I picked up this 21 foot Fun Runner Toy Hauler. The battery box has two wires that I don't know what to do with. The two (white) wires are heavy gauge and in the same sleeve as the main hot lead.I can plug the 110 in and it looks like everything works. I can run it off the battery and it looks like everything works. When I have the truck hooked up to the plug, the interior electrical does not work but the lights do work. In the attached picture I don't know if the two white wires hook up to + or -.

I was distracted by the hotties below your picture.

They may be wires coming from the converter that charge the battery when plugged in. Typically the ground is run through the frame (like a car) so chances are those are both (+). If you have a multimeter, set it to ohms and see if you get any continuity between either of those wires and the frame, just to rule out them being grounds. You may want to crawl around a little and see what you can find out before connecting them. Or maybe call the guy you bought it from and ask him?Oldman....ya gotta lay off the hooch this early...what "hotties below the picture?"

Burbman, I'll hook up a multimeter to it this afternoon. The battery charges when plugged in to 110. Not when plugged into the truck.I'll hook up the multimeter to it when I get home. It got REAL hot when I tried to connect that red connector to +.Thanks for your help.

Commonly in RVs, white is ground. Chase those wires to see where they go. If it got hot connecting it to +, then it is a dead short to ground. Hot diggity!

BurbMan wrote:Oldman....ya gotta lay off the hooch this early...what "hotties below the picture?"When OP first posted, his url was different...would not display. I went to his url and saw 4 hotties below his picture.

12 Volt Batter Hookup Question | Good Sam Community

13 Replies

Billy_Hill
Explorer
Feb 12, 2015
Burbman, I'll hook up a multimeter to it this afternoon. The battery charges when plugged in to 110. Not when plugged into the truck.

I'll hook up the multimeter to it when I get home. It got REAL hot when I tried to connect that red connector to +.

Thanks for your help.
BurbMan
Explorer III
Feb 12, 2015
They may be wires coming from the converter that charge the battery when plugged in. Typically the ground is run through the frame (like a car) so chances are those are both (+). If you have a multimeter, set it to ohms and see if you get any continuity between either of those wires and the frame, just to rule out them being grounds. You may want to crawl around a little and see what you can find out before connecting them. Or maybe call the guy you bought it from and ask him?

Oldman....ya gotta lay off the hooch this early...what "hotties below the picture?"
2oldman
Explorer II
Feb 12, 2015
I was distracted by the hotties below your picture.

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12 Volt Batter Hookup Question

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