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Old 03-13-2008, 06:53 PM
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Tailgate window question 88 GW

Yeah, yeah, yeah another tailgate window question. You'd think after owning as many of these as I have I'd know everything there is to know about these by now but every Full Size Jeep wagon I've ever owned has had a working back window. That and I've never played with a mid-86-91 GW before.

Anywho, a coworker has an '88 or '89 maybe '87 GW and the window won't go up or down and the defroster doesn't work. Before I start giving him advice what should be checked out first? All the fuses looked good and the safety trigger in the tailgate looked OK.
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Old 03-13-2008, 06:57 PM
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Old 03-13-2008, 09:24 PM
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Check the switches at the dash for 12v first. The window switch has a purple with red stripe wire that should have 12v and the defroster has a white with black stripe wire that should read 12v. Both of those are with the key on. On the tailgate switch the brown wire is for going up and the tan wire is for down. On the defroster switch the blue wire should have 12v when the switch is on. I think I remembered those wire colors correctly. The defogger and tailgate window don't share any circuits so the problems are separate.
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Old 03-14-2008, 05:51 AM
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When you figure it out, you can come by sometime and get the one down in the my other 88 Sean.

A lot of times, I see the defroster wire contacts (blade connector) on the glass broke off or the wires unplugged.
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Old 03-14-2008, 06:39 AM
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The safety switch on the side of the tailgate is probably bad. IIRC, you should have 12V in the tailgate with the key off.
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Old 03-14-2008, 07:44 AM
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Check the IFSJA tech site. There is a great write up on this by Baxter. Nine out of ten times it is the paddle switch that has failed.
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Old 03-14-2008, 09:43 PM
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Quote:
Originally Posted by donwag
Check the IFSJA tech site. There is a great write up on this by Baxter. Nine out of ten times it is the paddle switch that has failed.

The whammy bar looking switch on the inside driver's side of the tailgate? That's always the first thing I bypass. IE: slide it until it gets hung up on the tailgate body &can't move.

Thanks for the tips!

Flint-Did ya just get this'n or have ya had it awhile?
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Old 08-04-2010, 08:08 AM
clabelle clabelle is offline
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does anyone have a diagram of the rear door panel? new to the IFSJA organization and trying to figure out what type of bolts hold the motor in and what the heck I'm looking at here.

i have an 88 jeep grand wagoneer
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Old 08-04-2010, 08:10 AM
clabelle clabelle is offline
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Quote:
Originally Posted by 710 Burner
The safety switch on the side of the tailgate is probably bad. IIRC, you should have 12V in the tailgate with the key off.


where is this safety switch you speak of?
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Old 08-04-2010, 08:11 AM
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here ya go...
http://oljeep.com/gw/elec/GW_wiring.html
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  #11  
Old 08-04-2010, 10:15 AM
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Its on the left side close to the latch. Have your "friend" lean on the tailgate in that area and try the key switch. He might get lucky.
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  #12  
Old 08-04-2010, 12:40 PM
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^^^
that works sometimes...I've also used a coat hanger to get the switch to make. The little arm got bent and smashed a while back.

If the glass is stuck UP -

-unscrew the tail gate panel from the inside and reach in and fish around until you find the wires going to the safety switch (will be upper right from inside looking to the rear) This won't be too comfortable if you have big arms.

-Feel where they go into the switch and unplug them (female blade terminals)

-then pull them back where you can work on them and jumper them out. Then wrap them up and throw on some zip-ties to keep them out of the way.
-Try the window again. This is a good fix if the glass stuck up and neither switch works. Once you get the gate open then you can investigate what is the matter with the switch (see if it's bent or switch is corroded not making contact....whatever).

I had played hell with my tail gate more than once, and since I jumpered the safety switch and lubed the channels I have had no issues since.
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Last edited by CutterN55 : 08-04-2010 at 12:46 PM.
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