B737doc
Well-known member
1992 Damon Challenger Motor Coach. Onan 4000 Generator using two 12 vdc batteries wired in parallel (they share a common ground, but 2 different wires coming off positive posts). Removed the batteries for winter storage in my garage and placing them on a trickle charge. Installed batteries in order to start generator, relay clicked a few times, then nothing. I checked voltage at the relay and was reading same as battery voltage (13+ vdc). Jumped relay, still nothing, not even a click now. Started main engine, selected house switch to the "ON" position, generator started right up. Selected house switch to "OFF" position, generator dies. Re-configured to previous condition, generator started up again. Left in this condition for 10 minutes then selected house switch "OFF" and generator continued to run for 20 seconds, then cut off. I don't see how one of those batteries are THAT dead all of a sudden, and showing 13+vdc....but that's really all that makes sense.