Recommended 12V Trailer Connector Wiring For Constant Power On 2015 Ford F150

Updated 08/27/2020 | Published 07/26/2017

Products Featured in This Question

40 Amp In-Line Circuit Breaker - Perpendicular Mount Bracket

(101)

$9.98

10 Gauge Wire - Blue Primary - Per Foot

(109)

$1.90

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.

expert reply by: Jason S

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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?

Jon G.

8/27/2020

Maybe? In all honesty it would be way easier to just slap a ring terminal on the end of that 10 gauge wire to connect it to your vehicle battery. This way everything is separated out and you won't be touching any initial connections from your OEM wiring.