4 way to 7 way wiring harness Question ? - Ranger-Forums - The Ultimate Ford Ranger Resource

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Old 03-10-2008
Thread Starter
Join Date: Mar 2008
Location: Winnipeg MB
Posts: 1
Icon10 4 way to 7 way wiring harness Question ?

I was wondering where would I attach the Black (12v) wire on the 7 way wire harness I bought for my 1999 Ranger? The rest is easy just plug the 4 way to the other 4 way, and there is no brakes on the camper I'll be towing so the blue wire isn't neededany help would be apreciated.

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Old 03-10-2008
Join Date: Feb 2008
Location: B, IL.
Posts: 16
Google is your friend.

This is from a Toyota Tundra forum but it will answer your question.


The black wire charges your trailer battery, if you have one.
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