Chevrolet Impala VIII (1999-2006) computer data lines system Wiring diagrams

1317 1969 FOG LAMP RLY CTRL HEADLAMP RLY CTRL 389 1844 192 VEHICLE SPEED SIG PK BRAKE IND SUPPLY VOLTAGE FRONT FOG LAMP SW SIG 727 74 DOOR OPEN SW SIG PARK LAMP SW SIG 762 43 A/C REQUEST SIG ACCESSORY VOLTAGE AIR CONDITIONING SYSTEM BCM FUSE BLK WIRE BLK/WHT WIRE BODY CONTROL MODULE (BEHIND LEFT SIDE OF DASH, ABOVE PARKING BRAKE LEVER) BRN/WHT WIRE CLASS 2 SERIAL DATA GROUND GROUND DRL RLY CTRL CLSTR/ BCM FUSE COMPUTER DATA LINES SYSTEM COURTESY LAMP LOW CTRL KEYLESS ENTRY SERIAL DATA IGNITION 0 VOLTAGE COURTESY LAMP RLY CTRL PARK LAMP RLY CTRL BATTERY POSITIVE VOLTAGE CRUISE CONTROL SYSTEM INSTRUMENT CLUSTER SYSTEM HEADLIGHTS SYSTEM DK BLU WIRE DK BLU/WHT WIRE DK GRN WIRE DK GRN/WHT WIRE DOOR LOCKS SYSTEM EXTERIOR LIGHTS SYSTEM DR LK FUSE GRY WIRE HEADLIGHTS SYSTEM HEADLIGHTS SYSTEM DOOR LOCKS SYSTEM HEADLIGHTS SYSTEM HEADLIGHTS SYSTEM HEADLIGHTS SYSTEM HORNS SYSTEM EXTERIOR LIGHTS SYSTEM HOT AT ALL TIMES HOT IN ACC OR ON HOT IN ACC, ON OR START HOT IN ON OR START INTERIOR LIGHTS SYSTEM DOOR LOCKS SYSTEM INTERIOR LIGHTS SYSTEM EXTERIOR LIGHTS SYSTEM LEFT I/P JUNCTION BLOCK (LEFT SIDE OF DASH, BEHIND ACCESS PANEL) LH HTD ST/BCM FUSE LT BLU WIRE LT GRN WIRE LT GRN/BLK WIRE ORG/ WIRE ORG/BLK WIRE PCM/BCM CLUSTER FUSE PNK PNK WIRE PNK WIRE POWER DISTRIBUTION SYSTEM PPL PPL PPL RED/BLK WIRE STOP FUSE TAN WIRE TAN/WHT WIRE TRUNK, TAILGATE, FUEL DOORS SYSTEM ANTI-THEFT SYSTEM TRUNK, TAILGATE, FUEL DOORS SYSTEM DOOR LOCKS SYSTEM WHT WIRE YEL WIRE YEL/BLK WIRE

39 27 34 COMP CONTROL A/C PRESS SIGNAL 80 59 LOW REFERENCE SERIAL DATA A/C CMPR RELAY A/C COMPRESSOR CLUTCH A/C COMPRESSOR CLUTCH DIODE (LOWER LEFT SIDE OF ENGINE, AT A/C COMPRESSOR) A/C REFRIGERANT PRESSURE SENSOR (ON LEFT SIDE OF ENGINE COMPT, ON LIQUID LINE) A/C RLY (CMPR) FUSE A/C RLY (COIL) FUSE BLK WIRE COMPUTER DATA LINES SYSTEM DK GRN WIRE DK GRN/WHT WIRE GRY WIRE HOT AT ALL TIMES HOT IN RUN NCA WIRE ORG/ WIRE PNK WIRE POWER DISTRIBUTION SYSTEM POWERTRAIN CONTROL MODULE (PCM) (IN AIR CLEANER BOX) RED/BLK WIRE UNDERHOOD JUNCTION BLOCK (BOTTOM) (ON FRONT OF RIGHT STRUT TOWER) UNDERHOOD JUNCTION BLOCK (TOP) (ON FRONT OF RIGHT STRUT TOWER)

55 72 64 VEHICLE SPEED OUT DISABLE OUTPUT VSS HIGH A/C-CRUISE FUSE ANTI-LOCK BRAKES SYSTEM BEHIND ACCESS PANEL) BLK WIRE BLK/WHT WIRE BODY CONTROL MODULE (BCM) (BEHIND LEFT SIDE OF DASH, ABOVE PARKING BRAKE LEVER) BRK SW FUSE BRN WIRE COMPUTER DATA LINES SYSTEM CRUISE CONTROL MODULE (CCM) (ON LEFT STRUT TOWER) CRUISE CONTROL ON/OFF SWITCH CRUISE CONTROL RELEASE SWITCH (BEHIND LEFT SIDE OF DASH, ON BRAKE PEDAL SUPPORT) CRUISE FUSE CRUISE IND DK BLU WIRE DK GRN WIRE ENGAGED INPUT GRY WIRE GRY/BLK WIRE HOT AT ALL TIMES HOT IN RUN INFLATABLE RESTRAINT STEERING WHEEL MODULE COIL INSTRUMENT PANEL CLUSTER (IPC) LEFT I/P JUNCTION BLOCK (LEFT SIDE OF DASH, BEHIND ACCESS PANEL) LEFT STEERING WHEEL CONTROLS LOGIC NCA WIRE ORG/ WIRE POWER DISTRIBUTION SYSTEM POWERTRAIN CONTROL MODULE (PCM) (IN AIR CLEANER BOX) PPL PPL VSS LOW RESUME/ ACCEL SWITCH RIGHT I/P JUNCTION BLOCK (RIGHT SIDE OF DASH, RIGHT STEERING WHEEL CONTROLS SERIAL DATA SET/ COAST SWITCH STOPLAMP SWITCH (ON BRAKE PEDAL SUPPORT) TURN SIGNAL/ MULTIFUNCTION SWITCH (IN STEERING COLUMN) VEHICLE SPEED SENSOR (VSS) (ON RIGHT REAR OF ENGINE COMPT, END OF TRANSAXLE) WHT WIRE YEL 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) 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

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

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

1 2 8 AUD SIGNAL AUD OUT- DRAIN WIRE 368 367 372 372 SATELLITE RADIO CIRCUIT ANT ANT ENABLE ILLUM GROUND AMP SIG ANTENNA ENABLE SIG AUDIO AMPLIFIER (IN LUGGAGE COMPT, BENEATH CENTER OF REAR PACKAGE SHELF) BARE BEHIND ACCESS PANEL) BLK WIRE BLK/WHT WIRE BREAKOUT) BRN WIRE COMPUTER DATA LINES SYSTEM DASH, BEHIND ACCESS PANEL) DATA DEFOG GRID DK BLU WIRE DK BLU/WHT WIRE DK GRN WIRE DK GRN/WHT WIRE GRN WIRE GROUND GRY WIRE HOT AT ALL TIMES HOT W/ REAR DEFOG ON LEFT I/P JUNCTION BLOCK (LEFT SIDE OF DASH, LEFT I/P JUNCTION BLOCK (LEFT SIDE OF DASH, BEHIND ACCESS PANEL) LF SPKR OUT+ LF TWET SPKR OUT+ LR SPKR LR SPKR RF SPKR RF SPKR LR SPKR OUT+ LT BLU WIRE LT BLU/BLK WIRE LT GRN WIRE LT GRN/BLK WIRE MONTE CARLO NCA WIRE ORG/ WIRE PNK 6 7 8 WIRE PNK REMOTE OUT REMOTE LF SPKR LF SPKR RR SPKR RR SPKR GROUND BATT WIRE PNK/BLK WIRE PPL RADIO RADIO ANTENNA MODULE (ON UPPER PORTION OF LEFT "C" PILLAR) RADIO FUSE REAR DEFOG CIRCUIT BREAKER REAR WINDOW RED WIRE RF SPKR OUT+ RF TWET SPKR OUT+ RIGHT AUX LEFT AUX COMMON AUDIO OUT- AUDIO SIGNAL RIGHT I/P JUNCTION BLOCK (RIGHT SIDE OF RIGHT I/P JUNCTION BLOCK (RIGHT SIDE OF DASH, BEHIND ACCESS PANEL) RIGHT I/P JUNCTION BLOCK (RIGHT SIDE OF DASH, BEHIND BARE ACCESS PANEL) RR SPKR OUT+ TAN WIRE WHT WIRE YEL WIRE

1 2 8 AUD SIGNAL AUD OUT- DRAIN WIRE ANT ENABLE ILLUM GROUND BARE BLK WIRE BLK/WHT WIRE BRN WIRE COMPUTER DATA LINES SYSTEM DATA DEFOG GRID DK BLU WIRE DK GRN WIRE DK GRN/WHT WIRE GRY WIRE HOT AT ALL TIMES HOT W/ REAR DEFOG ON LEFT FRONT DOOR SPEAKER LEFT RADIO STEERING WHEEL CONTROLS LEFT REAR SPEAKER LR SPKR LR SPKR RF SPKR RF SPKR LT BLU WIRE LT GRN WIRE MODE MUTE NCA WIRE ORG/ WIRE PNK REMOTE OUT REMOTE LF SPKR LF SPKR RR SPKR RR SPKR GROUND BATT WIRE PNK WIRE PNK/BLK WIRE PPL PRESET RADIO RADIO ANTENNA MODULE (ON UPPER PORTION OF LEFT "C" PILLAR) RADIO FUSE REAR DEFOG CIRCUIT BREAKER REAR WINDOW ANT RIGHT AUX LEFT AUX COMMON AUD OUT- AUD SIGNAL RIGHT FRONT DOOR SPEAKER RIGHT I/P JUNCTION BLOCK (RIGHT SIDE OF DASH, BEHIND ACCESS PANEL) RIGHT RADIO STEERING WHEEL CONTROLS RIGHT REAR SPEAKER SATELLITE RADIO CIRCUIT SEEK DN SEEK TYPE SEEK UP STEERING WHEEL CONTROLS TAN WIRE VOL DN VOL UP WHT WIRE YEL WIRE

1 2 8 AUD SIGNAL AUD OUT- DRAIN WIRE 199 116 117 200 NOT USED 368 367 372 372 SATELLITE RADIO CIRCUIT ANT ANT ENABLE ILLUM GROUND BARE BLK WIRE BLK/WHT WIRE BLUNT CUT) BRN WIRE COMPUTER DATA LINES SYSTEM DATA DEFOG GRID DK BLU WIRE DK GRN WIRE DK GRN/WHT WIRE GRN WIRE GRY WIRE HOT AT ALL TIMES HOT W/ REAR DEFOG ON LEFT FRONT DOOR SPEAKER LEFT RADIO STEERING WHEEL CONTROLS LEFT REAR SPEAKER LR SPKR LR SPKR RF SPKR RF SPKR LT BLU WIRE LT GRN WIRE MODE MUTE NCA WIRE NOT USED ORG/ WIRE PNK REMOTE OUT REMOTE LF SPKR LF SPKR RR SPKR RR SPKR GROUND BATT WIRE PNK WIRE PNK/BLK WIRE PRESET RADIO RADIO ANTENNA MODULE (ON UPPER PORTION OF LEFT "C" PILLAR) RADIO FUSE REAR DEFOG CIRCUIT BREAKER REAR WINDOW RIGHT AUX LEFT AUX COMMON AUD OUT- AUD SIGNAL RIGHT FRONT DOOR SPEAKER RIGHT I/P JUNCTION BLOCK (RIGHT SIDE OF DASH, BEHIND ACCESS PANEL) RIGHT RADIO STEERING RIGHT REAR SPEAKER SEEK DN SEEK TYPE SEEK UP STEERING WHEEL CONTROLS TAN WIRE VOL DN VOL UP WHEEL CONTROLS WHT WIRE YEL WIRE