Audi A4 B5 facelift (1999-2001) red/brn Wiring diagrams

* - INFORMATION NOT AVAILABLE 8-WAY RELAY CARRIER ABS CONTROL MODULE ABS RETURN FLOW PUMP ABS RETURN FLOW PUMP RELAY ABS SOLENOID VALVE RELAY ABS/EDL HYDRAULIC UNIT (BELOW LEFT SIDE OF REAR SEAT) ANTI-SLIP CONTROL SWITCH BLK WIRE BLK/BLU WIRE BLK/GRN WIRE BRAKE LIGHT SWITCH BRN WIRE BRN/GRN WIRE BRN/RED WIRE COMBINATION PROCESSOR DATA LINK CONNECTOR (UNDER LEFT SIDE OF DASH) FUSE 13 FUSE 53 FUSE 7 FUSE PANEL FWD ONLY GRN WIRE GRN/BLK WIRE GRN/BLU WIRE GRN/BRN WIRE GRN/RED WIRE GRY/BLU WIRE HOT AT ALL TIMES HOT IN ON OR START INSTRUMENT CLUSTER LEFT FRONT ABS INLET VALVE LEFT FRONT ABS OUTLET VALVE LEFT FRONT ABS WHEEL SPEED SENSOR LEFT FRONT BRAKE PAD WEAR SENSOR LEFT FRONT TRACTION CONTROL OUTLET VALVE LEFT FRONT TRACTION CONTROL SWITCH-OVER VALVE LEFT REAR ABS INLET VALVE LEFT REAR ABS OUTLET VALVE LEFT REAR ABS WHEEL SPEED SENSOR MOTRONIC ENGINE CONTROL MODULE (NEAR BRAKE BOOSTER IN PROTECTIVE CASE) RED WIRE RED/BLK WIRE RED/BRN WIRE RED/YEL WIRE RIGHT FRONT ABS INLET VALVE RIGHT FRONT ABS OUTLET VALVE RIGHT FRONT ABS WHEEL SPEED SENSOR RIGHT FRONT BRAKE PAD WEAR SENSOR RIGHT FRONT TRACTION CONTROL OUTLET VALVE RIGHT FRONT TRACTION CONTROL SWITCH-OVER VALVE RIGHT REAR ABS INLET VALVE RIGHT REAR ABS OUTLET VALVE RIGHT REAR ABS WHEEL SPEED SENSOR TRACTION CONTROL IND TRANSMISSION CONTROL MODULE (UNDER CARPET, FORWARD OF PASSENGER'S SEAT) VIO/BLK WIRE W/ ANTI-SLIP CONTROL W/ ANTI-SLIP CONTROL OR QUATTRO W/ ANTI-SLIP CONTROL FWD ONLY W/ ANTI-SLIP CONTROL W/ ANTI-SLIP CONTROL WHT WIRE WHT/BLK WIRE WHT/BRN WIRE YEL WIRE YEL/BLU WIRE YEL/RED WIRE

ALARM HORN ANTENNA AVANT BLK WIRE BLK/BLU WIRE BLK/GRN WIRE BLK/RED WIRE BLK/WHT WIRE BLK/YEL WIRE BLU WIRE BLU/RED WIRE BRN WIRE BRN/BLU WIRE BRN/GRN WIRE BRN/GRY WIRE BRN/WHT (OR BRN/BLK) WIRE BRN/WHT WIRE BRN/YEL WIRE CLUTCH PEDAL POSITION SWITCH (M/T) DOOR LOCK SWITCH EXTERIOR LIGHTS SYSTEM EXTERIOR LIGHTS SYSTEM FUSE FUSE PANEL (ON LEFT END OF DASH) FUSE GRN WIRE GRN/BLU WIRE GRN/RED WIRE GRN/YEL WIRE GRY/WHT WIRE GRY/YEL WIRE HOT AT ALL TIMES HOT IN START, RUN IGNITION SWITCH INSTRUMENT CLUSTER KEY SWITCH LEFT DOOR WARNING LIGHT LUGGAGE COMPT LIGHT MULTI- FUNCTION TRANSMISSION SWITCH (A/T) NCA WIRE PARK/ NEUTRAL POSITION RELAY POWER WINDOWS SYSTEM POWER WINDOWS SYSTEM INTERIOR LIGHTS SYSTEM RADIO RED WIRE RED/BLK WIRE RED/BLU WIRE RED/BRN WIRE RED/GRY WIRE RED/VIO WIRE RED/WHT WIRE RIGHT DOOR WARNING LIGHT TAILGATE RELEASE SYSTEMS TRUNK LID ALARM SWITCH TRUNK LID RELEASE SWITCH VIO/BLU WIRE WARNING LIGHT CONTROL MODULE WHT WIRE WHT/BLU WIRE WITH REMOTE CONTROL YEL WIRE YEL/BLU WIRE YEL/RED WIRE

AUTO CHECK SYSTEM (PART OF INSTRUMENT CLUSTER) BLK WIRE BLK/RED WIRE BLU/RED WIRE BRN WIRE BRN/BLK WIRE BRN/GRN WIRE BRN/WHT WIRE BRN/YEL WIRE DRIVER'S DOOR CONTACT SWITCH DRIVER'S DOOR HANDLE ALARM SWITCH GRN WIRE GRN/BLU WIRE GRN/RED WIRE GRN/YEL WIRE GRY WIRE GRY/WHT WIRE GRY/YEL WIRE HOOD ALARM SWITCH INSTRUMENT CLUSTER SYSTEM INTERIOR MONITOR SWITCH LEFT REAR BROKEN GLASS SENSOR LEFT REAR DOOR CONTACT SWITCH LEFT ULTRA- SOUND SENSOR PASSENGER'S DOOR CONTACT SWITCH PASSENGER'S DOOR HANDLE ALARM SWITCH REAR WINDOW DEFOGGER RED WIRE RED/BLU WIRE RED/BRN WIRE RIGHT REAR BROKEN GLASS SENSOR RIGHT REAR DOOR CONTACT SWITCH RIGHT ULTRA- SOUND SENSOR TRUNK LOCK ALARM SWITCH ULTRA SOUND SENSOR CONTROL MODULE (BELOW CENTER OF REAR SEAT) VIO WIRE W/ AUTO CHECK SYSTEM W/O AUTO CHECK SYSTEM WHT WIRE YEL WIRE

AUTO CHECK SYSTEM BLK WIRE BLK/RED WIRE BLU WIRE BLU/YEL WIRE BOARD COMPUTER FUNCTION SELECTOR SWITCH BRAKE- LIGHT SWITCH (ABOVE BRAKE PEDAL, ABOVE BRACKET) BRN WIRE BRN/GRN WIRE BRN/RED WIRE BRN/VIO WIRE BRN/WHT WIRE FUSE 13 FUSE 5 FUSE PANEL GRN WIRE GRN/GRY WIRE GRN/VIO WIRE GRY WIRE GRY/BLK WIRE GRY/BLU WIRE GRY/RED WIRE GRY/WHT WIRE GRY/YEL WIRE HEADLIGHTS SYSTEM HOT AT ALL TIMES HOT IN START OR RUN INSTRUMENT CLUSTER LEFT REAR DOOR CONTACT SWITCH NAVIGATION CONTROL MODULE PASSENGER'S SIDE DOOR CONTACT SWITCH RADIO REAR LIGHT CONTROL MODULE (ON 13-FOLD RELAY CARRIER, POSITIONS 4, 5) RED WIRE RED/BLK WIRE RED/BRN WIRE RED/VIO WIRE RED/WHT WIRE RED/YEL WIRE RIGHT REAR DOOR CONTACT SWITCH TRIP COMPUTER FUNCTION SELECT SWITCH TRIP COMPUTER RESET BUTTON WASHER FLUID LEVEL WARNING SWITCH WHT/BRN WIRE YEL WIRE YEL/BLK WIRE YEL/BRN WIRE YEL/GRN WIRE YEL/WHT WIRE

A/C CONTROL HEAD ABS CONTROL MODULE (LEFT FRONT CORNER OF ENG COMPT) AIR BAG ABS WARNING MIL AIR BAG CTRL MODULE ANTI- THEFT WARN OIL PRESS WARN BLK WIRE BLK/BRN WIRE BLK/GRN WIRE BLK/WHT WIRE BLU WIRE BLU/BRN WIRE BLU/VIO WIRE BLU/YEL WIRE BRAKE FLUID LEVEL WARNING SWITCH BRAKE PAD WEAR IND SEAT BELT IND BRAKE SYSTEM WARN WASHER FLUID LEVEL BRN WIRE BRN/BLU WIRE BRN/GRN WIRE BRN/RED WIRE BRN/WHT WIRE BRN/YEL WIRE COMPUTER DATA LINES SYSTEM COOLANT FUEL RESERVE WARN LEVEL/ TEMP WARN DRIVER'S SEAT BELT SWITCH ECT GAUGE EMERGENCY FLASHER RELAY ENGINE COOLANT LEVEL WARNING ENGINE COOLANT TEMPERATURE SENSOR FUEL GAUGE CLOCK FUEL LEVEL SENSOR FUSE 15 FUSE 18 FUSE 5 FUSE PANEL GEN WARN IND GENERATOR GRN WIRE GRN/BLK WIRE GRN/BLU WIRE GRN/RED WIRE GRY WIRE GRY/BLU WIRE GRY/YEL WIRE HEADLIGHT LEVELING CONTROL MODULE HEADLIGHTS SYSTEM HIGH BEAM IND HOT AT ALL TIMES HOT AT ALL TIMES IGNITION SWITCH HOT IN RUN OR START HOT WITH HIGH BEAMS ON IGNITION SWITCH INSTRUMENT CLUSTER KEY SWITCH LEFT FRONT BRAKE PAD WEAR SENSOR LEFT TURN IND LOCK OFF MIL INDICATOR MOTRONIC ENGINE CONTROL MODULE (NEAR BRAKE BOOSTER) NAVIGATION CONTROL MODULE OIL LEVEL THERMAL SENSOR OIL TEMP GAUGE PANEL DIMMER PARK BRAKE IND PARK BRAKE SWITCH PARK LIGHT IND ANTI-THEFT IMOBILIZER IND PWR ACCEL WARN IND RADIO RED WIRE RED/BLK WIRE RED/BLU WIRE RED/BRN WIRE RIGHT FRONT BRAKE PAD WEAR SENSOR RIGHT HIGH BEAM HEADLIGHT RIGHT TURN IND RUN WIRE SPEEDOMETER SWITCH (BOTTOM OF RESERVOIR) TACHOMETER TRACTION CONT IND TRAILER OPERATION IND TRANSMISSION CONTROL MODULE TURN SIGNAL SWITCH VEHICLE SPEED SENSOR VIO WIRE VIO/BLK WIRE VOLTS METER W/ ASC WARNING BUZZER WHT WIRE WHT/BLU WIRE WHT/GRY WIRE WHT/YEL WIRE WIPER/WASHER INTERMITTENT RELAY (CENTRAL ELECTRIC PANEL) YEL WIRE YEL/BRN WIRE YEL/RED WIRE

AUTO CHECK SYSTEM BLK WIRE BLK/RED WIRE BLU WIRE BLU/RED WIRE BLU/YEL WIRE BOARD COMPUTER FUNCTION SELECTOR SWITCH BRN WIRE COMBINATION PROCESSOR COMPUTER DATA LINES SYSTEM FUSE 15 FUSE 31 FUSE 5 FUSE PANEL GRN WIRE GRN/BLU WIRE GRN/BRN WIRE GRN/GRY WIRE GRN/VIO WIRE GRN/WHT WIRE GRY WIRE GRY/BLU WIRE HOT AT ALL TIMES HOT IN RUN OR START INSTRUMENT CLUSTER M/T A/T NAVIGATION CONTROL MODULE NAVIGATION SYSTEM ANTENNA NCA WIRE RADIO RED WIRE RED/BLK WIRE RED/BLU WIRE RED/BRN WIRE RED/GRN WIRE RED/VIO WIRE TELEPHONE TRANSCEIVER VIO/GRY WIRE WHT WIRE WHT/BLU WIRE WHT/BRN WIRE

3-WAY RELAY CARRIER A/C SYSTEM ABS SYSTEM, TRANSMISSIONS SYSTEM, INSTRUMENT CLUSTER SYSTEM BLK WIRE BLK/BLU WIRE BLK/GRN WIRE BLK/GRY WIRE BLK/VIO WIRE BLK/WHT WIRE BLK/YEL WIRE BLU/GRY WIRE BRAKE LIGHT SWITCH (ABOVE BRAKE PEDAL, ON BRACKET) BRN WIRE BRN/GRN WIRE BRN/RED WIRE CLUTCH VACUUM VENT VALVE SWITCH (ABOVE CLUTCH, ON BRACKET) CRUISE CONTROL SYSTEM FUSE 13 FUSE 130 FUSE 7 FUSE PANEL GRN WIRE GRN/BLK WIRE GRN/BLU WIRE GRN/RED WIRE GRN/YEL WIRE GRY WIRE GRY/YEL WIRE GYR/YEL WIRE HEATED OXYGEN SENSOR 1 (RIGHT SIDE OF ENG, ON EXHAUST MANIFOLD) HEATED OXYGEN SENSOR 2 (BEHIND 3-WAY CATALYTIC CONVERTER) HOT AT ALL TIMES HOT IN START OR RUN M/T MASS AIRFLOW (MAF) SENSOR (INSIDE AIR CLEANER HOUSING) MICRO CENTER ELECTRONIC SECONDARY AIR INJECTION (AIR) PUMP RELAY MOTRONIC ENGINE CONTROL MODULE (NEAR BRAKE BOOSTER IN PROTECTIVE CASE) NCA WIRE RED WIRE RED/BLK WIRE RED/BRN WIRE RED/GRN WIRE RED/WHT WIRE RED/YEL WIRE SECONDARY AIR INJECTION PUMP MOTOR (LOWER RIGHT FRONT CORNER OF ENG COMPT) THROTTLE POSITION (TP) SENSOR (ON THROTTLE BODY) VIO WIRE WHT WIRE WHT/BLK WIRE WHT/BLU WIRE WHT/GRY WIRE WHT/RED WIRE YEL WIRE YEL/BLU WIRE YEL/BRN WIRE YEL/GRN WIRE YEL/RED WIRE YEL/VIO WIRE

BLK WIRE BLK/RED WIRE BLU WIRE BLU/GRY WIRE BRN WIRE BRN/BLK WIRE BRN/GRY WIRE CHARGE AIR PRESSURE SENSOR ENGINE COOLANT TEMPERATURE (ECT) SENSOR (REAR OF CYLINDER, ON COOLANT FLANGE) ENGINE SPEED (RPM) SENSOR (LEFT SIDE OF ENG, NEAR OIL FILTER) FUSE 229 FUSE PANEL GRN WIRE GRN/BLU WIRE GRN/GRY WIRE GRN/RED WIRE GRN/YEL WIRE GRY WIRE GRY/BLU WIRE IDLE AIR CONTROL CUT-OFF VALVE INSTRUMENT CLUSTER INTAKE AIR TEMPERATURE SENSOR (ON INTAKE MANIFOLD) KNOCK SENSOR (KS) 1 (LEFT FRONT OF ENG BLOCK) KNOCK SENSOR (KS) 2 (LEFT REAR OF ENG BLOCK) LEAK DETECTION PUMP (LDP) (INSIDE RIGHT REAR WHEELHOUSING) MALFUNCTION INDICATOR LAMP MOTRONIC ENGINE CONTROL MODULE POWER SUPPLY NCA WIRE RED WIRE RED/BRN WIRE RED/GRN WIRE RED/GRY WIRE VIO WIRE WHT WIRE WHT/BLK WIRE WHT/BLU WIRE WHT/GRY WIRE WHT/YEL WIRE YEL WIRE YEL/BRN WIRE YEL/GRN WIRE YEL/RED WIRE YEL/VIO WIRE YEL/WHT WIRE

A/C SYSTEM BACK-UP LIGHT SWITCH BLK WIRE BLK/BLU WIRE BLK/GRY WIRE BLK/VIO WIRE BLK/WHT WIRE BLK/YEL WIRE BLU WIRE BLU/GRN WIRE BLU/GRY WIRE BRAKE LIGHT SWITCH (ABOVE BRAKE PEDAL, ON BRACKET) BRN WIRE BRN/BLK WIRE BRN/GRN WIRE BRN/RED WIRE CLUTCH VACUUM VENT VALVE SWITCH (ABOVE CLUTCH PEDAL, ON BRACKET) CRUISE CONTROL SYSTEM FUSE 13 FUSE 7 FUSE PANEL FUSE 231 GRN WIRE GRN/BLK WIRE GRN/BLU WIRE GRN/RED WIRE GRN/YEL WIRE GRY WIRE GRY/YEL WIRE GYR/YEL WIRE HEATED OXYGEN SENSOR 1 (BEHIND RIGHT CYLINDER HEAD, ON EXHAUST MANIFOLD) HEATED OXYGEN SENSOR 2 (BEHIND RIGHT CYLINDER HEAD, ON EXHAUST MANIFOLD) HOT AT ALL TIMES IGNITION SWITCH INSTRUMENT CLUSTER SYSTEM M/T MASS AIRFLOW (MAF) SENSOR (IN AIR CLEANER ASSEMBLY) MOTRONIC ENGINE CONTROL MODULE (NEAR BRAKE BOOSTER IN PROTECTIVE CASE) NCA WIRE OFF OXYGEN SENSOR 1 (BEHIND 3-WAY CATALYTIC CONVERTER) OXYGEN SENSOR 2 (BEHIND 3-WAY CATALYTIC CONVERTER) RED WIRE RED/BLK WIRE RED/BRN WIRE RED/GRN WIRE RED/WHT WIRE RED/YEL WIRE RUN WIRE THROTTLE POSITION (TP) SENSOR (ON THROTTLE BODY) VIO WIRE WHT WIRE WHT/BLU WIRE WHT/RED WIRE YEL WIRE YEL/BLU WIRE YEL/BRN WIRE YEL/GRN WIRE YEL/RED WIRE YEL/VIO WIRE

3-WAY RELAY CARRIER BLK WIRE BLK/BLU WIRE BLK/VIO WIRE BLU WIRE BLU/GRY WIRE BRN WIRE BRN/BLK WIRE BRN/GRY WIRE ENGINE SPEED (RPM) SENSOR (LEFT SIDE OF TRANSMISSION BELL HOUSING) FUSE 130 GRN WIRE GRN/BLU WIRE GRN/BRN WIRE GRN/RED WIRE GRN/YEL WIRE GRY WIRE GRY/WHT WIRE HOT AT ALL TIMES INSTRUMENT CLUSTER INSTRUMENT CLUSTER COMBINATION PROCESSOR KNOCK SENSOR (KS) 1 (ON RIGHT SIDE OF ENG BLOCK, UNDER INTAKE MANIFOLD) KNOCK SENSOR (KS) 2 (ON LEFT SIDE OF ENG BLOCK, UNDER INTAKE MANIFOLD) LEAK DETECTION PUMP (LDP) (IN RIGHT REAR WHEELHOUSING, ABOVE PLASTIC LINER) MALFUNCTION INDICATOR LAMP (MIL) NCA WIRE PWR ACCEL ACTIVATION FAULT IND RED WIRE RED/BLK WIRE RED/BRN WIRE RED/GRN WIRE SECONDARY AIR INJECTION (AIR) PUMP RELAY VIO WIRE WHT WIRE WHT/BLU WIRE WHT/YEL WIRE YEL WIRE YEL/BRN WIRE YEL/GRN WIRE YEL/RED WIRE YEL/VIO WIRE YEL/WHT WIRE