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brucegwhite's avatar
brucegwhite
Explorer
Aug 29, 2020

Strange Electrical Issue

Greetings!

My rig is a 2007 Chateau Sport Class C.

On a recent camping trip I experienced the following:

I was plugged into the campground power.

Over a two-day period, the lights grew progressively dim. On the 3rd day, the water heater pilot shut off. We were leaving the next morning, so we just put up with it. In the morning, though, the fridge also had shut off.

Basically, all the hard-wired appliances were dead...but everything plugged into an outlet (like our microwave) worked fine.

I had checked to be sure that the campground power was good (it was). As a test, I fired up the generator and everything worked fine. Drove home, plugged into house power, and - lo and behold - the problem was gone! I had company stay in the RV for several days and the problem did not re-occur.

Until today. Now it's started again as I'm preparing to go on another trip. Lights dimming, etc. I'm pretty sure my coach battery is on it's last legs, but I don't understand how this would affect things when I'm plugged into house power.

I'm pretty good at fixing things, but a lousy trouble-shooter. Can anyone offer some suggestions?

Thanks!
  • jdc1's avatar
    jdc1
    Explorer II
    Or it could have simply been a bad outlet at the campground. You probably used a multi-meter to test the outlet at the campground? One end on hot, one on neutral? Those contact points might at the CG box could have been warn out.
  • What is the battery voltage indicated on your voltmeter? Measure direct on the terminals.
    Then measure the voltage in the 12v distribution panel.
    Post the results.

    Actually not at all a strange condition.
  • Yep converter dead and battery dead because converter not charging it.
  • Your converter isn't working properly to keep the battery charged and provide 12V power, and the loads are consuming the battery charge. The problem "fixed" itself because the house battery got charged from the engine alternator while you were driving home.

    If basic troubleshooting doesn't reveal something simple like a loose wire or a blown fuse or popped circuit breaker for the converter, it probably would be as well to simply replace it with a good multi-stage unit as I suspect the factory converter is a simple single-stage converter. A newer multi-stage one will recharge the batteries faster and be gentler on them once they are charged.
  • How did you start the generator with a dead house battery?

    The converter worked on gen but not campground shore power and it worked at stick house shore power for w while then quit again.

    Is the converter getting its 120v from a receptacle that is on GFCI that was ok with the gen but not shore power? But then what changed while on stick house power?---what did you do while "preparing for the next trip" that could have caused that?
  • Plugged into 120VAC gives you AC Power

    The fridge, water heater, lights etc NEED 12VDC to function

    Sounds like your converter/charger is failing and possibly that battery can not hold a charge (how's the battery water level....do you check it?)

    Need to test converter/charger DC output
    Disconnect battery pos cable
    Then with 120VAC input...converter should have 13.2VDC out at minimum

    Take battery to any Auto Parts Store and have it Load Tested.....FREE

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