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Power windows not working

Tiny
NAS0151
  • MEMBER
  • 2003 MERCURY MOUNTAINEER
Electrical problem
2003 Mercury Mountaineer 6 cyl All Wheel Drive Automatic

I have replaced the window lift motor and the window switch to the front passenger door. The window still does not go up and down. I tried them in the rear door and they work there. If the switch in the driver door was bad, would that cause the window motor not to work? What else to I need to check?

All windows work from master switch and I have not seen any exposed wires. I have not checked with a meter, just visual. I was wondering if master switch could be bad, or if there is a fuse or relay to check?
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Sunday, August 15th, 2010 AT 8:30 PM

33 Replies

Tiny
KEN L
  • MASTER CERTIFIED MECHANIC
  • 42,798 POSTS
Hello,

Yes the master switch is most likely bad becasue the entire systems power runs through the main control switch located at the drivers door. Here is a guide that will give you an idea on how to test it.

https://www.2carpros.com/articles/electric-window-repair

and

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

and

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

Here is how it will be to change the switch in your car and I will include the wiring diagrams so you can see how the system works. (below)

Please let us know if you need anything else to get the problem fixed.

Cheers, Ken
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Friday, November 10th, 2017 AT 3:42 PM
Tiny
WEST201
  • MEMBER
  • 8 POSTS
  • 2003 MERCURY MOUNTAINEER
  • 89,000 MILES
I replaced master switch drivers door, fuse under dash circuit breaker under hood
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Friday, November 10th, 2017 AT 3:42 PM (Merged)
Tiny
WEST201
  • MEMBER
  • 8 POSTS
I will donate a nice donation if solution works, previously been ripped off so skeptical sorry nothing personal
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Friday, November 10th, 2017 AT 3:42 PM (Merged)
Tiny
SATURNTECH9
  • MECHANIC
  • 30,870 POSTS
Do you have a mulitimeter to do some testing?We need to trouble shoot this problem to find it.
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Friday, November 10th, 2017 AT 3:42 PM (Merged)
Tiny
WEST201
  • MEMBER
  • 8 POSTS
Yes
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Friday, November 10th, 2017 AT 3:42 PM (Merged)
Tiny
SATURNTECH9
  • MECHANIC
  • 30,870 POSTS
Alright left side of engine compartment drivers side at the fender apron in the fuse box see if fuse number 6 60amp has power to both sides. Also behind the left side of the dash in the fuse box fuse number 17 15amp see if there is power to both sides of that fuse. Let me know what you find.
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Friday, November 10th, 2017 AT 3:42 PM (Merged)
Tiny
WEST201
  • MEMBER
  • 8 POSTS
Yes power to both
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Friday, November 10th, 2017 AT 3:42 PM (Merged)
Tiny
MARK MAKAREWICH
  • MEMBER
  • 10 POSTS
  • 2002 MERCURY MOUNTAINEER
  • 3.6L
  • V6
  • AWD
  • AUTOMATIC
  • 180 MILES
Stopped working, checked sixty amp fuse under the hood checked the number seventeen underneath the steering wheel. I am not sure if it is the relay or not and or where it is.
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Friday, November 10th, 2017 AT 3:42 PM (Merged)
Tiny
SATURNTECH9
  • MECHANIC
  • 30,870 POSTS
Ok behind the left side of the dash there will be a light blue wire with a black stripe coming out of thr fuse box it should have power with the key the run position.
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Friday, November 10th, 2017 AT 3:42 PM (Merged)
Tiny
CARADIODOC
  • MECHANIC
  • 33,723 POSTS
All the windows are not working in both directions? If so, start by inspecting the wires between the driver's door hinges to see if any are frayed or broken.

Did they all stop working at the same time, or did anything noteworthy happen leading up to this?
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Friday, November 10th, 2017 AT 3:42 PM (Merged)
Tiny
WEST201
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  • 8 POSTS
Yes it has power
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Friday, November 10th, 2017 AT 3:42 PM (Merged)
Tiny
MARK MAKAREWICH
  • MEMBER
  • 10 POSTS
Nothing out of the ordinary just stopped working.
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Friday, November 10th, 2017 AT 3:42 PM (Merged)
Tiny
SATURNTECH9
  • MECHANIC
  • 30,870 POSTS
Now key in the run position go to the master window switch on the drivers door see if the light blue wire with a black stripe has power going into the switch?
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Friday, November 10th, 2017 AT 3:42 PM (Merged)
Tiny
MARK MAKAREWICH
  • MEMBER
  • 10 POSTS
I have looked at the sixty amp fuse under the hood it is okay I believe the thirty amp relay under the hood is also working properly I am getting power to the fifteen amp fuse that people online say controls the power windows in the driver's compartment. I am also getting power to the blue wire with the black stripe leading into the drivers cluster I cannot figure out why my windows are not working.
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Friday, November 10th, 2017 AT 3:42 PM (Merged)
Tiny
WEST201
  • MEMBER
  • 8 POSTS
Are you stumped too
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Friday, November 10th, 2017 AT 3:42 PM (Merged)
Tiny
CARADIODOC
  • MECHANIC
  • 33,723 POSTS
Activate the driver's window switch while measuring the voltage on the black wire at that switch assembly. All voltage measurements should be done with that switch plugged in, to be accurate. Back-probe through the back of the connector next to the wires.
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Friday, November 10th, 2017 AT 3:42 PM (Merged)
Tiny
WEST201
  • MEMBER
  • 8 POSTS
Yes there ias power on both ends of the wire
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Friday, November 10th, 2017 AT 3:42 PM (Merged)
Tiny
ILITMAN
  • MEMBER
  • 2 POSTS
  • 2005 MERCURY MOUNTAINEER
  • 120,000 MILES
2005 Mountaineer V8. Audio and accessory delay still work. I'm thinking its not the 60 amp fuse. Your thoughts?
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Friday, November 10th, 2017 AT 3:42 PM (Merged)
Tiny
BMRFIXIT
  • MECHANIC
  • 19,053 POSTS
Start checking fuses and than driver door harness
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Friday, November 10th, 2017 AT 3:42 PM (Merged)
Tiny
WEST201
  • MEMBER
  • 8 POSTS
Please help
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Friday, November 10th, 2017 AT 3:42 PM (Merged)

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