1 OF 2) FRONT PASSENGER DOOR LOCK FRONT PASSENGER DOOR LOCK SWITCH GRY WIRE INSIDE REAR VIEW MIRROR LEFT COURTESY/ READING LAMP (IF EQUIPPED) LEFT I/P JUNCTION BLOCK (LEFT SIDE OF DASH, BEHIND ACCESS PANEL) LEFT REAR DOOR LOCK (IMPALA) LEFT VANITY MIRROR LAMP (IF EQUIPPED) LMP CNTRL LT BLU/WHT WIRE NCA WIRE RIGHT COURTESY/ READING LAMP (IF EQUIPPED) RIGHT I/P JUNCTION RIGHT I/P JUNCTION BLOCK (RIGHT SIDE OF DASH, BEHIND ACCESS PANEL) RIGHT REAR DOOR LOCK (IMPALA) RIGHT VANITY MIRROR LAMP (IF EQUIPPED) W/ LIGHTED VANITY, POLICE W/ ONSTAR W/O ONSTAR W/O LIGHTED VANITY, POLICE WHT 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)

3.4L 3.8L A/C-CRUISE FUSE ABS IND. AIR BAG IND AMBIENT AIR TEMPERATURE SENSOR (FRONT OF RADIATOR SUPPORT) AMBIENT TEMP SUNROOF CLOSE SUNROOF SW SUNROOF OPEN BATTERY SERIAL DATA BATTERY BRAKE LVL DATA LINE IGNITION WASH LVL GROUND BLK WIRE BLK/WHT WIRE BOOST GAUGE BRAKE IND BRAKE/ BREAKOUT) BRN WIRE BRN/WHT WIRE CHECK (MALFUNCTION INDICATOR LAMP-MIL) COMPUTER DATA LINES SYSTEM CRUISE IND DASH, BEHIND ACCESS PANEL) DIC/ RKE FUSE DISPLAY DK BLU WIRE DRIVER INFORMATION CENTER (DIC) ENGINE COOLANT TEMPER- ATURE GAUGE ENGINE OIL LEVEL SWITCH (OPEN W/ LOW OIL LEVEL) (3.8L) ENGINE OIL PRESSURE GAUGE FUEL GAUGE FUEL PUMP, SENDER ASSEMBLY FUEL LEVEL SENSOR GND RIGHT TURN INPUT GND LEFT TURN INPUT GRY WIRE HIGH BEAM IND HOT AT ALL TIMES HOT IN HOT IN RUN OR START IGNITION IGNITION GROUND ILLUMINATION (7 BULBS) INSTRUMENT PANEL CLUSTER INTERNAL COMPASS SENSOR (W/O SUNROOF) LEFT I/P JUNCTION BLOCK (LEFT SIDE OF DASH, BEHIND ACCESS PANEL) CLSTR/ BCM FUSE LEFT TURN IND LOGIC LOW REF LT BLU WIRE LT GRN WIRE LT GRN/BLK WIRE MESSAGE CENTER MIL CTRL NCA WIRE ODOMETER/ PRNDL DISPLAY OIL LEVEL SWITCH SIGNAL OIL PRESSURE SWITCH SIGNAL ORG/ WIRE PCM/BCM CLSTR FUSE POWER DISTRIBUTION SYSTEM (PASSENGER COMPT, 10 CM POWER TOPS SYSTEM POWERTRAIN CONTROL MODULE (PCM) PPL PPL FUEL LEVEL SENSOR SIGNAL RED WIRE RESET SWITCH RIGHT I/P JUNCTION BLOCK (RIGHT SIDE OF RIGHT I/P JUNCTION BLOCK (RIGHT SIDE OF DASH, BEHIND ACCESS PANEL) RIGHT TURN IND RUN WIRE SEAT BELT IND SERVICE ENGINE SOON IND SPEEDO- METER TACHO- METER TAN WIRE TAN/BLK WIRE TRAC OFF IND VF DISPLAY DRIVER VOLT- METER W/O POLICE WHT WIRE WIPER/ WASHER SYSTEM (OR 685) EXTERIOR LIGHTS SYSTEM YEL WIRE

BLK WIRE BLK/WHT WIRE BODY CONTROL MODULE (BEHIND LEFT SIDE OF DASH, ABOVE PARKING BRAKE LEVER) BRN WIRE FULL BRIGHT GRY WIRE GRY/BLK WIRE HEAD PARK LAMP SWITCH HEADLAMP SWITCH HOT AT ALL TIMES I/P DIMMING SWITCH INT DIM CTRL RELAY CTRL GROUND GROUND GROUND LEFT CRUISE CONTROL (SET/ COAST) LEFT I/P JUNCTION BLOCK (LEFT SIDE OF DASH, BEHIND ACCESS PANEL) LEFT RADIO CONTROL (SEEK/ PRESET) LOW DIM LT BLU WIRE NCA WIRE OFF PARK PARK LAMP RELAY PARK LAMP SWITCH INPUT REAR PARK LMP FUSE RED WIRE RIGHT CRUISE CONTROL (RESUME/ ACCEL) RIGHT I/P 1 FUSE RIGHT I/P JUNCTION BLOCK (RIGHT SIDE OF DASH, BEHIND ACCESS PANEL) RIGHT RADIO CONTROL (VOLUME/ MODE) STEERING COLUMN FUSE STEERING WHEEL) TO HVAC CONTROL MODULE (DIAGRAM 2 OF 2) TO LEFT I/P JUNCTION BLOCK (DIAGRAM 2 OF 2) UNDERHOOD JUNCTION BLOCK (TOP) (ON FRONT OF RIGHT STRUT TOWER) WHT WIRE

ACCESS PANEL) ASHTRAY LAMP (W/O FRONT CONSOLE) BLK WIRE DIM INPUT DRIVER HEATED SEAT SWITCH (MONTE CARLO) FOG LAMP SWITCH (IF EQUIPPED) FROM LEFT I/P JUNCTION BLOCK (DIAGRAM 1 OF 2) FROM LEFT I/P JUNCTION BLOCK (DIAGRAM 2 OF 2) FRONT PASSENGER DOOR LOCK SWITCH FRONT PASSENGER HEATED SEAT SWITCH (MONTE CARLO) FRONT PASSENGER WINDOW SWITCH GRY WIRE HAZARD SWITCH HVAC CONTROL MODULE INSTRUMENT PANEL CLUSTER (IPC) (9 BULBS) LEFT I/P JUNCTION BLOCK LEFT I/P JUNCTION BLOCK (LEFT SIDE OF DASH, BEHIND OUTSIDE REARVIEW MIRROR SWITCH DRIVER DOOR LOCK SWITCH RADIO RIGHT I/P JUNCTION BLOCK (RIGHT SIDE OF DASH, BEHIND ACCESS PANEL) SURVEILLANCE MODE SWITCH TO LEFT I/P JUNCTION BLOCK (DIAGRAM 2 OF 2) TRACTION CONTROL SWITCH (IMPALA) TRACTION CONTROL SWITCH (MONTE CARLO) W/ POLICE, LIMITED CONTENT W/O POLICE, LIMITED CONTENT WHT WIRE

AUDIO AMPLIFIER (W/ PERFORMANCE ENHANCED SPEAKER) BATTERY BLK WIRE BLK/WHT WIRE BLOWER MOTOR CONTROL PROCESSOR BLUNT CUT WIRE AT RIGHT FRONT FLOOR BREAKOUT) CIRCUIT BREAKER 1 CIRCUIT BREAKER 2 CIRCUIT BREAKER 3 COOLING FANS FUSE CRANK RLY RELAY DK GRN WIRE DRIVER OUTSIDE REARVIEW MIRROR DIGITAL RADIO RECEIVER (W/ DIGITAL RADIO) ELECTRONIC BRAKE CONTROL MODULE (EBCM) FROM CRANK RELAY (DIAGRAM 2 OF 5) FROM RIGHT I/P 3 FUSE (DIAGRAM 1 OF 5) FUSE BLOCK (SEO) (BEHIND DASH, RIGHT OF STEERING COLUMN) FUSIBLE LINK FUSIBLE LINK (10 GA-RUST) FUSIBLE LINK FUSIBLE LINK GENERATOR HTD MIR FUSE HVAC BLOWER FUSE IGN RLY RELAY IGN SW FUSE LEFT I/P FUSE LEFT I/P JUNCTION BLOCK (LEFT SIDE OF DASH, BEHIND ACCESS PANEL) NCA WIRE ORG/ WIRE PASSENGER OUTSIDE REARVIEW MIRROR PNK WIRE RADIO RADIO ANTENNA MODULE RADIO FUSE REAR BRKR DEFOG CIRCUIT BREAKER REAR DEFOG RELAY REAR JUNCTION BLOCK (BEHIND RIGHT REAR WHEELWELL) RED WIRE RIGHT I/P 1 FUSE RIGHT I/P 2 FUSE RIGHT I/P 3 FUSE SEO RELAY SEO RELAY STARTER TO FAN CONT 1 FUSE (DIAGRAM 3 OF 5) TO IGNITION SWITCH (DIAGRAM 2 OF 5) TO LEFT I/P JUNCTION BLOCK (DIAGRAM 3 OF 5) TO REAR DEFOG RELAY (DIAGRAM 1 OF 5) TO RIGHT I/P JUNCTION BLOCK (DIAGRAM 4 OF 5) TO RIGHT I/P JUNCTION BLOCK (DIAGRAM 5 OF 5) TO UNDERHOOD JUNCTION BLOCK (BOTTOM) (DIAGRAM 3 OF 5) TO UNDERHOOD JUNCTION BLOCK (TOP) (DIAGRAM 5 OF 5) U/HOOD 1 FUSE U/HOOD 2 FUSE UNDERHOOD JUNCTION BLOCK (TOP) UNDERHOOD JUNCTION BLOCK (TOP) (ON FRONT OF RIGHT STRUT TOWER) W/ SEO

1-2 SHIFT SOLENOID (1-2 SS) VALVE 2-3 SHIFT SOLENOID (2-3 SS) VALVE 3.4L 3.4L 3.8L 3.8L 3.4L A/C CMPR RELAY A/C RLY (COIL) FUSE AUTOMATIC TRANSAXLE BLK WIRE BODY CONTROL MODULE (BCM) DATA LINK CONNECTOR (DLC) DFI MDL FUSE DK GRN WIRE DR LK FUSE PWR MIR FUSE CLSTR/ BCM FUSE DRIVER HEATED SEAT RELAY (W/ HEATED SEAT) DRIVER SEAT DRIVER WINDOW SWITCH SUNROOF MODULE ENG DEVICES FUSE EVAPORATIVE EMISSION (EVAP) CANISTER PURGE SOLENOID FAN CONT 1 FUSE FAN CONT 1 RELAY FAN CONT 2, 3 FUSE FAN CONT 2 RELAY FAN CONT 3 RELAY FROM COOLING FANS FUSE (DIAGRAM 1 OF 5) FROM IGN RLY RELAY (DIAGRAM 1 OF 5) FROM LEFT I/P FUSE (DIAGRAM 1 OF 5) FRONT PASSENGER WINDOW SWITCH FUEL INJ FUSE FUEL INJECTOR 1 FUEL INJECTOR 2 FUEL INJECTOR 3 FUEL INJECTOR 4 FUEL INJECTOR 5 FUEL INJECTOR 6 HEAD- LAMP RELAY HEATED OXYGEN SENSOR IGNITION CONTROL MODULE (ICM) INSTRUMENT PANEL CLUSTER (IPC) BODY CONTROL MODULE (BCM) LEFT I/P JUNCTION BLOCK (LEFT SIDE OF DASH, BEHIND ACCESS LH HTD ST/BCM FUSE MASS AIR FLOW (MAF SENSOR) MONTE CARLO NCA WIRE ORG/ WIRE OUTSIDE REARVIEW MIRROR SWITCH BODY CONTROL MODULE (BCM) OXY SEN FUSE PANEL) PNK PNK FUEL INJECTOR 1 BREAKOUT, FUEL INJECTOR 2 BREAKOUT) WIRE PNK PNK WIRE PNK WIRE RED WIRE RETAINED ACCSRY POWER RELAY RETAINED ACCSRY PWR BRKR CIRCUIT BREAKER RIGHT I/P JUNCTION BLOCK (RIGHT SIDE OF DASH, BEHIND ACCESS PANEL) SENSOR 1 SENSOR 2 TORQUE CONVERTER CLUTCH (TCC) SOLENOID VALVE TRANS SOL FUSE UNDERHOOD JUNCTION BLOCK (BOTTOM) (ON FRONT OF RIGHT STRUT TOWER) W/O SEO YEL WIRE

A/C CMPR RELAY A/C RLY (CMPR) FUSE AUX PWR FUSE AUXILIARY POWER OUTLET (W/O CONSOLE) AUXILIARY POWER OUTPUT (W/ CONSOLE) BLK WIRE BRK SW FUSE C/LTR FUSE CIGAR LIGHTER (W/ CONSOLE) CIGAR LIGHTER (W/O CONSOLE) DRL/EXT LTS FUSE EMERGENCY VEHICLE HEADLAMPS FLASHER EMERGENCY VEHICLE REAR LAMPS FLASHER EXT LTS FUSE F/PMP RLY FUSE FOG LTS RELAY FOG RLY FUSE FROM CIG/AUX FUSE (DIAGRAM 2 OF 5) FROM PWR DROP FUSE (DIAGRAM 4 OF 5) FROM RIGHT I/P 2 FUSE (DIAGRAM 1 OF 5) FROM U/HOOD 1 FUSE (DIAGRAM 1 OF 5) FUEL PUMP RELAY DRL RLY RELAY HAZ SW FUSE HAZARD SWITCH HORN RLY FUSE HORNS RELAY LEFT HEADLAMP LEFT SPOT LAMP (W/ SEO) NCA WIRE NOT USED NOT USED ORG/ WIRE PCM FUSE POWERTRAIN CONTROL MODULE (PCM) RIGHT HEADLAMP RED WIRE RIGHT I/P JUNCTION BLOCK (RIGHT SIDE OF DASH, BEHIND ACCESS PANEL) RIGHT SPOT LAMP (W/ SEO) SPOT LAMP-L FUSE STOP LAMP SWITCH UNDERHOOD JUNCTION BLOCK (BOTTOM) (ON FRONT OF RIGHT STRUT TOWER) GENERATOR UNDERHOOD JUNCTION BLOCK (TOP) (ON FRONT OF RIGHT SPOT LAMP-R FUSE STRUT TOWER) W/ FRONT FOG LAMPS W/ HEADLAMP FLASHERS W/ HEADLAMP FLASHERS W/O HEADLAMP FLASHERS W/ SEO W/O HEADLAMP FLASHERS W/O SEO WHT WIRE YEL WIRE

1 2 3 4 BATTERY SERIAL DATA SIG 1940 1344 1840 294 295 139 694 781 1251 TRUNK, TAILGATE, FUEL DOORS SYSTEM B+ GROUND SERIAL DATA SIG IGNITION 0 SERIAL DATA BCM FUSE BLK WIRE BLK/WHT WIRE BLU WIRE BODY CONTROL MODULE (BEHIND LEFT SIDE OF DASH, ABOVE PARKING BRAKE LEVER) CLOSED AJAR OPEN CLSTR/BCM FUSE CTSY DK BLU WIRE DK BLU/WHT WIRE DOOR AJAR IN ACC SIG IN LF DR OPEN IN DOOR LOCK DOWN DR LK FUSE DRIVER DOOR LOCK DRIVER DOOR LOCK CYLINDER SWITCH DRIVER DOOR LOCK SWITCH FRONT PASSENGER DOOR LOCK CYLINDER SWITCH (IF EQUIPPED) FRONT PASSENGER DOOR LOCK SWITCH GROUND GRY WIRE HOT AT ALL TIMES HOT IN ACC, ON OR START HOT IN ON OR ACC HOT IN ON OR START ILLUM ENTRY IMPALA LEFT I/P JUNCTION BLOCK (LEFT SIDE OF DASH, BEHIND ACCESS PANEL) LEFT REAR DOOR LOCK (IMPALA) LH HTD ST/BCM FUSE LOCK LT BLU WIRE LT GRN WIRE ORG/ WIRE ORG/BLK WIRE PCM/BCM CLSTR FUSE PNK PNK WIRE PNK WIRE POWER DISTRIBUTION SYSTEM PPL COMPUTER DATA LINES SYSTEM PPL PPL REMOTE CONTROL DOOR LOCK RECEIVER (RCDLR) (ON UPPER CENTER OF DASH) RIGHT I/P JUNCTION BLOCK (RIGHT SIDE OF DASH, BEHIND ACCESS PANEL) RIGHT I/P JUNCTION BLOCK (RIGHT SIDE OF DASH, BEHIND ACCESS PANEL) DIC/RKE FUSE STOP FUSE TAN WIRE UNLOCK UNLOCK LOCK W/ ANTI- THEFT W/ SEO WHT WIRE YEL WIRE