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Old 07-01-2015, 10:31 AM
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Strode Strode is offline
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Join Date: Nov 08, 2011
Location: Littleton, Co
Posts: 2,289
Just to update this thread, and I have moved it to the electrical archives.

My 82 Cherokee came with the trailer towing package, and a 7 pin factory trailer plug.

As far as I can tell, when you have the trailer package with the little black box of 4 relays, there is no way to just add a 4-pin flat connector. The lights will work, the turn signals will work, but brake lights on the trailer won't light.

You need to either go thru the factory 7 pin plug using a flat 4-pin adaptor, or you have to add relays like Tony mentioned. I went thru my box and made sure all the relays worked, and used an adaptor.

You must have the 12 gauge bullet connectors, one in and one out, hooked to a hot source. Otherwise, you will hear the relays working, but nothing will come out of the 7 pin plug…. (that was my trouble)
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My build thread: 1982 Cherokee Laredo

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