weird rear wiper - JeepForum.com

 
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post #1 of 13 Old 02-03-2009, 06:58 PM Thread Starter
jcrowley
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weird rear wiper

okay, so today out of the blue, whenever i depress the brake pedal, the rear wiper just comes on. it will even wipe intermittantly if i am at a stop light and keep my foot on the brake. otherwise, while i'm driving, it behaves normally.

the switch is turned off.

so, before i tear into it tomorrow, i wanted to know if anyone has seen this one, or have any constructive ideas about where to begin...under dash, etc.

it's a 97 sport, AT, I6

gracias.


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post #2 of 13 Old 02-03-2009, 07:04 PM
jeep95xj
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Id check for broken and or pinched wires in the harness going from the keep into the tail gate. Check in the rubber boot.
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post #3 of 13 Old 02-03-2009, 07:08 PM Thread Starter
jcrowley
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yep, i did a quick 5minute check in the dark with a flashlight, and didn't "see" anything obvious.....sorry for the pun.

i replaced the switch at the dash about a year ago. it would only work in the "wash mode" but not in intermittent. so, i dunno.

thanks for the advice. hopefully i'll post some results if i figure it out.

jc

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post #4 of 13 Old 02-03-2009, 07:12 PM
jeep95xj
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Have you had the kick panel or sill plates off lately? Run any wires? May have pinched the wiring when putting it back together. I work on cars every day i figure stuff like this out all the time but this is a new one for me lol.
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post #5 of 13 Old 02-03-2009, 07:16 PM Thread Starter
jcrowley
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nope, nothing of the sort really. i just got my dogs out of the back, closed the hatch, and on the ride to work i noticed the wiper moving every time i pressed the brake. it all just happened today.

i'll find out more tomorrow, or the day after i'm sure. it's just weird that it's happening as i press the brake even with the wiper switch off. it's getting power somehow.

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post #6 of 13 Old 02-03-2009, 07:25 PM
jeep95xj
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Yea thats why i said check the wiring between the jeep and the hatch focus on the wiring in the rubber boot. Id be willing to put $ of the fact thats where your problem is. Kinda funny actually lol Here's a thought, turn your rear wiper on and see if your break lights come on.
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post #7 of 13 Old 02-03-2009, 07:35 PM
LilRedDakota
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bad ground for brake lights back feeding through rear wiper motor? don't have schematic to figure it out
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post #8 of 13 Old 02-03-2009, 08:00 PM
AZ Jeff
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I am betting the issue is that the wire that feeds the high mounted center stoplight is cross-feeding to the power wire to the wiper motor. Of course, for that to happen, both wires must be broken, or at least have the insulation off of them where they are adjacent to each other in the wiring harness. The area where the harness passes through the hatch hinge line is the likely area for this issue.

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post #9 of 13 Old 02-03-2009, 08:27 PM
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haha I've never heard of that before. I bet it gets annoying though. I agree with the post above about the insulation wearing off and the two wires contacting each other.
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post #10 of 13 Old 02-03-2009, 08:40 PM
dameono4
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i had something kinda similar happen to me... everytime i hit the brakes the entire dash would short out, speedo, tach, radio, everything. It ended up being a wire in the rear of the jeep almost in between the speakers in the headliner. just an idea.

hope it helps, chris

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post #11 of 13 Old 02-05-2009, 07:17 AM
jeep95xj
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So whats the verdict, you figure out your problem?
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post #12 of 13 Old 02-06-2009, 04:18 AM Thread Starter
jcrowley
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no verdict yet. i pulled the rear hatch panel and unplugged the wiper motor for now. i got put on some overtime at work, so it looks like a saturday job now.

thank you all for the suggestions.

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post #13 of 13 Old 12-10-2009, 09:36 PM
mbat11
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I have a 97 xj with the exact same problem. So I took out the fuse (number 22) for the rear wiper and now the wiper stays put but every time I put on the brakes the rear washer fluid pumps out. You go through a jug in a day. Too bad the original author of this post did not circle back and post the verdict. I will check the wires for insulation at the tailgate.
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