VW T4 Fuse Box Diagram & Relay Location (1990–2003)

The Volkswagen Transporter T4 was produced from 1990 to 2003 and was available with a wide range of petrol and diesel engines. The T4 family also includes the Volkswagen Caravelle, Multivan and California.

In this guide, you will find the Volkswagen Transporter T4 fuse box diagram, fuse locations, relay information and the purpose of the main electrical fuses.

We also explain which fuse is responsible for the cigarette lighter, headlights, heater blower, fuel pump, horn, windscreen wipers and other electrical equipment.

Important: Fuse layouts can vary depending on the production year, engine, equipment level and market. Always check the fuse card or wiring diagram supplied with your specific vehicle before replacing a fuse.

Where is the VW T4 fuse box located?

The main Volkswagen Transporter T4 fuse and relay box is located inside the passenger compartment, underneath the dashboard on the driver’s side.

Depending on the model and equipment, additional fuses and relays may also be installed:

• above the main fuse panel;
• behind the dashboard;
• under the driver’s seat;
• near the battery;
• inside the engine compartment.

Volkswagen T4 main fuse box diagram

Use the interactive fuse diagram below. Click or tap a fuse number to see what it protects.

VW T4 fuse assignment

• Assignment and rating may vary between different T4 versions.

VW T4 cigarette lighter fuse

On many Volkswagen Transporter T4 models, the cigarette lighter is protected by:

Fuse F22 – 10A

If the cigarette lighter or 12V socket has stopped working, check F22 first.

Some Multivan, Caravelle and California models have additional 12V sockets. These may use separate fuses located in an auxiliary fuse panel.

If a replacement fuse blows immediately, do not install a higher-rated fuse. Check the socket and wiring for a short circuit.

Volkswagen T4 relay box

The central electrical panel also contains the main vehicle relays.

Depending on the production year and engine, you may find relays for:

• fuel pump;
• engine management;
• windscreen wipers;
• rear window wiper;
• fog lights;
• horn;
• auxiliary electrical circuits;
• glow plugs;
• cooling system;
• heater system.

VW T4 Relay 109

Relay 109 is particularly important on many diesel Volkswagen T4 models.

It supplies power to parts of the engine management system. A faulty Relay 109 can cause problems such as:

• engine not starting;
• intermittent starting problems;
• engine suddenly stopping;
• unusual glow-plug warning light behaviour.

If a diesel VW T4 cranks but does not start, Relay 109 is one of the components worth checking.

Additional fuse panel

Some Volkswagen T4 models have an additional fuse panel underneath or close to the main central electrical panel.

These additional fuses can protect equipment such as:

The exact arrangement depends heavily on the vehicle specification.

Fuses under the driver’s seat

Some Volkswagen Transporter, Caravelle, Multivan and California T4 versions have additional electrical components underneath the driver’s seat.

This area may contain fuses or relays for:

• auxiliary battery;
• auxiliary heater;
• camper equipment;
• additional 12V sockets;
• seat heating;
• auxiliary electrical equipment.

California camper models can have significantly different electrical layouts because of their additional leisure equipment.

VW T4 engine compartment fuses

High-current fuses can also be located in the engine compartment, usually close to the battery.

Depending on the engine and model year, these may protect:

High-current fuse ratings and positions can differ considerably between engines.

VW T4 glow plug fuse

Diesel Volkswagen Transporter T4 models use a high-current fuse for the glow plug system.

Depending on the engine, it can be located close to the battery or elsewhere in the engine compartment.

If your diesel T4 is difficult to start when cold, check:

1. glow plug fuse;
2. glow plug relay;
3. glow plugs;
4. wiring;
5. battery voltage.

Common VW T4 fuses

Here are some of the most commonly searched Volkswagen T4 fuse locations:

Cigarette lighter: F22
Left low beam: F1
Right low beam: F2
Windscreen wipers: F5
Heater blower: F6
Fog lights: F10
Left high beam: F11
Right high beam: F12
Horn: F13
Fuel pump: F18 on applicable versions
Brake lights: F20
Radio/interior equipment: F21

What to do if a fuse keeps blowing

A fuse normally blows because too much current is flowing through the circuit.

If the replacement fuse blows again, check:

• damaged wiring;
• short circuits;
• corroded connectors;
• damaged 12V socket;
• electrical motors;
• aftermarket radio;
• alarm system;
• trailer wiring;
• aftermarket accessories.

Never solve the problem by installing a fuse with a substantially higher amp rating.

Conclusion

The main Volkswagen Transporter T4 fuse box is located underneath the dashboard on the driver’s side. Depending on the year and equipment, additional fuse and relay panels may be installed behind the dashboard, underneath the driver’s seat and in the engine compartment.

For many T4 models, Fuse F22 (10A) protects the cigarette lighter.

Because the Volkswagen T4 was produced between 1990 and 2003 with numerous engines and equipment configurations, always compare the fuse assignment with the information for your specific vehicle.