Thor Forums

[Beau388]

The later model coaches usually have a battery interconnect module (BIM) rather than a BIRD. If your engine's alternator charges the house battery then the BIM is probably good. Make sure you have the master power on any time you expect to charge the batteries whether or not you are using the coach. Next make sure the circuit breaker for the charger (it in the power center) is on. Lastly there is a 50 amp circuit in the battery compartment that connects the house battery to the charger. It can be check by removing all 120 volt power from the coach and see it the interior lights still cone on. If they do the circuit breaker is good. With the master power on and the charger on, use a volt meter at the house battery to check that you are getting 13.1 to 13.5 volts if not you could have BIM problem.