Where to Find the Orange 12 Volt Power Wire for Wiring a 7-Way on a 2010 Ford Expedition
Question:
i have all tekonsha brake controller,3035-p and90885 7pin/w/4pin ,but i cant find the orange power line for power to the trailer. mine seems to stop at connector c-139 on drivers side fenderwell in engine compartment according to my 2010 expedition el wiring diagram. have an answer?
asked by: John L
Expert Reply:
Follow the 4-way trailer connector wires from the trailer connector to the front of the vehicle. These wires connect to a factory plug along the frame rail, usually on the driver's side, between the back tires and the rear bumper (see attached picture). The factory plug should be mated to another connector which has wiring that continues back toward the bumper.
There are more wires coming from the front of the vehicle than there are coming out toward the 4-Way plug. Ford wires the front of the vehicle as if it will be manufactured with a 7-Way plug, so all the 7-Way wires are run to this connector on the frame rail. This allows a 7-Way wiring harness to simply plug in line with the wiring coming from the front of the vehicle. If the vehicle were made with a 4-Way plug, it would plug into the same connector. Because a 4-Way plug would not require them, the additional wires are terminated at the pictured set of mated connectors. In that bundle is the orange wire you are looking for.
Check out the FAQ article I attached to the right for more info.
Product Page this Question was Asked From
Pollak Replacement 7-Pole, RV-Style Trailer Connector Socket - Vehicle End
- Trailer Wiring
- Trailer Connectors
- Vehicle End Connector
- Plug Only
- 7 Round - Blade
- Pollak
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