Trailer Wiring Harness
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Joined: Jul 2009
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From: NJ
Trailer Wiring Harness
picked up the new 2010 F250 Crew short bed Lariat FX4. My 7 pin trailer hookup does not work. Plugged in the tested and there's no power to it. I checked all of the fuses. Cannot tell whether the relays are good unless I buy new ones. Before I waste a day at the dealer, is there something I am missing?
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Joined: Mar 2007
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When you say no power to it, I am assuming that you turned your headlights on, and checked for the corresponding pin to be powered, and blinkers/ pin intermittent power. corect?
You wont have power if the truck is just sitting there off.
It seems strange that all the circuits would be dead unless it was disconnected?
You wont have power if the truck is just sitting there off.
It seems strange that all the circuits would be dead unless it was disconnected?
Posting Guru
Joined: Mar 2007
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something is disconected somewhere. I would also check fuses, but if the lights work on the truck then???
Turn on the lights and trace back with a probe where the power stops ior starts. Thats all you can do. I wouldnt think they would be on a relay? but I might be wrong
Turn on the lights and trace back with a probe where the power stops ior starts. Thats all you can do. I wouldnt think they would be on a relay? but I might be wrong
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From: Millersville, MD
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From: NJ
Update: I pulled the plug receiver to check the wiring. The harness actually plugs into the rear of the plug receiver. It was heavily greased up with a vaseline type gel. I pushed the harness on tightly until it snapped into place. My trailer lights are now active. Usually the wiring harness is hard wired to the plug receiver. This is why I never thought to check it.
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