65 Valiant now gauges go full when ignition key turned or running

I have my voltmeter today but didn't know what to test. I tested voltage at the temp switch and it's less than a volt. I've got the rte solid state regulator in and the voltage at the ign terminal is 11.65. My battery is at 12.40. I tried an original used regulator I had and probed the temp switch while engine running and it didn't even light up. With the original regulator non solid state it shows about the same voltage on the ign terminal. What should I try now?