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Old 04-15-2016, 09:30 PM   #1
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Charging from my truck NEED HELP PLEASE

So I went to my trailer the other day and my battery was dead as a nail. The tongue jack did not move. When I connected to my 2015 F-150 there was still no power to the trailer or Jack. Is there something I am missing? Do I need to connect something in the truck or does the trailer cable not charge the battery? I see a lot of people on here mention that they can connect their truck to the camper to charge the battery but I do not see how this is possible. What am I missing here?

I guess the other question I am asking is does the 7-Way RV Trailer Connector charge your RV battery?
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Old 04-15-2016, 09:39 PM   #2
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Welcome to JOF

Yes, the TV's 7-pin connector will charge the TT battery but at a very slow rate (1amp-2amps). Using jumper cables from the TV battery to the TT battery (if possible) will charge the battery faster.

Check your battery terminals for a solid connection......, I'm sure others will chime in with additional info.

I assume that your TV's 7-pin connection has been connected to your present TT before and it functioned properly.

Bob
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Old 04-15-2016, 09:42 PM   #3
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Welcome to JOF

Yes, the TV's 7-pin connector will charge the TT battery but at a very slow rate (1amp-2amps). Using jumper cables from the TV battery to the TT battery (if possible) will charge the battery faster.

Check your battery terminals for a solid connection......, I'm sure others will chime in with additional info.

Bob
So when I connected my truck to the trailer the tongue jack should have started working off the truck power right? It did not budge when I connected the 7 pin to my F-150 and my truck identified the trailer. This is weird.
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Old 04-15-2016, 09:43 PM   #4
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I bet there's a blown fuse or something because you should be able to use the tongue jack without even having a battery installed. Connecting to your truck, if it's running should give you instant power.
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Old 04-15-2016, 09:46 PM   #5
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I bet there's a blown fuse or something because you should be able to use the tongue jack without even having a battery installed. Connecting to your truck, if it's running should give you instant power.
This was my thinking as well. IDK what it is doing.
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Old 04-15-2016, 09:54 PM   #6
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I know on mine there's a fuze just off the jack that blows very easily. If I extend or retract even a tiny bit to much. Worth changing it out and trying that.
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Old 04-15-2016, 09:55 PM   #7
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So when I connected my truck to the trailer the tongue jack should have started working off the truck power right? It did not budge when I connected the 7 pin to my F-150 and my truck identified the trailer. This is weird.
There is a fuse in the trailer's tongue jack power supply line. If the jack is over extended (in either direction) it blows the fuse. This is the usual problem.

Also, I've read on this forum that some vehicles have a fuse in the circuit that supplies 12v power to the vehicle's 7-pin connector. Some members say that their fuse was not installed from the factory.

IMO, those fuses would be the first things to check.
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Old 04-15-2016, 09:58 PM   #8
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So when I connected my truck to the trailer the tongue jack should have started working off the truck power right? It did not budge when I connected the 7 pin to my F-150 and my truck identified the trailer. This is weird.
2015 F-150, right? Seems to me I've seen several threads about issues with the necessary relay not being installed, although it comes with the truck and is usually found in the glove box.

Also, did your control panel in the truck show that the trailer is connected? It should! Not sure you'll get anything until it does. Situation calls for reading the manual.

See this thread:

https://www.jaycoowners.com/forums/f3...150-34254.html


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Old 04-15-2016, 10:00 PM   #9
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Another quick fix might be trading that Ford in for a GM!
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Old 04-15-2016, 10:09 PM   #10
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Another quick fix might be trading that Ford in for a GM!
Why would you want him to trade down? LOl
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