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Old 11-30-2017, 11:16 AM   #11
ctbruce
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Just keep on mind that the gauge of the charge wire from TV to trailer is large (small wire). You won't get a lot of current if you are trying to charge an empty battery.

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Old 11-30-2017, 11:30 AM   #12
JRTJH
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All Ford trucks equipped with a "factory installed 7 pin connector" have an ignition controlled relay that will not allow the tow vehicle to supply power to the battery charge line in the 7 pin connector unless the ignition switch is turned ON. This was true with my 1987, 1989, 1993, 1995, 2005, 2010, 2013 and 2015 Ford trucks. Some other manufacturers have this feature, some trucks don't.

For me, it's a great thing because it prevents the possibility of a dead truck battery after stopping for an evening. It was even more critical when the trailer had a 12 volt refrigerator or someone left lights on in the trailer (back when they were all incandescent). Back when (before Ford made the change) parking for a couple hours and not realizing that the refrigerator was on or that a kid (or forgetful self) left the bathroom light on, could mean finding someone with jumper cables before you could get back on the road.
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Old 11-30-2017, 11:33 AM   #13
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Quote:
Originally Posted by B-O-B'03 View Post
...I found out that Ford does not install the fuse or relay for the trailer circuit, that is supposed to be done by the dealer.

I found the fuse and relay, in a bag in the glove box, while researching why the truck was not providing power to the camper.

YMMV

-Brian
It's been that way with the F150 since 2005. The SuperDuty trucks do come with the fuse and relay installed in the underhood fuse panel.
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