No 12VDC Power

Not RP and I just double checked. Was working fine for several days. I took the inverter out to check in my garage but then realized it had a "special" 120VAC plug so tested in back in-place plugged into the back of the electrical panel. All 120VAC power works when plugged into shore power.. no problem there. So here's two more pieces of information that may be relevant. 1)The fuse on the inverter... one 40 amp fuse was blown, the other 30 amp fuse was found laying on the ground next to the inverter. Did I knock the 30 amp one out? Possibly... you know how they throw these things together at the factory (workmanship is a four letter word to production!) Both fuses are supposed to be 40 amp. 2) It rained since all his started. Can I check the positive cable at the batter to ground and see if I get continuity? A possible short related to the rain? Trailer is less than a year old.

BFL13 wrote:
He said it all worked for several days after he put the battery in so not RP.

I caught that but if by "all" he meant the (incondescent) lights were working, it could still be in backwards.

He said it all worked for several days after he put the battery in so not RP.

When the converter passed its bench test, where did the 120v come from? Is there 120v to it when in the RV? Anything else 120v in the RV quit working? (As in you washed it and popped a GFCI getting the outside receptacle wet?)

Is the resetting CB the "battery fuse" near the battery on the pos wire?.. If not check that too.

I always look for the - or NEG stamped on the battery case and make sure this is connected to frame ground. Trailers are normally BLACK for + and WHITE for - Frame Grounds but since those are also automotive cabling the color code might be RED for + Positive and - BLACK for Ground.

You may even find a RED WIRE connection on top of a BLACK WIRE Connection where the two worlds of TRAILERS and AUTOMOIVE items cross paths haha...

I had to replace my JENSEN CAR RADIO and right out of the box came with RED and BLACK WIRES... Where that connected to 12VDC was BLACK and WHITE color connections... Makes old timers turn over in their graves haha...

Finding the PLUS + and NEG - symbols stamped on the battery case helps me keep it straight for my setups...

If you find them reversed there are two FUSES in the power panel marked REVERSE POLARITY and are usually off to them selves like the the 40A fuses shown here. They will most likely be blown...


Google image

Roy Ken

Your battery is in backwards and the breaker is doing it's job.

Once you sort that you may have blown other fuses.

opnspaces wrote:
The clicking part sounds like an auto resetting circuit breaker. If so they are available at any auto parts store.

This!
Also, is there any chance the battery is hooked up backwards? The colors of battery wiring on RV's can be rather goofy sometimes!

The clicking part sounds like an auto resetting circuit breaker. If so they are available at any auto parts store.