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Unread 07-25-2009, 02:20 PM   #1
IslandManMitch
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1996 ZJ 
 
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ZJ Electric Trailer Brakes

My '96 ZJ Limited came with the trailer wiring factory installed. I bought a trailer that has electric brakes. Where do I connect a brake controller? Is it prewired under the dash somewhere? Do I have to buy a special controller? Thanks for any information you can render.

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Unread 07-25-2009, 09:20 PM   #2
BlackDaddyZJ
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its not prewired under the dash you have to run the wires. You do have to buy a controller for it and i suggest draw tite. i never had a problem with mine and its now 8 yrs old. I personally mounted it to the right of the steering wheel under where the rear wiper switch is. easy to access there.
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Unread 07-25-2009, 09:36 PM   #3
Dillonzj
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Some ZJs with the tow pkg. did come prewired for the trailer brakes... and controllers..
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Unread 07-26-2009, 08:21 PM   #4
vansskaterfreek
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i have a drawtite and its been good to me so far, there is a blue wire under the dash that runs to the rear of the vehicle for the brakes, you just have to run the power, ground and the wire to the brake controller to the brake switch.... i mounted mine right under my transfer case shifter in my zj....its out of the way and you can access everything.
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Unread 07-27-2009, 04:48 PM   #5
IslandManMitch
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Blue wire

I found the blue wire. It was even tagged "Electric brake". Thanks for the help.
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Unread 07-19-2013, 10:01 AM   #6
dcpnz
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Dredging up an old thread here but seems appropriate place for it.

I'm wiring up a brake controller and 7 pin on my '97 ZJ.

I have the blue wire under dash labeled "Electric Brake".
Question is where is the other end most likely to be hidden in the rear of the vehicle?

Have found good directions for connecting the stoplight wire and should be straightforward to run 12v + and ground.

I do not have factory tow package but appears my '97 ZJ Ltd did come standard with transmission cooler.

Thanks
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Unread 07-19-2013, 10:06 AM   #7
dnuccio
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to use the factory electric brake wire, you need a factory trailer wiring harness. the wire goes to the rear passenger side, but it is in the plug that the factory trailer wiring plugs into. im sure you could probe around and find it, but then you would have to chop up the wiring harness. not something i would do, but to each his own.
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Unread 07-19-2013, 11:09 AM   #8
dcpnz
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Rear passenger side huh!!
That'd be typical to put it on the other side from the easy access panel behind the spare where my aftermarket 4 pin flat pigtail connects.

I guess I'm running my own wire then unless someone can help me with part # or link to factory harness for 7 pin for '97 ZJ.
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Unread 07-19-2013, 12:51 PM   #9
SLOspeed
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96 and up had the pigtail (and the whole wiring harness) on the driver side, behind and forward of the spare tire. Roughly centered on the rear window. You have to remove the side panel to get to it. The trailer harness should be available from a dealer, or maybe at one of the online Jeep vendors. I picked mine up at a junkyard for a few bucks.

Since you already have the blue "trailer brake" wire, you have the trailer prep package which has the pigtail for the wiring to plug into. Non-trailer prep vehicles do not have the blue wire OR the pigtail, so you'd be on your own for wiring up a trailer.
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Unread 07-19-2013, 01:13 PM   #10
dnuccio
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Quote:
Originally Posted by SLOspeed View Post
96 and up had the pigtail (and the whole wiring harness) on the driver side, behind and forward of the spare tire. Roughly centered on the rear window. .
ohhhhhhhh thats why i could never find it on mine. koreazj posted the diagram for the 96+. i guess 93-95 were on the passenger side
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Unread 07-19-2013, 04:26 PM   #11
dcpnz
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Thanks SLOspeed

One more question before I go pulling that panel off - if i already have an aftermarket 4 pin harness plugged into a factory connector will the 7 pin oem harness use that same connector (substitute for the 4 pin) or is there another one tucked back in there somewhere?
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Unread 07-19-2013, 04:49 PM   #12
dnuccio
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Quote:
Originally Posted by dcpnz View Post
Thanks SLOspeed

One more question before I go pulling that panel off - if i already have an aftermarket 4 pin harness plugged into a factory connector will the 7 pin oem harness use that same connector (substitute for the 4 pin) or is there another one tucked back in there somewhere?
what aftermarket harness do you have? AFAIK theres no aftermarket harnesses that use the factory trailer wiring plug.
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Unread 07-19-2013, 05:47 PM   #13
dcpnz
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Quote:
Originally Posted by dnuccio View Post
what aftermarket harness do you have? AFAIK theres no aftermarket harnesses that use the factory trailer wiring plug.
Ahh yeah - ignore my previous post. Sorry.
Its a Draw Tite. I didn't install it and a cursory look made me think it was plugged in but now that I've looked properly its actually spliced into wires directly adjacent to two grey connector plugs.

Back to taking the panel off to find the tow prep package factory wiring plug and searching for the OEM harness for a reasonable price I guess.
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Unread 07-19-2013, 06:42 PM   #14
dnuccio
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heres a diagram koreazj posted. i think its for 96-98 ZJs

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