A myriad of electrical gremlins can come to light with a car’s age—bad terminals, broken wires, blown fuses, and even fried relays. Knowing how to diagnose those problems can be the difference between ...

Many electrical components in a vehicle or machine are controlled by a relay. So if a component isn’t working because electricity isn’t getting to it, there is a possibility the relay may be faulty.

A relay is an electromechanical switch that controls the circuit flow of electrical power. It is a critical component in various devices, including home appliances, automobiles, and industrial ...