[twobjshelbys]

Originally Posted by Gaz64

With the hot lead (12v positive) disconnected from the rheostat input, we can then read the rheostat resistance with an ohmmeter while moving the rheostat dial.

I would check for 12v positive at the input lead with a voltmeter, DVM or DMM, digital voltmeter/digital multimeter.

Gary

What he said.

Except I still have my Radio Shack VOM with a dial meter. Still in the original box. It's got to be close to 50 years old now. Works fine, has lasted a long time. I had a Heathkit VTVM but it was too large and clumsy for most things. I used it when building the Heathkit TV but I think I gave it to Goodwill decades ago.