While we're on the subject, I'd like to troubleshoot my gauges but am electrically challenged. I am figuring that the correct way to test would be to power on the instrument circuit on my 12V panel and then connect a multimeter to the pos side of a gauge and then other lead to ground--voltage indicates power to circuit. Then remove the negative wire from gauge and test from neg side of gauge to a grounding point to see if the gauge is functional--should show some amount of voltage, right? If this is correct and the gauge tests as functional, then I need to look for wiring shorts and if the relevant transmitter is still functioning.
Is this the general idea? Am I getting warmer, colder, or just getting older?
Thanks,
JQ