How to Troubleshoot an Automotive Relay?

Answer The use of relays in an automobile is to keep high amperage wires under the hood rather than in the cabin of the vehicle. The reasoning is that high amperage wires used for the headlights, fans, ai... Read More »

Top Q&A For: How to Troubleshoot an Automotive Relay

Automotive Relay Styles?

The styles of automotive relays depend mainly on the amount of current they will control. Maximum current ratings range from 40 to 200 amps. Other styles regard connection layout.

What is an Automotive Relay?

An automotive relay takes a small signal from some sort of actuator switch such as a brake pedal sensor, ignition key or reverse safety switch and uses it to activate the required circuit.

How to Test an Automotive Relay?

Automotive relays are used to control any accessory that draws more than 30 amps of current, including power windows, lights, fog lights, air conditioner, fog horns, heated windows and many other a... Read More »

How to Wire an Automotive Relay?

Every circuit added to a modern car should be run through an automotive relay. The factory wiring in modern cars is light gauge, and is not designed for additional loads. A relay can be used to pow... Read More »