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.

Thanks,
Gord.

 

Google is your friend.

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

http://www.tundrasolutions.com/forum...ke-controller/

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