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I've had an issue develop with our coach. It seems I am not getting a charge from either the automotive alternator or the on board Onan 5.5 KW. Xantrex remote status indicator shows 11.9 volts with both of these running. Some charging voltage must be getting through but not getting to 13+ range. After a discussion with Thor CSRs and looking at the wiring diagrams, I plan to conduct some tests.

1. Check voltage at e-start solenoid after disconnecting from house batteries - should be the same as voltage output from automotive alternator (13+ range).

2. Check voltage at inbound side of 100 amp breaker (with breaker open) while running generator. Voltage should be 13.2, 13.6 or 14.2 volts dependent on convertor state.

3. Run load tests on individual house batteries looking for a dead cell battery.

If I have thought through this process correctly, I should find the issue. Either a bad e-start solenoid, converter and/or battery.

I've uploaded the wiring diagram.

Fellow DIYers, please read the above and look at the attached pdf and give me your inputs.

Thanks.