front electric windows stopped working

2005 MERCEDES BENZ ML500
188,000 MILES
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DANIELERASMUS
  • MEMBER
  • 1 POST
Front electric windows "locked" in closed position. All fuses seem ok.Rear door windows works 100%.
Oct 30, 2011 at 6:41 AM
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SQM
  • ASE Certified Mechanic
  • 6,383 POSTS
  • ASE Certified Mechanic
Hello,

There are 2 relays for the front window motors located under the hood fuse box (see diagram below). Check those relays first. Visually inspect for any corrosion or burnt pin(s).
You can also test the relays:

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

If the relays are good, you will need to check to see if you are getting power to the window motors. This will require taking off the inside door panel to access the wires. If you have power to the connector then the motor is likely bad.

https://www.2carpros.com/articles/door-panel-removal
https://www.2carpros.com/articles/how-to-check-and-replace-a-electric-power-window-motor

I have attached diagrams for your reference.

Please let me know of any questions.
Thank you.
Sep 26, 2021 at 7:55 PM
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