Troubleshooting electrical equipment (Mazda 121 (3))

When defects occur in the electrical system, it is very important to act systematically. This applies to both checking a burnt-out lamp and non-working electric motors.

The first step is always to check the fuse that protects the circuit in question. The location of the fuses is indicated on the fuse box cover and also in the relevant section below.

A faulty fuse must be replaced, and after switching on the corresponding consumer, always check whether it burns out again immediately after switching on. In this case, you need to find the fault and fix it. Most often, the cause of a burnout is a short circuit, i.e. somewhere, including inside the consumer itself, the "ground" and the positive contact are connected to each other.

Step two: If the lamp does not light or the electric motor does not rotate even though the fuse is in good condition, then you need to check the voltage supply.