Power Window Motor

Tiny
JEXEE
  • MEMBER
  • 1994 JEEP GRAND CHEROKEE
  • V8
  • 4WD
  • AUTOMATIC
  • 188,000 MILES
I have a '94 Jeep Grand Cherokee 5.2 liter engine and the passenger side power window does not work. How do I test the motor to see if it is defective. Thanks.
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Monday, June 27th, 2011 AT 9:53 AM

4 Replies

Tiny
CJ MEDEVAC
  • EXPERT
One sure fired way of placing the blame on the motor or something mechanical near the motor

. And it not the wiring or switches that go there.

Does your Dome light dim down when you attempt to move the window? Or do you hear fruitless turning of the motor sounds, and no movement.

If so, the motor itself or linkages in the door are not allowing the motor's armature to turn. It's trying, if it's pulling amps, and the light dims.

If no results or sounds at all, it could be any of the the above, that I mentioned.

On some older Fords, I have been able to remove the motor, disassemble it, clean the armature, grease the bushings, reassemble it, and adjust the armature shaft pre-load. And all be fine!

Even though the units were sorta sealed up, like they were expendable, sacrifice assemblies. With understanding of how a DC electric motor works, they were EZ to mess with.

If The older Fords motors worked and did turn, many times the Clutch thingee on the end of the motor would be the problem. It had 3 nylon "pellets" that would get Old, Brittle, crunched up. The motor would turn and make racket, but the clutch thingee would sorta act stripped and the window would not move.I found that if you "tore" the clutch part, cleaned out the now crumbled up 3 nylon pellets.3 steel ball bearings could take their place (they had to be small enough for the cover to fit back on). All was good thereafter!

The Medic
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Monday, June 27th, 2011 AT 11:19 AM
Tiny
JEXEE
  • MEMBER
Thanks CJ. The motor has been running real slow for the past few years, that's why I think it finally went. In the past, silicon spray was used but that only helped somewhat for a day or two. That's why I think that the motor finally bit the dust. No sound at all is coming from the motor now and no, the dome light does not dim when actuating the switch. I have read that you have to be careful taking the old motor out if it either gear driven or cable driven. I think gear driven means that the, what they call the "clock spring" has tension on it and releases immediately when taking the motor out. There are precautions that have to be taken, but I don't know if it is gear or cable driven and what precautions have to be taken. Would you have any knowledge regarding this? Thanks so much for your help.
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Friday, July 1st, 2011 AT 6:20 PM
Tiny
JEXEE
  • MEMBER
Thanks CJ, you have helped greatly.
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Saturday, July 2nd, 2011 AT 4:42 PM
Tiny
CJ MEDEVAC
  • EXPERT
Thanks for being patient!

Tell the Big Guys I deserve 3 days away, with use of the the Leer, unlimited fuel, anywhere I want to go. They can babysit the Wife and grown step-monsters while I'm gone. TeeHeeHeeHee!

If ya ever need me. Respond at this post again, if you need computer operated car assistance, submit a new question. The Old stuff is where I excel!

Thanks for using us. You owe me lunch too! Lol!

The Medic
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Saturday, July 2nd, 2011 AT 6:54 PM

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