Joe

[Joe]

Have a 1995 Xplorer Class B. Sometimes when I put refrigerator on 12 volt while driving down road. The house battery does not charge. This it what panel light indicates. As soon as I turn fridge to gas or shore power. The house battery indicator light goes back to green. House battery is about 2 years old. Problem with fridge on 12 volt, house battery or indicator light faulty?

[booster]

Originally Posted by Joe

Have a 1995 Xplorer Class B. Sometimes when I put refrigerator on 12 volt while driving down road. The house battery does not charge. This it what panel light indicates. As soon as I turn fridge to gas or shore power. The house battery indicator light goes back to green. House battery is about 2 years old. Problem with fridge on 12 volt, house battery or indicator light faulty?

The lights work off the voltage seen in the system so it is likely that when you turn the frig to DC, it is pulling enough current to drop the voltage enough to not be charging the battery. If all is original, you probably have an isolator the the coach that is dropping alternator voltage by .7 volts and not a lot of amps available, so a bit of drop would be expected. Best would be to get a voltmeter on it before and after and see what the voltages really are, so it can be determined if it OK or not.

[Joe]

Well the batteries not charging by trucks alternator or shore power via converter. Thinking it must be isolator under hood. Bad placement directly under truck battery and is very rusty looking. Both batteries can be charged via portable charger. Any thoughts?

[SteveJ]

Originally Posted by Joe

Well the batteries not charging by trucks alternator or shore power via converter. Thinking it must be isolator under hood. Bad placement directly under truck battery and is very rusty looking. Both batteries can be charged via portable charger. Any thoughts?

The isolator should not be in the circuit for charging from shore power.

I would remove and abrasively clean all battery cables and the ground connection to eliminate that as a possible problem. Don't just look at them and declare them OK.

[Joe]

Well, think I am back in Busness. Had repairman come to campsite and change battery isolator. House battery started charging but truck battery still not holding a charge. Wound up st Camping World in Kissammee Florida. Tested battery for free and found it was bad. This after Advanced Auto said it was good and I had another problem. All working now thanks to great service guy at C.W.