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Does 12-V Trailer Connector Circuit at 7-way on 2017 Ford F350 Remain Active With Vehicle Running


about the 12 vlt charge line on 2017 f350 or other fords you state that 12 vlt can be tested after you plug in a trailer and the brake peddle is pushed. does the 12 vlt remain on from that point on for charging a battery or to run interior lights???


Expert Reply:

Once the trailer is plugged in and the brake pedal is depressed, the 12-volt power circuit on the trailer connector will become active, and can be used for whatever purposes you wish. Keep in mind that this circuit can maintain a trailer battery, but it won't have the available grunt to charge a discharged battery. To fully charge the battery while the tow vehicle is running, you'll need a DC to DC charger like # 331-BCDC1240D for a 40 amp or # 331-BCDC1250D
for a 50 amp charger. If you look at the article I've linked for you, you can see more information about using a DC to DC charger.

expert reply by:
Mike L

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