12 volt system cuts out

[daveandcarol]

My entire 12 volt system will just 'cut out' and stop working. Then, later, it comes back on again as if nothing ever happened. This has happened three or four times now. Any suggestions where to begin looking for the cause?

[Johndale]

Does it do this on shore power or just batter power.
If you have a 110-12 volt converter on the out put side is 2 thermo breakers in most cases some may have 1.
https://www.ebay.com/itm/311291474802
They look like this. If it is direct from the battery they normally have a current limiter. A fuse big one flat. Hope this helps and hope I don't get beat up again.

[Lt Dan]

I second what Johndale said about the thermal breaker. Our friends had a Coachmen that kept doing the same thing. We searched and searched and finally found a hidden breaker like he posted a photo of. There was a loose connection on the breaker that was causing heat buildup, tripping it until it cooled.

[daveandcarol]

Thank you. Good place to start looking.

Only does it on battery power, not on shore.

[jacwjames]

For all of your 12 volt system to cut off and then on you have have a larger auto reset circuit breaker in you main wiring.

I have one in mine, it looks like this
Klixon 120Amp Circuit Breaker Price Is for 1 | eBay

It is wired between the house batteries and the 12 volt system.

There is a chance that the circuit breaker itself could be failing or there is something else pulling a lot of amps.

[Old Bounder]

The Pace Arrow did not use thermal circuit breakers in the DC path from the batteries to the distribution system. However, there will be two manual reset circuit breakers (inside the BCC box) between the batteries and the distribution panel.

The most likely cause of your problem, in my opinion, is faulty contacts inside the Aux/House battery disconnect solenoid.

The next time it fails, try toggling the Disconnect switch by the entry door (OFF then back ON).