Troubleshooting electrical equipment (VW Transporter T4)

When troubleshooting electrical equipment, it is important to be systematic. This applies to checking for burnt-out light bulbs as well as non-working electric motors.

The first step is to check the fuse that protects the appliance. The fuse set is marked on the fuse box cover.

Replace the faulty fuse and turn on the electrical consumer to check if it burns out again. If it does, you need to find and fix the fault. As a rule, this is a short circuit, i.e. somewhere in the circuit or in the device the ground has connected to the plus.

Step two: If the fuse is good but the glow plug does not light or the electric motor does not work, you need to check the power supply.