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Old 03-12-2015, 09:33 PM   #11
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Problem seems to be between plug and trailer battery
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Old 03-13-2015, 05:15 AM   #12
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You will find the bad ground either in the box already mentioned or in some cases that bundle of grounds has a single pigtail that connects to the frame somwhere close to your ball on the A frame. Electrolysis always eats that type connection up.
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Old 03-13-2015, 06:46 AM   #13
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I carry one of these 7-way Trailer adapter n RV TOOL BOX that takes the guessing out of what is at fault. The TRUCK SIDE or the TRAILER SIDE... Got mine from AMAZON...



When I got my 2010 FORD Truck it has an unmarked envelope in the glove box that had a 12VDC FUSE and RELAY. Finally figured out these were for the TRAILER TOW connector. The FUSE and RELAY had to be installed in the TRUCK FUSE panel The 12VDC would only be ON when the truck ignition key was ON. My truck also had individual fuses for the DOT Safety lights.

This did not however affect the DOT safety lights - Only the truck 12VDC charge voltage for the trailer battery.

Roy Ken
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Old 03-13-2015, 09:06 AM   #14
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Quote:
Originally Posted by dennis b View Post
Not concerned right now about TV just trailer plug which is hooked up to good battery
If the TT is not on the ball, you do not have a ground. Hook the TT to the TV after confirming that you have power at the socket. Center post on the TV socket is the ground. Other ports are for tail lites, turn, marker lites and brakes. If no power thru the socket, you have a problem somewhere on the TV. If yes, see my previous post and check in the junction box.

Problem solving is a series of steps that isolate the problem. By learning what it is and what it isn't and by going step by step thru the system you will eventually find the fault.
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Old 03-13-2015, 09:10 AM   #15
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If the "good" battery you mention is the TT house battery, that battery has nothing to do with your TT nav lites. Why are you avoiding hooking up to the TV?
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Old 03-13-2015, 09:56 AM   #16
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If the TT is not on the ball, you do not have a ground.
X2! I learned this the hard way many years ago when I had a pop-up. I was going through the same thing as the OP, when all I had to do was hook up like I was ready to travel, and guess what? Everything worked fine.
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Old 03-13-2015, 09:58 AM   #17
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Here's a link to Roy's nifty tester!
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Old 03-13-2015, 11:33 AM   #18
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PROBLEM FOUND!!!!!!!!!!!!!!!!!!!!!!!!!


Fuse socket not making good connection!


Thanks to all that responded! I gotta put Roy's tester on my want list.
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