Windows not working

2005 MERCURY MOUNTAINEER
150,000 MILES • 4.0L • 6 CYL • 4WD • AUTOMATIC
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EJAMIE43
  • MEMBER
  • 1 POST
All four of my windows won't work. Replaced the switch in the driver side door and they still won't go down. Is there something else I can do?
Aug 20, 2019 at 6:53 PM
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JACOBANDNICKOLAS
  • ASE Certified Mechanic
  • 110,193 POSTS
  • ASE Certified Mechanic
Welcome to 2CarPros.

The first thing we need to check is if there is a bad fuse. There are three I need you to check. See picture 1.

Here are a couple links you may find helpful:

https://www.2carpros.com/articles/how-a-car-fuse-works

https://www.2carpros.com/articles/how-to-check-a-car-fuse

If they are good, you need to next check the window relay. See picture 1.

In this case, see if there is another relay with the same part number and switch them. If there isn't, here is a link that explains how to test a relay:

https://www.2carpros.com/articles/how-to-check-an-electrical-relay-and-wiring-control-circuit

Here are a few links you may find helpful when testing electrical components:

https://www.2carpros.com/articles/how-to-use-a-test-light-circuit-tester

https://www.2carpros.com/articles/how-to-use-a-voltmeter

https://www.2carpros.com/articles/how-to-check-wiring

There is a circuit breaker in the system, but lets start with what I listed.

Let me know what you find or if you have other questions.

Take care,
Joe

Aug 20, 2019 at 8:10 PM
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