Quote:
Originally Posted by Van the traveling man
Did you ever resolve this issue? I just started having this exact problem. I'm at a loss. How can the DC work when on shore power, but I lost an entire leg when disconnected?
It looks like my batteries aren't recharging either. Think replacing the automatic battery charger will help? I
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Sounds like your red 50A self resetting circuit breakers are bad.
No DC power from battery. Good when on Shore power or connected to truck via 7 way cable.
For a 5th wheel RV...
Take a multimeter. On shore power, check each post of your red 50A self resetting circuit breakers near your batteries. They should all read the same (about 12.4vdc).
Now remove shore power. Check them again.
Which ever one is NOT showing 12vdc on the post, it is bad. Replace it.
Note: charging is also possible via the 7 way cable from your tow vehicle. It could be supplying power on the same (good) side of the breaker.
Buy Bussmann 50A self resetting circuit breakers. Very reliable. You can get them at your local auto parts store.
Carl wrote the Perfect 12vdc troubleshooting flow chart:
https://www.montanaowners.com/forums/showthread.php?t=86323
While you are there, if you have hydraulic slides and Level-up, put the hydraulic system on its own 80A circuit breaker as in the picture. Lippert put out a TSB about this. You can do a search on the forum for more info.