trailer wiring help for truck
05-06-2009, 09:32 PM
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Location: vero beach florida
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trailer wiring help for truck
i have a 20' foot enclosed trailer and i need the auxilary or accessory wire hooked up to 7 pin. does anyone know how to hook it up? there is a accessory (yellow) wire behind the plug but it is not connected.
05-07-2009, 10:54 AM
#2
05-07-2009, 06:39 PM
#3
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On My other ford! It only had the 4 pin connector. I needed the round connector. Ford sells the harness w/plug.
I looked under my truck and I followed the wires from the plug to the frame area. (In the left rear area) It was plugged into the main harness that had all the wires.
I purchased the new plug/harness which gave both setups in one, as on the factory towing packages.
I unplugged the old harness and unbolted the plug. The piece came off as a whole. I then plugged in the new dual plug assy. into the harness and installed the plug by my hitch.
Then I had picked up the new relay for the hot wire (charge) to work. The Ford parts guy also gave me a diagram to show where the relays went.
I wanted the brake controller also.
That was another relay and a small 4 or 5 wire harness (factory) from Ford.
All this was easy to install 30 min total time.
The biggest expense was the trailer brake controller from the trailer Supply place
