Quote:
Originally Posted by coyote251
Hi All,
...I was under the understanding that when plugged into AC power the converter switched it to DC to run the DC devices. If this is the case why would it not work on battery but worked when plugged into shore power?
It seems to me like this is a simple switch somewhere that isn't making, is there any switches in the trailer or in the converter that locks out DC power? If so, again why would it work on AC?...
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The converter does indeed CONVERT Alternating Current to Direct Current.
When plugged in, everything working is a good sign.
This just means there is a fault somewhere between the battery and the converter. The reverse polarity fuse is a good guess... but it sounds like the truck is sending a charge to the battery while driving, or else you'd have even less than 12.6 VDC at the battery. (so... if you're getting current from the TV the battery is probably not wired backwards.)
My guess is the battery is properly grounded, (based on the 12.6 V test)
I'm thinking a loose wire. you need to trace the wire from the battery back into the camper. Open the junction box and check for loose wire nuts.
Next, keep manually tracing the wire back to the converter, physically and visually follow the wire.
The only lock-out switch that usually exists is a pressure switch that kills the furnace when the sink cabinet is folded down for transport. That push button switch can get smashed and broken if the kitchen sink comes down too hard.
If you find no loose wires or any fuses that you weren't aware of, then the converter itself might have a problem.