[FireEngineMike]

I am afraid I am still a little dense troubleshooting the gas and temperature gauges. History: 1940 1-1/2 ton panel. I replaced the OEM gas sending unit with the one from Mac's. It gave readings that increased as I added gas to the tank using a 5-gallon can. Temperature gauge worked fine. Some time later I removed the distributor and spark plug wire assembly including looms to have the distributor serviced and new wires installed. I had to remove the temp sending wire (I have only a single one-terminal sending unit on the driver side) to get the driver side loom out. Ever since I reinstalled everything the temp gauge reads H and the gas gauge reads E. I checked the gas gauge by momentarily grounding a long jumper connected to the sending unit wire and the gauge read F. Both failures happened after I removed and reinstalled the temp sending unit wire. The temp sending wire has continuity to the gauge. Thoughts?