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How To Test A Car Relay With A Multimeter

If you’re like most car enthusiasts, you love nothing more than tinkering with your vehicles. Whether it’s fixing a tiny issue or upgrading to the latest and greatest technology, you don’t stop until everything is just right. One of the great things about cars is that they’re built to be easily repaired—and that includes the electrical systems. But how do you know if something is wrong with your car’s electrical system? If you have an issue with your car, the first thing you should do is check all of the fuses and relays. If you can’t find the problem, you may need to take your car into a mechanic for further inspection. In this blog post, we will show you how to test a car relay with a multimeter.

What is a car relay?

A car relay is a device installed in a car to control various functions, such as the lights, the horn, and the windows. These relays are usually controlled by a switch on the dashboard. When something goes wrong with one of these switches, the relay becomes activated, causing all of the aforementioned functions to suddenly stop working.

To test a car relay, you will need a multimeter. First, determine which wire goes to which switch on the dashboard. Then, connect one end of your multimeter to that wire and the other end to another wire coming from the relay. Make sure that both wires are securely connected and that the multimeter is set to continuity testing. Now turn on the power to the vehicle and check to see if any of the functions listed above have stopped working. If everything looks good, then your relay is probably defective and should be replaced.

How to test a car relay

Testing a car relay is an easy way to determine if it is working properly. To test a car relay, first disconnect the power to the car by opening the hood and turning off the breaker. Next, use a multimeter to test for voltage at each pin on the relay. If there is no voltage at any of the pins, then the relay is likely not working and should be replaced.

What to do if the car relay doesn’t work

If you have a car relay that doesn’t seem to be working, there are a few things you can do to try and troubleshoot the issue. First, check to see if there is power going to the relay. If you don’t have any power going to the relay, you may need to replace it. Next, check the connections on the relay. Make sure that they are tight and not corroded. If everything looks okay, then you may need to test the circuit by using a multimeter. To do this, connect one end of the multimeter to the positive terminal on the car battery and the other end of the multimeter to one of the terminals on the relay. If there is power going through the relay, then it should show up on the meter. If there is no power going through the relay, then it will not show up on the meter.


In this article, we are going to be discussing how to test a car relay with a multimeter. By doing so, you will be able to identify any malfunctions and fix them before they cause any major problems. Remember, always use caution when working with electrical components — if something seems too good to be true, it probably is! Let us know in the comments below whether or not you managed to successfully test your car relay.