Volkswagen Transporter (T4; 1990 – 2003) – fuse box diagram
Year of production: 1990, 1991, 1992, 1993, 1994, 1995, 1996, 1997, 1998, 1999, 2000, 2001, 2002, 2003
Volkswagen Transporter T4 – represents the 4th generation of the legendary Transporter series. This model was produced in 1990, 1991, 1992, 1993, 1994, 1995, 1996, 1997, 1998, 1999, 2000, 2001, 2002 and 2003 with diesel and gasoline engines with different wheelbases: short and long, and with different roof height. Also on the T4, Volkswagen continued its lineup of luxury Caravelle, California and Multivan models. In this article, we will show the location of all electronic control sides and a detailed designation of the purpose of fuses and relays Volkswagen T4 with box diagrams in which they are located.
Locations
| 1 | Air conditioning control unit 1 – with automatic temperature control – in the heater control panel, front |
| 2 | Air conditioning control unit 2 – with automatic temperature control – in the heater control panel, rear – central pillar |
| 3 | Evaporator Fan Control Unit (A / C) – With Rear A / C – Behind Right Rear Trim Panel |
| 4 | Air conditioning / heater fan motor control unit 1 – with automatic temperature control – front – fan unit |
| 5 | Air conditioning / heater blower motor control unit 2- with automatic temperature control – rear- bottom of the body, in the center |
| 6 | Aerial amplifier – behind the dash, passenger side |
| 7 | Alternator resistor – near additional relays – CV / AUF, with alternator 150A / automatic transmission / automatic temperature control – behind the central part of the dashboard |
| 8 | Additional battery – under the driver’s seat |
| 9 | Accumulator battery |
| 10 | Central locking signal control unit – behind the dashboard |
| 11 | Cruise control unit (with throttle motor) – cruise control is controlled by the ECM |
| 12 | Electronic cruise control module (without throttle motor) – behind dash, passenger side |
| 13 | Diagnostic connector (DLC) – instrument panel, driver’s side |
| 14 | Diagnostic unit – 05/99 (except for AAC / ABL / AET / AES / AJA) – in the instrument cluster |
| 15 | Cooling Fan Motor Relay – Behind Left Headlight |
| 16 | Cooling Fan Motor 1/2 Resistor – Behind Left Headlight |
| 17 | Coolant heater control unit (with additional coolant heater – D3W / B4W / D4W) – in the heater – underbody, in the center |
| 18 | Coolant heater control unit (with optional coolant heater – B7W / D7W) – behind the dash, passenger side |
| 19 | Engine oil pressure warning buzzer – in instrument cluster control unit |
| 21 | Fuse / relay box, instrument cluster 1 |
| 22 | Fuse / relay box 2, dash – under dash fuse / relay box 1 |
| 23 | Fuse / relay box, dash 3 – above dash fuse / relay box 1 |
| 24 | Fuse / relay box, dash 4 – behind dash, center |
| 25 | Fuse / Relay Box, Driver’s Seat – Under Seat |
| 26 | Fuse / Relay Box, Engine Compartment – Battery Powered |
| 27 | Additional fuse (5A / 7.5A / 10A) – in the back of the audio system unit |
| 28 | Additional fuse (10A) – at the rear of the navigation system control unit |
| 29 | Headlights not switched off warning buzzer – in the instrument cluster control unit |
| 30 | Heater blower motor resistor – manual temperature control – blower unit, front |
| 31 | Horn 1/2 – behind the front bumper |
| 32 | Immobilizer control unit – behind the instrument cluster |
| 33 | Immobilizer ring antenna – near the ignition switch |
| 34 | Turn signal relay, alarm relay – in the alarm switch |
| 35 | Instrument Cluster Control Module / Digital Multifunction Display – In Instrument Cluster |
| 36 | Outside temperature sensor – behind the front bumper |
| 37 | Driver’s seat heating control unit – in the seat heating switch |
| 38 | Passenger seat heating control unit – in the seat heating switch |
| 39 | SRS control unit – under the dash, center |
| 40 | Sunroof electric control unit |
| 41 | Theme control unit – in the display of the navigation system |
| 42 | Telephone interface control unit – behind the instrument cluster |
| 43 | Electronic gearbox control unit – near the engine control unit |
| 44 | Vehicle speed sensor – gearbox |
Passenger compartment
Fuse box location
The main fuse and relay box is located under the dash on the driver’s side.
Fuse box diagram
Version 1
| № |
A |
Description |
| 1 | 10 | Left Headlight Low Beam |
| 2 | 10 | Right Headlight Low Beam |
| 3 | 10 | Instrument & License Lights |
| 4 | 15 | Rear Window Wiper/Washer, Heated Front Seats |
| 5 | 15 | Windshield Wiper/Washer, Rear Window Washer, Heated Washer Jets |
| 6 | 30 | A/C, Fresh Air Fan |
| 7 | 10 | Right Tail Light & Side Marker Light, Engine Compartment Lamp |
| 8 | 10 | Left Taillight & Side Marker Light |
| 9 | 20 | Rear Window & Mirror Heater |
| 10 | 15 | Fog Lamps |
| 11 | 10 | Left Headlight High Beam & High Beam Indicator |
| 12 | 10 | Right Headlight High Beam |
| 13 | 10 | Horn, Radiator Cooling Fan |
| 14 | 10 | Backup Lights, Electric Mirrors, Heated Front Seats, Windshield Washer Jets, Cruise Control, Power Roof |
| 15 | 10 | Engine Electronics |
| 16 | 15 | Warning/Indicator Lights, Multi-Function Indicator, Glove Box Light, ABS |
| 17 | 10 | Turn Signals |
| 18 | 20 | Fuel Pump |
| 19 | 30 | A/C, Radiator Cooling Fan |
| 20 | 10 | Brake Lights |
| 21 | 15 | Dome & Luggage Lamps, Clock, Radio, Central Locking System, Multi-Function Indicator, Vanity Mirror, OBD Diagnostic |
| 22 | 10 | Cigarette Lighter |
| Relay | ||
| 1 | A/C Control Module Relay | |
| 2 | Rear Window Wiper/Washer Relay | |
| 3 | ECM Power Supply Relay | |
| 4 | Load Reduction Relay | |
| 5 | Open | |
| 6 | Emergency Flasher Relay | |
| 7 | Headlight Washer Relay | |
| 8 | Washer/Wiper Intermittent Relay | |
| 9 | Seat Belt Warning Relay | |
| 10 | Fog Lamp/Parking Lamp Relay | |
| 11 | Dual Horn Relay | |
| 12 | Fuel Pump Relay | |
| 13 | Heater Control Module Relay | |
| 14 | Coolant Pump After-Run Relay | |
| 15 | Open | |
| 16 | Open | |
| 17 | Open | |
| 18 | Roof Ventilator Fan (Fuse) | |
| 19 | Heater Air Blower Relay | |
| 20 | Starter Interlock/Back-up Light Relay | |
| 21 | 5 | Back-up Lights, Cruise Control |
| 22 | 20 | A/C (Second Evaporator) |
| 23 | Rear Window Defroster/Heated Mirror Relay | |
| 24 | 20 | Power Windows, Central Locking System |
| 25 | 10 | ABS System |
| 26 | 15 | Rear Window Defroster, Heated Mirrors |
| 27 | A/C Compressor Clutch Relay | |
Version 2
Fuse box diagram (main box)
| № |
A |
Description |
| Relay assignment | ||
| 1 | (105) | Heater blower motor relay – rear (ventilation) |
| 2 | (174) | Rear window wiper / washer relay |
| 3 | (30/109) | Engine management relay |
| 4 | (18) | Ignition auxiliary circuits relay 1 |
| 5 | Reserve | |
| 6 | (22/21) | Emergency ventilation relay (with repeaters for direction indicators on the roof) |
| 7 | (95) | Headlight washer pump relay |
| 8 | (99) | Relay for intermittent operation of the windshield wiper / washer |
| 9 | (36) | Headlamps warning buzzer |
| 10 | (53) | Fog lamp relay |
| 11 | (53) | Horn relay |
| 12 | (167) | Fuel pump relay |
| Fuse | ||
| 1 | 10 | Left headlight – low beam, headlight range control |
| 2 | 10 | Right headlight – low beam, headlight range control |
| 3 | 10 | License plate lamps |
| 4 | 15 | Rear window wiper / washer, auxiliary ignition circuit relay 2, additional equipment |
| 5 | 15 | Windshield wiper / washer, heaters for windshield washer nozzles (05/01) |
| 6 | 30 | Air conditioning system, heater fan motor |
| 7 | 10 | Front right side / rear right side lamps |
| 8 | 10 | Lamps front left / rear left |
| 9 | 20 | Heated rear window, heated outside mirror |
| 10 | 15 | Fog lights |
| 11 | 10 | Left headlamp-high beam |
| 12 | 10 | RH headlamp-high beam |
| 13 | 10 | Sound signal |
| 14 | 10 | ABS system (with ESP), automatic transmission control system, additional equipment, central locking, cruise control system, power windows, power rear-view mirrors on the doors, reverse light (s) |
| 15 | 10 | Engine management system, crankcase ventilation heater, cruise control system, vehicle speed sensor |
| 16 | 15 | ABS indicator, glove box illumination lamp, turn signals, immobilizer, instrument cluster |
| 17 | 10 | Additional heater |
| 18 | 20 | Engine management system, fuel pump |
| 19 | 30 | A/C, Radiator Cooling Fan |
| 20 | 10 | Stop lights |
| 21 | 15 | Audio system, diagnostic connector (DLC), interior lamps, navigation system |
Additional Fuse box
It is located under the main block.
| № |
A |
Description |
| 1 | 15 | Accessory power connector |
| 2 | 15 | Trailer electrical connector |
| 3 | 10 | Roof identification light |
| 4 | 20 | Additional heater (AC V / AH Y / AJT / AU F) |
| 5 | 10 | Anti-lock braking system (ABS) |
| 6 | FOR Phone | |
| 7 | 15 | Taxi |
| 8 | 10 | Roof fan |
| 9 | 15 | Audio system, instrument cluster |
| 10 | 15 | Central locking |
| 11 | 15 | Heated seats |
| 12 | 30 | Heated door mirrors, heated rear window |
| 13 | FOR PHONE (ACV / AH Y / AJT / AU F) | |
| 14 | 30 | Air conditioning system – manual automatic temperature control |
| 15 | 20 | Additional heater |
Additional relay box 1
Located at the top of the main unit.
Relay box diagram
| № |
Description |
|
| 1 | (53) | Coolant pump relay |
| 2 | (125) | Idle speed control (AM) relay |
| 3 | (137) | Glow plug control unit (ABL) |
| 4 | (53) | Ignition auxiliary circuits relay 2 (some models) |
| 5 | (53) | Ignition auxiliary circuits relay 2 (AES, with air conditioning) |
| F1 | 30 | Power window fuse |
| F2 | 15 | Engine control unit |
| F3 | 15 | Actuator |
Additional relay box 2
It is located behind the dashboard in the center.
Fuse box diagram
| № |
Description |
|
| 1 | (106) | Auxiliary heater relay |
| 2 | Audio / Telephone Speaker Switch Relay | |
| 3 | (53) | (53) Heater blower motor relay – rear (warm air) |
| 4 | (114) | Heater blower motor relay – automatic temperature control |
| 5 | (152) | Heater radiator coolant valve relay (rear heater) |
| 6 | (38) | Air intake changeover actuator relay (A / C / heater) |
| 7 | (53) | Alternator relay (AES, with 150A alternator) |
| 8 | (53) | Alternator relay (ACV / AUF, with alternator 150A / automatic / automatic temperature control) |
| 9 | (175) | Start inhibit switch relay / reversing lamp relay |
| 10 | (87) | Wheel hub connection control unit |
Another unit can be located under the driver’s seat. The following items may be located there: (214/426) Relay for additional battery, (403) Relay for additional heater, (30A) Additional liquid heating system, (5A) Sockets , etc.
Engine compartment
Fuse box location
This unit is located on the cover in front of the battery.
Fuse box diagram
| № |
Description |
|
| 1 | 60A | Glow plug relay |
| 2 | 50A | Cooling fan motor |
| 3 | 50A | Cooling fan motor |
| 4 | 50A | Anti-lock braking system (ABS) |
| 5 | 110A/150A/175A | Generator |
| 6 | 30A | System of maintaining exchange rate stability |
| 7 | 30A | Anti-lock braking system (with ESP) |
| 8 | 5A | System of maintaining exchange rate stabilit |
WARNING: Terminal and harness assignments for individual connectors will vary depending on vehicle equipment level, model, and market.