Car Electrical Relay Switch

If you ve got an electric cooling fan on your classic car or hot rod and you want to know how to wire it with a.

Car electrical relay switch.

Step 4 once the relay has been identified gently grasp or touch the relay in question have a helper turn the ignition key to the on position then crank the engine over the relay should click in one of the ignition switch positions. We show you how to wire in an electric fan relay kit with a thermostatic switch. 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 instead it activates a relay which passes the signal on so that the car can start. If one of your accessories doesn t come on and you suspect the relay is bad you can perform a few simple tests.

If so the trigger circuit of the relay electrical system is working if not continue to next step. Online led store 6 pack bosch style 5 pin 12v relay kit interlocking harness socket holder 14 awg hot wires spdt 30 40 amp 12 volt automotive relays for auto fan cars by online led store 12 45 12. A relay is an electrically operated switch it consists of a set of input terminals for a single or multiple control signals and a set of operating contact terminals the switch may have any number of contacts in multiple contact forms such as make contacts break contacts or combinations thereof. An electrical relay is a switch that is under the control of another circuit.

If something were to fail and short the chances of an interior fire are significantly reduced if a relay is utilized to allow the higher voltage switching occur in the engine compartment. They employ an electromagnet device to mechanically switch and make or break an electrical circuit the type most commonly used in the auto industry is called a standard relay or a mini relay. If the relay clicks and the circuit is still not. 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.

Using a relay keeps the higher voltage out of the passenger compartment of the vehicle and is just less taxing on your vehicle s electrical system in general. Relays are used where it is necessary to control a circuit by an independent low power signal.