When defects occur in the electrical system, it is very important to act systematically. This also applies to checks for a burnt-out lamp, as well as for idle motors.
The first step is always to check the fuse that is protecting the circuit in question. The location of the fuses is indicated on the cover of the fuse box, as well as further in the corresponding section.
A defective fuse must be replaced, and after switching on the corresponding consumer, always check whether it blows again immediately after switching on. In this case, you need to find the problem and fix it. The most common cause of burnout is a short circuit, i.e. somewhere, including within the consumer itself, are connected to each other «weight» and positive contact.
The second step: if with a good fuse, the lamp does not light or the electric motor does not rotate, then you need to check the voltage supply.