Stop in for a cup of coffee

More... You only pointed out issue at 2 of the 3 thermal gauges. If the OEM fuel gauge works, any of the 3 works, the regulator is working, since the one regulator supplies 5 volts to all 3.
Nope fuel gauge hasn't worked right since I got the car. They had an aftermarket under the dash oil/temp gauge. I took it out put the new senders in with a new harness. I used one of Ray's testers when I had the dash out and the gauge needles did turn. I'll send you a PM later today. Thanks!!