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Rear Window Problem

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speedyvision917

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ok my rear window isnt working, anyone have any idea of what it could be? i have the back part off to see inside the hatch and i dont think anythings disconnected. i have an 88 gmc jimmy fullsize
 
Do either the key or the dash switch work? If neither are working, sounds like your not getting power back to the motor, or the safety switch went out, or you have a bad ground.

Grounds are easily fixed by cleaning, the safety switch is easily by-passed, only hard part would be trying wire faults.

But if you are getting power back to the motor, then the motor might be bad.

That will give you a few things to check /forums/images/graemlins/thumb.gif
 
Safety switch is the first thing to check -- they're notorious for failing.

The dead giveaway is that the window will go down, but not up.

Fiddle with the latch on the ... passenger side, I think... well, heck, fiddle with both. My experience is that mine stop working every now and again and banging on them sets them loose.

Do not, however, bang too hard. There's a foot-shaped dent in my otherwise nice CUCV tailgate because of that /forums/images/graemlins/laugh.gif

-- A
 
sorry for the hijack, but my dads sometimes goes up but will not go down. you mentioned that the safty switch will let it go down but not up, are you sure its not the other way around? where would you find the safty switch. /forums/images/graemlins/thinking.gif /forums/images/graemlins/thinking.gif
 
the safety switch is on the inside of the tailgate attached to one of the latches....most people just unplug the wires from the switch and splice them together to by-pass it /forums/images/graemlins/thumb.gif
 
My back window is a pain in the butt also. I am trying to figure a way to install a lift gate like the new Blazers and Tahoe.
The rear glass is also hard to find. After market glass is safety glass not tempered. Don't touch the edge of saftety glass with anything hard. Also most aftermarket glass has the wrong curve or arc to run smoothly in the tracks.
I may try some plexiglass to loose some of the weight.
 
Also, the cable can be bound up. If it has never been lubed, check it out.
I have replaced everything but the safety switch in mine. Be careful the regulator is spring loaded to go up. The regulator will take a finger off.
 
wheres the motor supposed to be located??? went lookin around in back before rippin up the carpet and didnt see anything that resembled a motor, also does anyone no where i can get a diagram of some sort of the back hatch...
 
Uhh, everything's inside the tailgate. If you have carpet on it, remove it, and remove the access panel on the gate, the one shaped like this

/---------\...../---------\
|---------|.....|---------|
|-------------------------|
|-------------------------|
|-------------------------|
\-------------------------/

and it's all in there, though not wonderfully accessible.

-- A
 
yaa i have that all open and was lookin in there does anyone have a real diagram of the tailgate*???
 
facing the inside of the tailgate, the motor is located just to the right of the handle and up at the top of the tailgate. Cable runs down to the bottom, around behind the regulator and up the otherside of the tailgate to the transmission(thats just whats its called lol)which is bolted to the regulator.

Anything else?
 
hmmm i think i might have found my problem, i dont remember seeing anything there....ill check tomorrow, wats it look like just so i no??? also its weird theres like one big gear that makes the window go up and down but i cant move it manually im guessing the motors supposed to hook up to that but i dunno cuz i dont see a motor
 
I have the exploded view. It would be better for me to send it to you as I am new to this board. Better yet I will post it on my web space and you can download it from there. back with the link in a while
 
Tailgate_Exploded.jpg
 
I have been hving problems with my window too. But I went out yesterday and WD-40ed the latches and the safty switch and now it seems to work pretty good. Much easyer than taking it apart /forums/images/graemlins/burb.gif
 
Try opening up the access panel and removing the window regulator cable found at the bottom of the window. Once you get it removed, try pressing the switch and see if you can hear the window motor turning. If it is, then the cable is just bound up from not being lubed. That was all that was wrong with mine, and Muddytazz sold me a new cable for $8.
-Harrison
 
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