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Old 04-27-2019, 11:39 AM #1
AntleredRuin AntleredRuin is offline
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No power rear window or wipers

Just discovered this this morning:
My power rear window and wipers don't work.

The window works from the lock cylinder, but not the dash button. Wipers don't work at all. The wiper fluid works fine, and the rear defrost works (or at least the light comes on).

All the other dash buttons work fine.

This one's weird. Obviously the window has power, or the key would not work. The wiper isn't jammed up, and I don't believe the system 'thinks' it is, or the defrost wouldn't work (IIRC, the light will just turn back off right after you press it).


Thoughts where I should start?

Last edited by AntleredRuin; 04-29-2019 at 09:24 AM.
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Old 04-27-2019, 01:09 PM #2
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Quote:
Originally Posted by AntleredRuin View Post
Just discovered this this morning:
My power rear window and wipers don't work.

The window works from the lock cylinder, but not the dash button. Wipers don't work at all. The wiper fluid works fine, and the rear defrost works (or at least the light comes on).

All the other dash buttons work fine.

This one's weird. Obviously the window has power, or the key would not work. The wiper isn't jammed up, and I don't believe the system 'thinks' it is, or the defrost wouldn't work (IIRC, the light will just turn back off right after you press it).


Thoughts where I should start?

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Much rear gate weirdness is due to broken or shorted wires in the harness between the gate and the body (up by the hinges). Start there.

Please give your year when asking for electrical help--ALWAYS. Rear wiring is very different between '99+ and before.
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Old 04-27-2019, 03:26 PM #3
AntleredRuin AntleredRuin is offline
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Quote:
Originally Posted by TheDurk View Post
Much rear gate weirdness is due to broken or shorted wires in the harness between the gate and the body (up by the hinges). Start there.



Please give your year when asking for electrical help--ALWAYS. Rear wiring is very different between '99+ and before.
Thanks, I'll start there.

Yup I spaced there. Its a 99 Limited. I even thought that because of the 99+ dash change, but then completely neglected to mention it.

Last edited by AntleredRuin; 04-29-2019 at 09:23 AM.
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Old 04-27-2019, 09:31 PM #4
Gymoutlaw Gymoutlaw is offline
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I would check fuses and relays first
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Old 04-28-2019, 07:32 AM #5
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As Durk suggested, check the harness.

See pics:

'02 T4R Rear Defrost
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Old 05-15-2019, 12:22 PM #6
AntleredRuin AntleredRuin is offline
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I finally got around to checking this out yesterday.
I got a CEL p1520 (Stop Light Switch Signal Malfunction), so I figured it was time to see what was up. Research showed that this was often caused by shorted wires as well.

It did turn out to be 3 wires in the loom that were messed up. 2 were broken cleanly, and the insulation on the 3rd was worn away, so it was shorting. They were all broken right at the base of the rubber cover.

I replaced the 2 broken ones and wrapped the broken insulation one with electrical tape.
I had to split the rubber cover underneath the plastic bracket that holds it to the liftgate to get some slack on the wires, and that's where I spliced in. I wrapped the hell out of the split with black electrical tape and might apply some black RTV if I suspect water is getting in.


Now my window and wipers work, and the CEL is gone too.

Easy fix, I was able to do it during my lunch break at work.
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Old 06-10-2019, 11:54 PM #7
geodiggr geodiggr is offline
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Was anything else affected? My rear wiper, window, and remote door locks wont work...all went down at same time.
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