Quote:
Originally Posted by Bill
If the battery doesn't put 12 VDC into the trailer, but when you hook a jump pack onto THE VERY SAME BATTERY TERMINALS, then it would seem that the battery must be the problem. Since you had problems with the ring lugs that attach to the battery, I suppose the problem could be an intermittent connection there, one that makes or breaks when you disturb the wires. Or it could be an intermittent connection in the fuse holder as you move the connecting wires.
Bill
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Welp, I wish I had more experience trblshooting 12VDC trbls. With all connections/jumpers disconnected both batteries tested at 6.15VDC. So apparently the batteries are charged. And yes, the jumpers are connected as in your sketch for series.
I went through all of the connections and jumpers scraping them down to metal. The jumpers test good for continuity with the ohmmeter, as did the ckt breaker.
The ground lug connected to the streetside tongue was heavily corroded, as was the white wire connected to it. I filed all that clean, dielectric on all connections.
I'm running the gen now plugged into the trailer, we'll see what happens.
EDIT: Cleaning the ground lug got the furnace running overnight. Still concerned that the white wire has some corrosion between strands, so added a 10AWG jumper.