Volkswagen Golf Mk3 (1991-2000) nca Wiring diagrams

ABS CONTROL MODULE W/ EDL (LEFT SIDE OF ENG COMPT) ABS FUSE HOLDER (LEFT SIDE OF ENGINE COMPARTMENT) ABS HYDRAULIC PUMP ABS WARNING LIGHT BLK WIRE BLK/RED WIRE BLK/YEL WIRE BLU WIRE BLU/BRN WIRE BRAKE FLUID LEVEL SWITCH BRN WIRE BRN/WHT WIRE DATA LINK CONNECTOR (ABOVE FUSE/ RELAY PANEL) DIFFERENTIAL LOCK VALVE 1 DIFFERENTIAL LOCK VALVE 2 FUSE 1 FUSE 2 FUSE 20 FUSE 4 FUSE/ RELAY BOX FUSE/ RELAY BOX FUSE 16 GRY WIRE GRY/WHT WIRE HOT AT ALL TIMES HOT IN RUN OR START HOT W/ UNLOADER RELAY ENERGIZED LEFT FRONT ABS INLET VALVE LEFT FRONT ABS OUTLET VALVE LEFT FRONT ABS WHEEL SPEED SENSOR LEFT REAR ABS INLET VALVE LEFT REAR ABS OUTLET VALVE LEFT REAR ABS WHEEL SPEED SENSOR NCA WIRE RED WIRE RED/BLK WIRE RED/YEL WIRE RIGHT FRONT ABS INLET VALVE RIGHT FRONT ABS OUTLET VALVE RIGHT FRONT ABS WHEEL SPEED SENSOR RIGHT REAR ABS INLET VALVE RIGHT REAR ABS OUTLET VALVE RIGHT REAR ABS WHEEL SPEED SENSOR STOP LIGHT SWITCH WHT WIRE YEL/RED WIRE

ALARM HORN (IN FRESH AIR PLENUM, BEHIND WINDSHIELD WIPER MOTOR) ALARM SYSTEM CONTROL MODULE (BEHIND LEFT SIDE OF DASH) BATTERY BLK WIRE BLK/GRN WIRE BLK/WHT WIRE BLK/YEL WIRE BLU WIRE BRN WIRE BRN/BLK (OR BRN/WHT) WIRE BRN/BLU WIRE BRN/RED WIRE BRN/WHT WIRE D/8 DOOR LOCKS SYSTEM DRIVER'S CENTRAL LOCKING SYSTEM DOOR SWITCH FUSE/ RELAY PANEL (UNDER LEFT SIDE OF DASH) GRN WIRE GRY WIRE HOOD ALARM SWITCH (ON LEFT SIDE OF ENGINE COMPT) HOT AT ALL TIMES IGNITION SWITCH JUNCTION CONNECTOR (BEHIND FUSE/RELAY PANEL) LEFT FRONT DOOR CONTACT SWITCH LEFT REAR DOOR CONTACT SWITCH LEFT TURN SIGNAL LAMPS LOCK LUGGAGE COMPARTMENT LID ALARM SWITCH LUGGAGE COMPARTMENT LIGHT SWITCH NCA WIRE NOT USED PASSENGER'S CENTRAL LOCKING SYSTEM DOOR SWITCH POWER SUNROOF CONTROL MODULE (ABOVE HEADLINER, NEAR SUNROOF CONTROLS) POWER WINDOWS, DOOR LOCKS SYSTEMS RADIO RED WIRE RED/BLK (OR GRN) WIRE RED/BLK (OR GRY) WIRE RED/BLK (OR RED) WIRE RED/GRY (OR RED/GRN) WIRE RED/WHT (OR BRN/YEL) WIRE RED/WHT WIRE RIGHT FRONT DOOR CONTACT SWITCH RIGHT REAR DOOR CONTACT SWITCH RIGHT TURN SIGNAL LAMPS STARTING/ CHARGING SYSTEM WHT WIRE Y/3 YEL WIRE YEL/RED (OR GRY) WIRE

13/1 2/31 TO CENTER REAR ASHTRAY LIGHT (DIAGRAM 2 OF 4) 5/31 9/31 A/C SHUTOFF RELAY A/C SWITCH GLOVE COMPART- MENT LIGHT ABS WARNING LIGHT AIRBAG MALFUNCTION INDICATOR LAMP ASHTRAY LIGHT DATA LINK CONNECTOR BATTERY BLK WIRE BODY BRN WIRE CIGARETTE LIGHTER DAYTIME RUNNING LIGHTS SWITCH-ON RELAY DOOR LOCK SWITCH (CABRIO) DUAL HORN RELAY EMERGENCY FLASHER RELAY F/4 F/8 FOG LIGHT RELAY FRESH AIR CONTROL LEVER LIGHT FUEL CUT- OFF VALVE/ SHUT OFF RELAY FUEL PUMP FUSE/ RELAY PANEL (UNDER LEFT SIDE OF DASH) HEADLIGHT SWITCH INSTRUMENT CLUSTER L/1 LEFT BRAKE PAD WEAR INDICATOR LOAD REDUCTION RELAY LUGGAGE COMPARTMENT RELEASE SWITCH M/1 N/2 NCA WIRE P/5 K/11 PARKING BRAKE WARNING LIGHT SWITCH POWER SUPPLY RELAY (1.9L) Q/1 R/8 REAR WINDOW DEFOGGER SWITCH REAR WINDOW WIPER/ WASHER RELAY RED WIRE RIGHT BRAKE PAD WEAR INDICATOR RIGHT WASHER NOZZLE HEATER LEFT WASHER NOZZLE HEATER S/3 SEAT BELT WARNING SYSTEM RELAY TO COOLANT FAN (DIAGRAM 4 OF 4) TO ENGINE SPEED SENSOR (DIAGRAM 3 OF 4) TRANS- MISSION WASHER/ WIPER INTERMITTENT RELAY WHT WIRE WINDSHIELD WIPER MOTOR WINDSHIELD WIPER/WASHER SWITCH, HORN SWITCH X/2

2/31 BLK WIRE BRN WIRE CABRIO ONLY CENTRAL LOCKING SYSTEM PUMP, CONTROL MODULE DIESEL DIRECT FUEL INJECTION ENGINE CONTROL MODULE DOOR LOCK SWITCH (EX CABRIO) ENGINE SPEED SENSOR FROM BATTERY (DIAGRAM 1 OF 4) FUEL LEVEL SENSOR GENERATOR GOLF, CABRIO, GTI HIGH MOUNT BRAKE LIGHT LEFT BACK-UP/ BRAKE LIGHT BULB HOLDER RIGHT BACK-UP/ BRAKE LIGHT BULB HOLDER LEFT FRONT POWER WINDOW CONTROL MODULE LEFT HEATED MIRROR LEFT LICENSE PLATE LIGHT LEFT REAR POWER WINDOW SWITCH LEFT TAILLIGHT BULB HOLDER LUGGAGE COMPARTMENT LIGHT SWITCH LUGGAGE COMPARTMENT RELEASE SOLENOID MASS AIR FLOW SENSOR NCA WIRE NEAR LEFT "B" PILLAR) NEEDLE LIFT SENSOR SHIELD POWER MIRROR SWITCH POWER WINDOW CONSOLE SWITCH ASSEMBLY REAR WINDOW DEFOGGER REAR WINDOW WIPER MOTOR RED WIRE RIGHT FRONT POWER WINDOW CONTROL MODULE RIGHT FRONT POWER WINDOW SWITCH RIGHT HEATED MIRROR RIGHT LICENSE PLATE LIGHT RIGHT REAR POWER WINDOW SWITCH RIGHT TAILLIGHT BULB HOLDER TG/2 TH/2 TJ/2 TRUNK LID ALARM SWITCH WHT WIRE YEL WIRE

1.9L 1998 ONLY 1998-99 2.0L 2.0L ONLY 2.8L 2.8L 2.0L 2.8L: IGNI- TION COIL; 2.0L: IGNI- TION COIL POWER OUT- PUT STAGE 3 1 (2.8L) (2.0L) ABS CONTROL MODULE ANTI-THEFT ENGINE DISABLE RELAY 1 AUTOMATIC TRANSMISSION CONSOLE LIGHT (W/ A/T) BLK WIRE BLK/VIO WIRE BLU WIRE BRAKE FLUID LEVEL WARNING SWITCH BRN WIRE BRN/GRN WIRE BRN/RED WIRE BRN/WHT WIRE BRN/YEL WIRE CABRIO CABRIO/GOLF/ JETTA ONLY CAMSHAFT POSITION SENSOR CONTROL MODULE WITH DISPLAY UNIT INSTRU- MENT CLUSTER CONTROL MODULE WITH DISPLAY UNIT INSTRUMENT CLUSTER COOLANT FAN COOLANT FAN (2.8L, CABRIO, W/ A/C) ENGINE COOLANT LEVEL SENSOR EX CABRIO FRESH AIR/ RECIRCU- LATING FLAP TWO- WAY VALVE (2.8L, CABRIO, W/ A/C) FRESH AIR/ RECIRCULATING FLAP TWO- WAY VALVE (W/ A/C EX 2.8L, CABRIO) FROM BATTERY (DIAGRAM 1 OF 4) FROM FUSE/RELAY PANEL (DIAGRAM 1 OF 4) FRONT SIDE MARKER LIGHTS FUEL LEVEL SENDER FUEL LEVEL SENSOR GASOLINE GLOW PLUG RELAY GRN WIRE GRY/BLU WIRE GTI ONLY HEATED OXYGEN SENSOR 1 SHIELD HEATED OXYGEN SENSOR 2 SHIELD (2.8L ONLY) HEATED OXYGEN SENSOR 2 SHIELD HOOD ALARM SWITCH ALARM HORN KICK DOWN SWITCH (W/ A/T) PARK/ NEUTRAL POSITION RELAY (W/ A/T) KNOCK SENSOR 1 SHIELDS KNOCK SENSOR 2 SHIELDS (2.8L ONLY) KNOCK SENSOR 2 (2.8 ONLY) KNOCK SENSOR 1 ENGINE SPEED SENSOR LEFT FOG LIGHT LEFT FRONT PARK/ TURN SIGNAL LIGHT LEFT HEAD LIGHT RIGHT HEAD LIGHT LEFT HEADLIGHTS LOW LOW HIGH M/6 MASS AIR FLOW SENSOR MO- TRONIC ENGINE CONTROL MODULE MOTRONIC ENGINE CONTROL MODULE MULTI- FUNCTION INDICATOR MODE SELECT SWITCH (JETTA) MULTI- FUNCTION TRANS- MISSION RANGE SWITCH (W/ A/T) NCA WIRE RED WIRE RIGHT FOG LIGHT RIGHT FRONT PARK/ TURN SIGNAL LIGHT RIGHT HEADLIGHTS RIGHT SEAT BELT MODULE (2.0L ONLY) HEATED OXYGEN SENSOR 1 SHIELD SECONDARY AIR INJECTION PUMP MOTOR SPEED- OMETER VEHICLE SPEED SENSOR (A/T ONLY) SPEED- OMETER VEHICLE SPEED SENSOR ENGINE COOLANT TEMPERATURE SENSOR TRANS- MISSION CONTROL MODULE (W/ A/T) WHT WIRE

2.8L ONLY AIRBAG MODULE INPUT BLK (OR WHT) WIRE BLK WIRE BLK/GRN (OR WHT) WIRE BLK/WHT (OR WHT) WIRE BLK/WHT WIRE BLU (OR WHT/ WIRE BLU WIRE BLU/WHT (OR WHT) WIRE BRAKE AND PARKING BRAKE BRAKE PAD WEAR BRN WIRE BRN/RED WIRE BRN/WHT (OR WHT) WIRE DIESEL DIGITAL DISPLAY ILLUMINATION DISPLAY UNIT CONTROL MODULE ENGINE COOLANT LEVEL/TEMPERATURE WARNING ENGINE COOLANT TEMPERATURE GAUGE EXTERIOR LIGHTS SYSTEM ANTI-THEFT SYSTEM FUEL GAUGE FUSE/ RELAY PANEL (UNDER LEFT SIDE OF DASH) GASOLINE GENERATOR IND GRN (OR GRN/WHT) WIRE GRN (OR WHT OR GRN/WHT) WIRE GRN WIRE GRN/WHT WIRE GRY OR WHT WIRE GRY WIRE HEADLIGHTS SYSTEM FUSE 11 FUSE 21 HI BEAM HOT AT ALL TIMES HOT WITH HEADLIGHTS ON INSTRUMENT CLUSTER INSTRUMENT CLUSTER ILLUMINATION INTERIOR LIGHTS SYSTEM (INSTRUMENT ILLUMINATION) INTERIOR LIGHTS SYSTEM (LUGGAGE COMPT LAMP) LEFT BRAKE PAD WEAR ELEMENT LEFT TURN SIGNAL LOW FUEL LEV WARNING MALFUNCTION IND GLOW PLUG IND (DIESEL) MOTRONIC ENGINE CONTROL MODULE (IN ENGINE COMPT, ON CENTER OF FRESH AIR PLENUM) MULTI- FUNCTION INDICATOR MODE SELECT SWITCH MULTI-FUNCTION INDICATOR MEMORY SWITCH NCA WIRE OIL PRESSURE WARNING REAR HATCH OR TRUNK AJAR WARNING RED WIRE RED/WHT (OR WHT) WIRE RED/WHT WIRE RIGHT BRAKE PAD WEAR ELEMENT RIGHT TURN SIGNAL SEAT BELT WARNING SPEEDOMETER STARTING/CHARGING SYSTEM (GENERATOR) SUPPLEMENTAL RESTRAINTS SYSTEM TACHOMETER TRANSMISSIONS SYSTEM V/2 V/1 V/3 V/4 VEHICLE SPEED SIGNAL CONNECTOR VIO (OR WHT OR VIO/WHT) WIRE VIO WIRE VIO/WHT WIRE W/ A/T W/1 WARNING SYSTEM WHT WIRE YEL (OR WHT) WIRE YEL WIRE YEL/RED (OR WHT) WIRE

2/- A/C SWITCH ASHTRAY LIGHT AUTOMATIC TRANSMISSION CONSOLE LIGHT BATTERY BLK WIRE BLK/RED WIRE BLK/YEL WIRE BLU WIRE BRN WIRE BRN/BLK WIRE CENTER REAR ASHTRAY LIGHT D/12 D/9 DIMMER SWITCH DOOR LOCK/UNLOCK SWITCH FRESH AIR CONTROL LEVER LIGHT FUSE 14 FUSE 3 FUSE/ RELAY PANEL (UNDER LEFT SIDE OF DASH) GRN WIRE GRY WIRE GRY/BLK WIRE GRY/BLU WIRE GRY/GRN WIRE HEADLIGHT SWITCH HOT IN ON OR START ILLUMINATION INSTRUMENT CLUSTER J/C K/5 LEFT FRONT POWER WINDOW SWITCH LEFT REAR POWER WINDOW MODULE LEFT REAR POWER WINDOW SWITCH MIRROR ADJUSTMENT SWITCH NCA WIRE OFF PARK HEAD P/5 P/7 P/9 POWER WINDOW CONSOLE SWITCH ASSEMBLY POWER WINDOWS SYSTEM Q/1 Q/6 R/2 R/4 R/5 R/8 RADIO REAR WINDOW DEFOGGER SWITCH RED WIRE RED/YEL WIRE RIGHT FRONT POWER WINDOW SWITCH RIGHT REAR POWER WINDOW MODULE RIGHT REAR POWER WINDOW SWITCH SEAT HEATER SWITCH WHT WIRE Y/3 YEL WIRE

ALARM SYSTEM CONTROL MODULE (BEHIND LEFT SIDE OF DASH) ANTI-THEFT SYSTEM (ALARM SYSTEM INDICATOR LIGHT) BLK WIRE BRN WIRE DOOR LOCK SWITCH DRIVER'S DOOR CENTRAL LOCKING SYSTEM DOOR SWITCH FUSE 21 FUSE 22 FUSE/ RELAY PANEL (UNDER LEFT SIDE OF DASH) GRN WIRE GRY WIRE GRY/BLU WIRE GRY/GRN WIRE HOT AT ALL TIMES ILLUM L/7 Q/5 NCA WIRE PASSENGER'S DOOR CENTRAL LOCKING SYSTEM DOOR SWITCH POWER TOPS SYSTEM (RIGHT SIDE OF LUGGAGE COMPT) PUMP MOTOR RED WIRE RED/BLK WIRE RED/GRN WIRE RED/WHT WIRE TEMPORARY RESISTOR (220 OHMS) WHT WIRE

A/C CLUTCH CUT-OFF RELAY BATTERY BATTERY GROUND BLK WIRE BLK/RED WIRE BLK/YEL WIRE BLU WIRE BLU/RED WIRE BLU/WHT WIRE BRN WIRE BRN/BLK WIRE BRN/BLU WIRE BRN/WHT WIRE D/8 DATA LINK CONNECTOR (CENTER OF DASH) E/2 ENGINE SPEED SENSOR (ON CYLINDER BLOCK BEHIND OIL FILTER) FUEL PUMP FUEL PUMP RELAY FUSE 101 FUSE 15 FUSE 18 FUSE/ RELAY PANEL FUSE/RELAY PANEL GRN WIRE GRN/BLK WIRE GRN/VIO WIRE GRN/WHT WIRE GRN/YEL WIRE GRY WIRE GRY/BLU WIRE GRY/BRN WIRE GRY/GRN WIRE GRY/RED WIRE GRY/WHT WIRE IGNITION IGNITION (15) INSTRUMENT CLUSTER INSTRUMENT CLUSTER SYSTEM INSTRUMENT CLUSTER SYSTEM (CONTROL MODULE/ DISPLAY UNIT) INSTRUMENT CLUSTER VEHICLE SPEED SIGNAL JUNCTION BLOCK (ABOVE FUSE/ RELAY PANEL) JUNCTION CONNECTOR LEAK DETECTION PUMP M/1 M/2 MALFUNCTION INDICATOR LAMP MOTRONIC ENGINE CONTROL MODULE NCA WIRE RED WIRE RED/BLK WIRE RED/BLU WIRE RED/GRY WIRE RED/WHT WIRE RED/YEL WIRE SECONDARY AIR INJECTION (AIR) PUMP RELAY (CALIF. ONLY) (BEHIND LEFT HEADLIGHT) TRANSMISSION CONTROL MODULE VIO/BLK WIRE W/1 WHT WIRE WHT/GRN WIRE WHT/RED WIRE WHT/YEL WIRE YEL WIRE YEL/BLK WIRE YEL/BLU WIRE YEL/BRN WIRE YEL/RED WIRE YEL/WHT WIRE Z/2

BLK WIRE BLK/RED WIRE BLK/YEL WIRE BLU WIRE BRN WIRE BRN/BLK WIRE BRN/BLU WIRE BRN/RED WIRE BRN/WHT WIRE BRN/YEL WIRE CAMSHAFT POSITION SENSOR (IN DISTRIBUTOR HOUSING, UNDER SENSOR ROTOR) EVAPORATIVE EMISSION (EVAP) CANISTER PURGE SOLENOID VALVE FUEL CUT- OFF VALVE/ SHUT OFF RELAY FUEL INJECTORS GRN/WHT WIRE GRN/YEL WIRE GRY WIRE GRY/BLU WIRE GRY/GRN WIRE GRY/RED WIRE HEATED OXYGEN SENSOR IGNITION COIL IGNITION COIL POWER OUTPUT STAGE IGNITION DISTRIBUTOR KNOCK SENSOR (KS) (ON ENGINE BLOCK, NEAR OIL FILTER HOUSING) MASS AIR FLOW (MAF) SENSOR (IN INTAKE AIR DUCT) NCA WIRE RED/BLK WIRE RED/BLU WIRE RED/GRY WIRE RED/WHT WIRE RED/YEL WIRE SECONDARY AIR INJECTION (AIR) SOLENOID VALVE (CALIF ONLY) THROTTLE VALVE CONTROL MODULE (AT THROTTLE BODY) WHT WIRE WHT/BLK WIRE WHT/GRN WIRE WHT/RED WIRE WHT/YEL WIRE YEL WIRE YEL/BRN WIRE