Last Update: 10 Jan 2021

How to Test Power Window Switch With Multimeter?

James Kelly
James Kelly

Hi! This is James. I'm a professional writer and working on this field for a long time. Basically I love to write about everything related to tools, diy and home improvement. All my writings speak for itself as I'm passionate about this. I love to explore new things as well as new places whenever I get free time. You'll never find me free for this reason!

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Ever found yourself in a problematic situation on a rainy day where you can’t close the window of your car door due to malfunction, and risk your car seat getting wet? Or it’s a sunny day and you can’t open the window for enjoying a light breeze?

There may be many causes for this problem to occur. But you can easily troubleshoot the power window switch staying at home. You will just need a multimeter and some basic tools such as a screwdriver, probes cap, and test leads.

You do not necessarily have to be a skilled electrician to operate a multimeter. By reading this article you can test the power window switch with a multimeter and get to know the root of your problem.

How to Test Power Window Switch With Multimeter?

A multimeter is a hand-operated electrical tester used to measure voltage, current, resistance, continuity, etc. If you don’t have access to a multimeter you can easily buy it from your local store or order online without hassle.

It is a cheap piece of electrical equipment and surely it will be handy to you several times. There can be several steps to test the power window switch. But first, you will require some basic tools to operate on your car door.

Required Tools

Steps

1.Removing the lid:

First and foremost, you will need to shut off your car. Then you should carefully remove the lid to operate on the switch. You will need a screwdriver to remove the lid entirely.

But keep in mind, it depends on the car manufacturer about which type of screws they used and you will have to use the same shaped screwdriver accordingly. So it is always best to keep a set of screwdrivers.

Also in some cars, you will need to uncover the screws. Remove the lid carefully as cables are still connected to the switch.

2.Disconnecting the switch:

After removing the lid you will need to separate the switch from the lid. First, you have to disconnect the cables connected to the switch. You will see a white connector connected to the pins of the switch. Carefully remove the connector while holding the lid and the switch in one hand and the connector in the other. You need to be extra careful as cables are connected with the connector.

3.Check the multimeter on continuity mode:

Continuity means if a circuit is open and current can flow through it normally without resistance. This way you can ensure connectivity between two points.

If you have a digital multimeter set the multimeter’s rotating switch to the diode symbol with propagation waves. In the case of an analog multimeter switch to the omega symbol.

Now connecting the probe test leads to the multimeter accordingly to the color-coded socket and also the caps to the probe. Now touch the probes with each other.

In the case of a digital multimeter, you will hear a tone. And for an analog one, it will turn the indicator from left to right. We highly recommend you use a digital multimeter as it has more functions and easier to use.

4.Testing the switch:

Now, this is the main part of your testing process. You will know if your switch is a faulty one or a good one. But first, you will have to check if the switch moves up and down properly. If your switch is jammed, it already is a faulty switch. Most of the time you will need to change it immediately.

It is recommended to get a schematic diagram of the switch. You can easily find it online. Use an alligator clip to the negative probe, the black test lead of the multimeter. Now hook the clip on the negative terminal of the switch.

There will be several pins on the switch so it is easier to check the schematic and connect the probe to the right pin. Now take the positive red-colored probe and touch the positive pin in the raise window terminal.

At first, you won’t get any reading as the switch is in the neutral position. But if you press the raise window button on the switch you will get the continuity tone in your digital multimeter, meaning your switch is alright.

If it doesn’t produce a sound it is a faulty switch. But you should check multiple times in case of user error. The same result can be obtained in case you have an analog multimeter. We already told you in step 3 about how to read the continuity.

Now do the same thing for the lower window button on the switch, touch the positive terminal with the probe and press the switch. If again the continuity readings are right then there is no problem with your switch.

5.Make your decision:

If you find your switch faulty, you should buy a new switch for your car and install it. We will recommend you to swap with a new switch for the faulty one and put it back on your own. You already did the hard work on testing it so why not?

But if your switch is alright then you can put back the switch by taking backsteps, putting the switch in the lid, be sure to connect with the white connector, and screwing back the lid to the door.

If there isn’t any fault in the switch and the window still won’t move then we recommend you take the car to a car mechanic.

Safety precaution

Tips

Final Verdict

Although there could be many different causes for your car window to malfunction it also can be due to a simple faulty window switch. It won’t do you any harm to follow our guide and troubleshoot the switch on your own. If you follow our guide about how to test power window switch with multimeter thoroughly, I’m sure you can easily determine the condition of your power window switch.

Thank you for following our guide.

Easy Guide About How to Test Power Window Switch With Multimeter 1