Recommended 12V Trailer Connector Wiring For Constant Power On 2015 Ford F150
Updated 08/27/2020 | Published 07/26/2017
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Question:
Ford knows they have a problem with the 7 pin trailer connector not supplying a constant 12v for interior trailer lights and other items. I bought this truck specifically for towing different trailers some of which have interior lights or the need to charge a battery in a camper. If you could help with a solution, you would have many F150 customers coming your way.
asked by: Mark
Helpful Expert Reply:
There is a very easy solution, but it means bypassing the Ford electronics. You can run a 10 gauge wire like # 10-1-1 directly from the battery, through a circuit breaker like the 40 amp In-Line Circuit Breaker - Perpendicular Mount Bracket # 9510, and directly into your 7-way trailer connector. This is the pin at the 1 o'clock position when looking directly at the connector from the front, so from the back of the connector it would be the 11 o'clock position.
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40 Amp In-Line Circuit Breaker - Perpendicular Mount Bracket
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Andy M.
8/14/2020
I'm going to have to perform this same fix, can I tie into the existing batt. wire at the connector with the larger wire without any adverse effects on my truck electronics or trailer monitoring software?