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Rear Wiper Won't work - I've tried many things


 
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Brad S
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Joined: 10 Sep 2004

PostPosted: Sat Mar 18, 2006 11:34 am    Post subject: Rear Wiper Won't work - I've tried many things Reply with quote

My rear wiper (95 ZJ) stopped working about a month ago, it made a few last attempts, then stuttered to a hault. At first I thought it was the motor. I got a new motor and tried it, but it would not work. The autoparts store gave me a refund and returned my old motor to me. I took the old motor and hooked a small pair of jumper cables to the battery and straight to the two points of the wiper motor. This caused the motor to start moving, but slowly with a squealing noise.
I then went to this page: http://www.nagca.com/grandtech/rearwiperrepair.htm and followed the instructions to clean out the corrosion and buildup in the wiper shaft. This fixed the problem of the motor strain. When I hooked it up to the battery again, it worked great.
OK, so motor is still good.
I then hook it back up to the pigtail on the liftgate, but it still doesn't work.
I check the fuse for the rear wiper in the fuse box, but it is still good.
I then proceed to electrical diagnosis, and this is where I am not sure about what I am doing totally.

I grab my electrical tester and proceed to check the pigtail to see if I'm getting power at the liftgate.
Here is the diagram of my plug:



I assume black is the ground, so I poke it with the neg. on my tester (set to read 20vdc). I then proceed to check each point.

1st attempt (wiper set to the 'on' position) - I receive:
Brown/Green - 0
Red/Black - 12.18
Brown/Orange - 0
Black/White - 0
Brown/Black - 11.48

2nd attempt (wiper set to the 'delay' position):
Brown/Green - 0
Red/Black - 12.18
Brown/Orange - 12.04
Black/White - 0
Brown/Black - 11.48

I am at a loss as to what to do next because I don't have an electrical diagram to tell me what the different colors mean. If someone could help me out, I would greatly appreciate it.
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fireguy08
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Joined: 29 Jun 2005
Location: prov. ri

PostPosted: Sat Mar 18, 2006 5:27 pm    Post subject: rear wiper Reply with quote

It most likely is the ground wire, check at the connector that goes from hatch to body
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1fox2go
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Joined: 01 Dec 2004
Location: Fishersville, Virginia

PostPosted: Sat Mar 18, 2006 6:04 pm    Post subject: Reply with quote

Mine did this as well, i first checked the fuse and it was good but i noticed some build up on the prongs scraped it off to reveal shiny metal and it worked
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Brad S
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Joined: 10 Sep 2004

PostPosted: Sat Mar 18, 2006 6:22 pm    Post subject: Reply with quote

Hmm, ok, I'll check that again, thanks for the advice. When I checked it the first time, I seem to recall that it was shiny, but I didn't really look too closely.
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daggie
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Joined: 26 Mar 2006
Location: UK

PostPosted: Sun Mar 26, 2006 7:36 am    Post subject: Reply with quote

did you get it fixed ?
Mine did the same as yours, ie: worked on the bench but not on the jeep Rolling Eyes with the tail gate OPEN, I closed & it worked
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Brad S
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Joined: 10 Sep 2004

PostPosted: Sun Mar 26, 2006 1:52 pm    Post subject: Reply with quote

Nope, I have not gotten it fixed yet. I found out that I'm not getting power to the tailgate, using my volt meter, but other than that I don't know why. Fuse seems to be good. I guess it might be the switch??
oh and btw, yes the tailgate was closed. It still doesn't work.

I have a free oil change at the dealer, I think they might take a look at it. I told em to let me know what they find.
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Jeep Iceland
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Joined: 12 Nov 2004
Location: Iceland

PostPosted: Sun Mar 26, 2006 3:05 pm    Post subject: Reply with quote

I think there is a relay for the wiper motor too not just the fuse,check the relay.
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Brad S
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Joined: 10 Sep 2004

PostPosted: Tue Mar 28, 2006 1:23 pm    Post subject: Reply with quote

Is the relay attached to the motor, or is it in a different location?
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Brad S
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Joined: 10 Sep 2004

PostPosted: Mon Apr 03, 2006 12:47 pm    Post subject: Reply with quote

I found the relay, it appears good. There is no holes burned in it or anything.

Guess I'll see what the shop guys find.
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RockOn
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Joined: 04 Mar 2006
Location: Murfreesboro, TN

PostPosted: Thu Apr 06, 2006 3:55 am    Post subject: Reply with quote

you can not determine if a relay is good or bad by looking at it.

relays use a coil of wire (like a speaker) and magnatism to operate. Test the thing with you meter. Wink
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Brad S
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Joined: 10 Sep 2004

PostPosted: Thu Apr 06, 2006 10:20 am    Post subject: Reply with quote

Apparently my switch is bad. I'm going to try and pull it out of the dash to replace myself to save money, anyone know of any good ways to do this/ and tutorials that explain?

any help would be greatly appreciated!
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RockOn
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Joined: 04 Mar 2006
Location: Murfreesboro, TN

PostPosted: Thu Apr 06, 2006 9:45 pm    Post subject: Reply with quote

Well my dash is completely different than yours....

Just take your time, be careful not to crack the plastic Wink
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Brad S
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Joined: 10 Sep 2004

PostPosted: Tue Apr 11, 2006 4:09 pm    Post subject: Reply with quote

Alrighty, so I have a replacement switch on the way. Would anyone appreciate a write-up of removing the front dash section on a 95ZJ?
If not, thats cool, but I figured since I'm tearing it apart, I could take some pics and note where screws are..
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