I think I found the wires to the transfer pump and sending unit on my motorhome inside of 1/2" black conduit. It's in the front, routed over that top corner and does not come back out the other side. It contains 3 wires. Two of them the same guage and a black that's about a 12.
So, I drove it for a bit and burned about 6 gallons of gasoline. I estimate that there 31 gallons left. I don't have the facility to store a 55 gallon drum, even empty. So if I drop the tank, it's all got to get burned.
But just in case I don't have to replace it, I've invented a new diagnostic proceedure for the wiring using a fused lighter plug in a portable battery jump box. This way I can get 12V DC while controlling the amperage and satisfying Olm's Law.
This part is hard to get because of the age and size tank that it has. The tank is bordered by steel beams all the way around. The other locations another one could install in are occupied by the motorhome's componentry. Therefore, the replacement has to be the same width and length or less, but I could spare some height. With all that said, there's old wiring all around and a found could be bad for all I know. So, if the current pump can work, I'll pursue that avenue first.
While I was underneath, I spotted a wire to the trailer hitch lighting. It was in a plastic Y branch connector and the wiring at it was unshielded and fraying... barely holding on. This could be my reverse light that's not getting any power?
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