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Brake Controller Wiring for 7-Way Trailer Connector # 30717 on 2010 Ford Expedition  

Question:

What size wire should I use to connect the blue brake control wire to the vehicle factory wiring? 2010 Ford Expedition. Where is the factory wire? I see a capped wire where the 4 pin goes into the factory harness.

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Helpful Expert Reply:

For your 2010 Ford Expedition, the Adapter 4 Pole to 7 Pole Vehicle End Trailer Connector # 30717 will use 10 gauge wire # 10-1-1 sold by the foot to connect to the blue brake controller output wire. The factory wire is along the rear frame rail.

You can then use a brake controller like the Prodigy P3 # 90195 and custom wiring harness # 3035-P to complete your trailer braking system. I've attached some videos to assist.

expert reply by:
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Jason S

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