westend wrote:
It sounds like you have eliminated the circuit protection by bypassing the circuit breaker and have the isolator miswired/failed. This, along with a coach battery that is depleted, would be the cause of the heat.
Yes, isolators do go bad. There is also good probability that you will never get 50A from the alternator to the coach battery through a diode isolator when everything is wired correctly.
there were 2 50A circuit breakers in the one line from isolator to rear battery. One was bad (no through current) so I bridged it since the the other one might should have protected. It may be bad as well since it did not trip.
Thanks for the reply
