A relay is an electrically operated switch. An electrical relay is a switch that is under the control of another circuit.
Automotive Relays And How They Work
What does a relay do in a car. If one of your accessories doesnt come on and you suspect the relay is bad you can perform a few simple tests. What is a relay. How does a relay work. If a component that is fed with electricity through a relay see how car electrical systems work terminal of the battery to the feed terminal on the component thereby bypassing the relay and supply wiring. Whenever you operate a switch to an accessory in your car that carries a lot of current such as the lights wipers or horn you run a small amount of current through a relay which in turn closes contacts to operate the accessory. The heart of a relay is an electromagnet a coil of wire that becomes a temporary magnet when electricity flows through it.
A classic example is the system used to start a car when someone turns an ignition key the ignition does not interact directly with the car battery. It consists of a set of input terminals for a single or multiple control signals and a set of operating contact terminals. A relay is an electromechanical or electronic device through which a heavy load can be switched on off with a nominal input of current voltage. Instead it activates a relay which passes the signal on so that the car can start. This article focuses on electro mechanical relays used in automotive applications. A relay is an electromagnetic switch operated by a relatively small electric current that can turn on or off a much larger electric current.
The switch may have any number of contacts in multiple contact forms such as make contacts break contacts or combinations thereof.
Gallery of What Does A Relay Do In A Car
