12 VDC loss
No power in the cig lighter socket at the dinette table, no porch light, no stairwell light, and the aux battery switch no longer has loud switching noise. Checked all circuit breakers and fuses tw...
Forum Discussion
Dead Aux Battery. Start engine. Make sure your on aux power via switch ON. Does porch light come on when switched on. If not then likely isolator has failed. It is supposed to direct the engine alternator juice to the engine battery and when the engine battery no longer needs charging it is supposed to send the alternator power to the Aux Battery. The isolater default position is charging the engine battery so when it fails the engine battery will always get the charge and never provide charging to the Aux Battery. Isolator is usually under the hood and is an add on by the motorhome manufacturer. Not a very expensive part. Total cost will be more in the labor to install.
