Temp & fuel gauges - what am I overlooking?

Super-Cuda said
Bob , are the gauges now working properly?

Yes they seem to be working outside the car using a 100 Ohm resistor and the temp sender w/ heat gun. It was all connected to the car battery so it was all powered up for those tests.

Vinny said
Just for the heck of it, after the cluster is back in, use a clip jumper from the brass body of the temp sending unit to the battery NEG, or to an absolutely known good body ground. Let's see what happens. I was in Elevator technician for 43 years. Hopefully your gauge will go high and low, not up and down. LOL Keep us posted.

I will say this - the used sender was hard to get a ground connection on. I ended up with an alligator clip positioned so it bit in between the threads. Just sticking it on there wouldn't ground it, and I never got a ground through the hex part of it. Yes I used 60 grit to clean it up but still no ground through that.