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Old 07-16-2012, 09:52 PM   #1
Junior Member
Join Date: Nov 2010
Posts: 13
Battery doesn't work unless connected to house or TV

I have a Fun Finder X-139, the smallest model. I have one battery I keep on a trickle cell charger all the time except when I'm camping

If the battery is hooked up to the trailer, and either:

RV hooked up to house or campsite current
Trailer electrical hooked to TV for towing, like for lights, turn signal, etc...

The RV interior lights work. But if the battery is connected without an external hookup, either house current or TV, then the interior lights do NOT work.

The battery is fine. It was checked at Batteries Plus. It is fully charged and holds a charge fine.

It is hooked up to the trailer fine. Positive to positive, etc...

This will be an issue if we ever go dry camping.

What kind of things should I look for to solve this problem?

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Old 07-18-2012, 03:01 PM   #2
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Fleetwood Owners Club
Join Date: May 2012
Location: NC
Posts: 1,682
You have a disconnect off or a fuse blown that unit only has a handful of lights and not much wires or circuits. it's something simple also see if there is a circuit breaker on the POS line coming in from the battery. Reason it works when plugged in to 120V it works off the converter, and when hooked to the truck it's feeding off the 12V charge line
Mark Anderson - Nebo NC - western NC - RV Restoration tech - 9 Doggies - Outdoors person
1990 33ft Wilderness Cimarron 33X
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