Audi A4 B5 facelift (1999-2001) brake light switch 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

BLK WIRE BLK/WHT WIRE BLU WIRE BRAKE LIGHT SWITCH BRN WIRE BRN/GRN WIRE BRN/RED WIRE BRN/VIO WIRE CLUTCH VACUUM VENT VALVE SWITCH (ABOVE CLUTCH PEDAL, ON BRACKET) CRUISE CONTROL SWITCH FUSE FUSE 7 FUSE PANEL (ON LEFT END OF DASH) GRN WIRE GRN/VIO (OR BRN/RED) WIRE GRY WIRE GRY/WHT (OR GRY/BRN, OR GRN/RED) WIRE GRY/YEL WIRE HOT IN RUN OR START MOTRONIC ENGINE CONTROL MODULE (NEAR BRAKE BOOSTER IN PROTECTIVE CASE) RED WIRE RED/GRN WIRE RED/GRY WIRE RED/VIO WIRE RED/YEL WIRE THROTTLE POSITION (TP) SENSOR (ON THROTTLE BODY) THROTTLE VALVE CONTROL MODULE (ON REAR OF ENG, ON INTAKE MANIFOLD) VIO/RED (OR BLK/GRY) WIRE WHT WIRE WHT/RED WIRE WHT/YEL (OR VIO/YEL, OR BLK/BRN) WIRE YEL WIRE YEL/BLU WIRE YEL/VIO WIRE

13-WAY RELAY CARRIER (BEHIND LEFT SIDE OF DASH) 5 5 6 1 1 2 (AVANT) 6 2 (AVANT) AUTO CHECK SYSTEM (PART OF INSTRUMENT CLUSTER) AVANT BLK WIRE BLK/GRN WIRE BLK/RED WIRE BLK/YEL WIRE BLU WIRE BRAKE LIGHT SWITCH BRN WIRE COMBINATION PROCESSOR DAYTIME RUNNING LIGHTS SWITCH-ON RELAY EMERGENCY FLASHER SWITCH FUSE FUSE 2 FUSE FUSE FUSE PANEL (LEFT END OF DASH) FUSE GRN WIRE GRY WIRE GRY/BLK WIRE GRY/GRN WIRE GRY/RED WIRE GRY/WHT WIRE GRY/YEL WIRE HEAD HEAD PARK HIGH MOUNT BRAKE LIGHT HOT AT ALL TIMES HOT IN RUN OR START HOT W/ LOAD REDUCTION RELAY ENERGIZED HOT W/ LOAD REDUCTION RELAY ENERGIZED HOT AT ALL TIMES INSTRUMENT CLUSTER INSTRUMENT CLUSTER SYSTEM (WITH TRAILER OPTION) INTERIOR LIGHTS SYSTEM LEFT FRONT PARK/TURN LIGHT LEFT SIDE TURN SIGNAL LIGHT LEFT TAILLAMP ASSEMBLY 4 6 INSTRUMENT CLUSTER (AVANT) LEFT TURN IND PARK TURN LICENSE PLATE LIGHTS LIGHT SWITCH MICRO CENTRAL ELECTRIC OFF PARK REAR LIGHT CONTROL MODULE (ON 13-WAY RELAY CARRIER) RED WIRE RED/BLK WIRE RED/WHT WIRE RED/YEL WIRE RIGHT FRONT PARK/TURN LIGHT RIGHT SIDE TURN SIGNAL LIGHT RIGHT TAILLAMP ASSEMBLY 3 6 (AVANT) RIGHT TURN IND TURN TAIL STOP TAIL STOP TURN TURN PARK TURN SIGNAL SWITCH VIO WIRE WHT WIRE YEL WIRE

13-WAY RELAY CARRIER (BEHIND LEFT SIDE OF DASH) 5 5 6 1 1 2 (AVANT) 6 2 (AVANT) AVANT BLK WIRE BLK/GRN WIRE BLU WIRE BRAKE LIGHT SWITCH BRN WIRE COMBINATION PROCESSOR DAYTIME RUNNING LIGHTS SWITCH-ON RELAY EMERGENCY FLASHER SWITCH FUSE FUSE 2 FUSE FUSE FUSE PANEL (LEFT END OF DASH) FUSE PANEL (LEFT END OF DASH) FUSE GRN WIRE GRY WIRE GRY/BLK WIRE GRY/GRN WIRE GRY/RED WIRE GRY/YEL WIRE HEAD HEAD PARK HIGH MOUNT BRAKE LIGHT HOT AT ALL TIMES HOT W/ LOAD REDUCTION RELAY ENERGIZED INSTRUMENT CLUSTER INSTRUMENT CLUSTER SYSTEM (WITH TRAILER OPTION) LEFT FRONT PARK/TURN LIGHT LEFT RIGHT TURN IND TURN IND TURN LEFT SIDE TURN SIGNAL LIGHT LEFT TAILLAMP ASSEMBLY 4 6 (AVANT) LICENSE PLATE LIGHTS LIGHT SWITCH MICRO CENTRAL ELECTRIC OFF OFF PARK PARK RED WIRE RED/BLK WIRE RED/YEL WIRE RIGHT FRONT PARK/TURN LIGHT INSTRUMENT CLUSTER RIGHT SIDE TURN SIGNAL LIGHT RIGHT TAILLAMP ASSEMBLY 3 6 (AVANT) TAIL STOP TURN TURN PARK TURN SIGNAL SWITCH TURN TAIL STOP VIO WIRE VIO/BLU WIRE WHT WIRE YEL WIRE

5 5 6 1 1 2 (AVANT) 6 2 (AVANT) AUTO CHECK SYSTEM (PART OF INSTRUMENT CLUSTER) AVANT BLK WIRE BLK/GRN WIRE BLK/RED WIRE BLU WIRE BRAKE LIGHT SWITCH BRN WIRE COMBINATION PROCESSOR EMERGENCY FLASHER SWITCH FUSE FUSE 2 FUSE FUSE FUSE PANEL (LEFT END OF DASH) FUSE GRN WIRE GRY WIRE GRY/BLK WIRE GRY/GRN WIRE GRY/RED WIRE GRY/WHT WIRE GRY/YEL WIRE HEAD HEAD PARK HIGH MOUNT BRAKE LIGHT HOT AT ALL TIMES HOT AT ALL TIMES MICRO CENTRAL ELECTRIC HOT IN RUN OR START HOT W/ LOAD REDUCTION RELAY ENERGIZED INSTRUMENT CLUSTER INSTRUMENT CLUSTER SYSTEM (WITH TRAILER OPTION) LEFT FRONT PARK/TURN LIGHT LEFT SIDE TURN SIGNAL LIGHT LEFT TAILLAMP ASSEMBLY 4 6 INSTRUMENT CLUSTER (AVANT) LEFT TURN IND PARK TURN LICENSE PLATE LIGHTS LIGHT SWITCH OFF OFF PARK REAR LIGHT CONTROL MODULE (ON 13-WAY RELAY CARRIER) RED WIRE RED/BLK WIRE RED/WHT WIRE RED/YEL WIRE RIGHT FRONT PARK/TURN LIGHT RIGHT SIDE TURN SIGNAL LIGHT RIGHT TAILLAMP ASSEMBLY 3 6 (AVANT) RIGHT TURN IND TURN TAIL STOP TAIL STOP TURN TURN PARK TURN SIGNAL SWITCH VIO WIRE WHT WIRE YEL WIRE

5 5 6 1 1 2 (AVANT) 6 2 (AVANT) AVANT BLK WIRE BLK/GRN WIRE BLU WIRE BRAKE LIGHT SWITCH BRN WIRE COMBINATION PROCESSOR EMERGENCY FLASHER SWITCH FUSE FUSE 2 FUSE FUSE FUSE PANEL (LEFT END OF DASH) FUSE GRN WIRE GRY WIRE GRY/BLK WIRE GRY/GRN WIRE GRY/RED WIRE GRY/YEL WIRE HEAD HEAD PARK HIGH MOUNT BRAKE LIGHT HOT AT ALL TIMES HOT AT ALL TIMES MICRO CENTRAL ELECTRIC HOT W/ LOAD REDUCTION RELAY ENERGIZED INSTRUMENT CLUSTER INSTRUMENT CLUSTER SYSTEM (WITH TRAILER OPTION) LEFT FRONT PARK/TURN LIGHT LEFT RIGHT TURN IND TURN IND TURN LEFT SIDE TURN SIGNAL LIGHT LEFT TAILLAMP ASSEMBLY 4 6 (AVANT) LICENSE PLATE LIGHTS LIGHT SWITCH OFF OFF PARK PARK RED WIRE RED/BLK WIRE RED/YEL WIRE RIGHT FRONT PARK/TURN LIGHT INSTRUMENT CLUSTER RIGHT SIDE TURN SIGNAL LIGHT RIGHT TAILLAMP ASSEMBLY 3 6 (AVANT) TAIL STOP TURN TURN PARK TURN SIGNAL SWITCH TURN TAIL STOP VIO WIRE VIO/BLU WIRE WHT WIRE YEL WIRE

BLK WIRE BLK/BLU WIRE BLU WIRE BLU/GRY WIRE BRAKE LIGHT SWITCH BRN WIRE BRN/WHT WIRE FUSE 13 FUSE 31 FUSE PANEL (ON LEFT END OF DASH) GRN/GRY WIRE GRN/RED WIRE GRN/VIO WIRE GRN/WHT WIRE HOT AT ALL TIMES HOT IN RUN OR START MULTI-FUNCTION TRANSMISSION RANGE SWITCH RED/BLK WIRE RED/YEL WIRE SHIFT LOCK SOLENOID TRANSMISSION CONTROL MODULE (UNDER CARPET, FORWARD OF PASSENGER'S SEAT) TRANSMISSION RANGE SELECTOR LEVER DISPLAY