different RV's use different designs to provide power to or isolate batteries from each other or from the van
relays are usually easily replaced
one cause of internal damage can be arcing and pitting of the contacts due to low voltage
this can cause intermittent operation and never gets better on it's own
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Mike
2006 Pleasure Way Lexor TD on a Chev 3500
Previous: tent strapped to Electra-Glide
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