Guys, I may be WAY off base here and the info is stashed some where in my shop. Probably over a year ago I ask some questions about tearing my guages apart and ask some questions. "Someone' told me how to test it with my 12 volt battery in my Silverado ( I did an it tested OK) and also someone told me I did not have to change anything or put a reducer on my guage. That, if it did in fact work, it would still work and be OOOK when I change the 52 Panel to 12 volts.
Maybe I shouldn't post or open up a can of worms here until I dig out the printouts....... but it'll get your minds to spinning.