Front electric windows stopped working

Tiny
DANIELERASMUS
  • MEMBER
  • 2005 MERCEDES BENZ ML500
  • 188,000 MILES
Front electric windows "locked" in closed position. All fuses seem ok. Rear door windows works 100%.
Sunday, October 30th, 2011 AT 6:41 AM

1 Reply

Tiny
SQM
  • MECHANIC
  • 6,383 POSTS
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.
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Sunday, September 26th, 2021 AT 7:55 PM

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