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Old 07-21-2018, 10:53 AM   #1
New Camper
 
Join Date: Oct 2014
Location: Tn.
Posts: 4
Electric Tongue Jack

Hello all,
Just wanted to know something in regards to the power for these electric tongue jacks. I was under assumption that these jacks were powered by your battery and also when you hook up your trailer plug. I have a 2015 F250 w/ factory towing package. I was told by the RV dealership, I do not have 12 volts coming out of my hitch receptacle. Thought that was hard to believe. If its a truck fuse/relay that blown or not working, i would have other problems, more things wouldn't work. The reason this all started was my electric tongue jack quit working, my battery died on me. It was a few years old, but i thought if i hooked up my trailer plug to my truck, it would power the hitch. A little confused about all this. Any input would be appreciated very much.....tried charging battery and it wouldn't hold charge. New battery and my jack works fine...also was told that some motors on these jacks, some of them have a brake, which will not let you manually raise or lower the jack until you take away all power to the jack, like pulling the fuse or disconnecting battery lead or leads. Thanks
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Old 07-21-2018, 11:32 AM   #2
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Join Date: Sep 2012
Location: PA
Posts: 4,440
You must install the relay under the hood to activate the plug wire. If you do not have one, your local Ford garage will have it. Mine was in the glove box when I bought the truck.


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Lehighton, Pennsylvania

'13 Cruiser Patriot 335SS - '13 Ford F150 SCREW - PullRite Superslide - Roadmaster Active Suspension
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Old 07-29-2018, 07:46 PM   #3
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Join Date: Jul 2018
Location: Minnesota
Posts: 21
Fuse and relay

I bought my F-150 second hand, and apparently the last owner didn't use the 12 volts at the hitch. I found the fuse for that circuit and the relay missing. Added them both, it worked fine.
My owner's manual had the fuse and relay layout, and pointed me to the right locations on the fuse panel.
That power is very useful, it provides 12vdc power to your RV, and helps to charge your RV battery with your truck is running.
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