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Old 05-20-2016, 09:31 PM   #1
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Help! Power from tow vehicle to trailer

Okay help me out. I have a 2013 f150. I connected all the required fuses required to supply power to trailer. But if my trailer battery is dead, I still don't have power to work the tongue jack. I'm forced to use a jumper box. I've been told that you should have full power from tow vehicle if connected. Am I doing something wrong? (Besides having a dead battery to begin with). I already added a battery shut off and a solar panel charger.
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Old 05-20-2016, 09:34 PM   #2
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Make sure the fuse is not blown. There is prob a fuse or breaker (looks like a silver box about 1" x .5" with a black nub) on the one wire. Also my experience it a DEAD battery will not be charged by the TV because they use such a small wire it does not carry the needed current.
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Old 05-20-2016, 09:36 PM   #3
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Most times there is an inline fuse between the battery and the jack... usually in a little plastic case/cocoon type thing. Check that fuse. If that doesn't help, loosen and tighten a bolt that holds the jack on the trailer. That's where the jack motor gets its ground.
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Old 05-21-2016, 10:30 AM   #4
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Turns out it was the fuse. Thx guys. Fuse looks weird. Almost like the connection on inside is corroded. I attached a closeup pic. Click image for larger version

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Old 06-01-2016, 02:00 AM   #5
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Yes, I know I'm late.

When I bought my TT new, the issue of a power tongue jack was my first concern so I bought a bottle jack that can be used in a pinch. Turns out the bottle jack can also be used to jack up the trailer in case I need to change a tire.
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