I have a factory installed trailer hitch and 7 pin wiring harness installed on my 2013 Dodge Grand Caravan. I have power to the plug but when I hook up my trailer none of the lights work. When I attach the trailer to another vehicle everything works fine. Have you ever heard of this problem.
Trailers ground themselves through the ball of the trailer, so no additional wiring needed there. Its runs through the white wire on the trailer side of the harness. It gets bolted to the trailer frame with a self tapping screw.
It's a small minivan why are you using a 7 plug wire. My guess it's wired up wrong. Be sure to check your not trying to haul a trailer that's to heavy for your van to tow safely. 4 wires would be all your van should have. 7 plug harness are for trucks with electric brakes and made to tow over 5k pounds. Your van may only be rated to tow 1500 pounds.
Some van don t have a ground wire. hook up to trailer put jumper cables to frame of trailer and van if works install a ground wire plug
SOURCE: Hooking up Trailer lights
There should be a tail light connection behind the left light assembly, where the harness adapter plugs in.
SOURCE: 1996 Dodge Ram Factory Trailer Wiring Schematic
all you need is a cheap continuity tester, any one to help tap on the brakes..7pin is just like the 4 pin w/extra power wire for acc.lites,electric brakes.when you buy the 7pin rec.,comes w/wiring schematic standard to all trailer rec.- you can do it..kev-mn.
SOURCE: driver side park lamps not working
check fuse # 2 in the relay box up front and look for a "park lamp relay control" in the control module.
SOURCE: Wiring diagram
If you are going from a 4 pin on your trailer to the 7 pin on the truck. You need to go to parts store or a department store (ex Wal Mart) and look in trailer section and find the adapter. Thats what I did. Also Remember if your lights don't work on trailer, check the plug to make sure its tight or check the fuse under your drivers side rear seat for that fuse box.
SOURCE: Wiring problem for 2005 Pathfinder trailer hitch
Sounds like the converter is bad. Go to http://www.etrailer.com/faq-wiring.aspx and check the testing section. Hope this helps.
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