- switches large currents remotely from the circuit in which this current flows, allowing the use of thinner wires and switch contacts;
- has more than one control input unlike a mechanical switch;
- performs the function of a timer, for example, sets the wiper interval.
If the electrical circuit controlled by the relay fails and the cause of the failure is probably the relay, listen to the relay while the system is on. If the relay is working properly, you should hear a click when it turns on. If the relay is OK, then the cause of the malfunction lies in the elements or connecting wires. If the relay does not work, this means that it does not receive the main power supply or control pulse, or the relay is faulty.
Most of the relays are located in the fuse and relay box located in the engine compartment.
Some specialized relays are located separately or in separate blocks under the instrument panel and in the engine compartment.