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post #1 of 3 (permalink) Old 01-07-08, 10:50 AM Thread Starter
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rear window dead

The rear window on my 88 fullsize won't move. I remember last time I was rolling it up it got real sluggish then I had to push it up while still turning the key in the back. Better stuck up than down I guess, but I don't know what it is. It won't work from the key or the dash switch, so I'm just assuming it's not a switch. When I use the dash switch I don't hear anything coming from the motor. Motor dead? If it is how do I change the motor with the window up in the back of the truck? Any suggestions would be great.

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post #2 of 3 (permalink) Old 01-09-08, 09:01 PM
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Re: rear window dead

I haven't run into "sluggisH" on mine. I keep having trouble with the dash switch.
Anyway, it sounds like weither a weak motor or a maybe a bad ground. Testing the motor is a pain but fairly straightforward. Crawl into the back and take all the screws out of the inside tailgate access panel. Look for the motor wires in the center. They wrap down and around to keep out of the way of the glass. About a foot away from the motor you should be able to find the plug. Unplug it and get a "jumpbox" or a spare car battery. Something with 12 volts. Use or make two small jumper wires. A pair of battery jumper cables with something small in each clamp works. Carefully contact both terminals inside the connector. Your window should roll down or attempt to roll up. Reverse the wires (positive and negative jumpers) to get the opposite action. Don't roll it all the way down, just enough to if it's working. If not then it is the motor. If it works fine then I'd look at the wiring and connectors. See if the window is getting a a full 12 volts AND a good ground.
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post #3 of 3 (permalink) Old 01-27-08, 07:15 AM
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Re: rear window dead

yo gang!
some info;
Look in my Site for Wiring Diagrams, repairs, replacements
Ford Bronco And F-150 Links - Tailgate

such as:
Rear window very slow--here's a fix
"...90% of you all probably already know this so I guess I'm talking to the other 10% of us who don't/didn't. My rear window has been giving me problems for the last 4 months. It would go down a few inches and it would get stuck. Then I would either have to rock the dash switch back and forth to get it to go down or go to the back and use the key with one hand and push down the window with the other---Very frustrating.

1) First roll down the window, drop the gate and take off the inside panel (about 8 philips head screws) covering the tailgate. You will see pretty much nothing but glass after doing this.
2) Then manually flip the latches so you can use the key to roll the window back up. ***Very Important*** Put something under the window to support it--sawhorse, lawnmower or whatever. The weight of the glass could cause it to break when rolled up with the tailgate down.
3) After the glass is up you'll have access to the inside mechanisms. If you bend over and look at the underside you'll see a couple of arms that attach to two 6"-8" pieces of channel. These arms move along the channel to raise and lower the glass.
4) Get some good grease and smear inside both channels. You don't have to glob it in there just put enough that it goes completely on and along the inside of the channels.
5) Roll the glass back down.
6) Put your inside panel back on.
7) Pull your tailgate release handle one time to make your latches go back to the open position and close your tailgate.
8) Now roll up your window and see if it helped any. Mine goes up just as smooth as ever now. It doesn't slow down a bit.
Good Luck,
by Brian
BTW, this took about 45 minutes start to finish..."

Motor Tester
Source: by Michael C

96 Bronco, E4OD, Man Xfer Case & Hubs
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1996 Bronco XL 5.0. E4OD
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