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Old 08-01-2008, 07:25 PM   #1
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wiring hitch problems, any help?

I have a 97 wrangler with a U haul hitch. I called and the guy who does hitches is off until monday so I am trying here to see if I can fix it myself. The problem is that the blinkers work and nothing else on a trailer. No running lights no brakes. Also, as a odd coincidence my running lights and I think brake lights do not work on the back of the jeep. The hitch is wired with these little blue conectors that splice into the existing wires. Here is what I have:

Jeep wires -goes to- hitch wires

brown with red stripe-goes to -green
black -goes to- white
green with red stripe -goes to- yellow
black with red stripe -goes to- brown


The yellow and the green came loose and I am pretty sure they go back where I put them because part of the yellow wire was still in the connector. If I have anything wrong let me know. I tried taking the wires off one by one and reconnecting/splicing but no luck.

Any help would be great.

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Old 08-01-2008, 07:32 PM   #2
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make sure all your fuses on the jeep related to the brakes and towing are not popped. to figure out what wire does what you need to grab a meter and turn one item on at a time to see whats what. also make sure your bulbs are not popped on the trailer.

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Old 08-01-2008, 08:01 PM   #3
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Here is the color diagram for your jeeps Rear lighting harness.


Black/Yellow = Taillight or side marker light
Green/Red = Left Stop & Turn Signal
Brown/Red = Right Stop & Turn Signal

As far as the trailer wiring tapped into your jeeps harness ...

Make sure all the tap's are secure.
Make sure the plug is clean.


What type of trailer plug are you running? Standard 4 prong?
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Old 08-01-2008, 10:34 PM   #4
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For most trailer lights the color is this
Brown = marker/parking lights
Green = Right turn/brake
Yellow = Left turn/brake
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Old 08-01-2008, 10:41 PM   #5
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Quote:
Originally Posted by slf41002 View Post
For most trailer lights the color is this
Brown = marker/parking lights
Green = Right turn/brake
Yellow = Left turn/brake
x2 this is for a standard flat 4 prong if that is what you have. The white wire from the plug will be your ground.
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Old 08-02-2008, 04:39 AM   #6
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Hoppy makes a snap in t-connector style wiring harness. Fits in on passenger side wiring connection at rear of TJs. My experience with U-haul wiring is that the connections always work loose and you can never keep all of the lights working. Had to learn the hard way on a previous jeep
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Old 08-02-2008, 03:40 PM   #7
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Originally Posted by distortedtj View Post
What type of trailer plug are you running? Standard 4 prong?
Yes, 4 prong. From the trailer I have 4 colors, and I am pretty sure the white is ground. I checked the fuses and found the problem. Top left corner fuse was blown, I must have missed it. I got it fixed now.

Thanks for the imput. At least I know which one is the tail lights now.

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