Does anyone have any techniques for testing the 914 RPM gauge? Mine is dead. I have good 12v and ground at the rear terminals and what appears on a voltmeter (I don't have an oscilloscope) to be a varying voltage on the signal wire. I had the gauge apart for cleaning/painting and might have messed it up. I want to make sure before I take it apart again. What type of signal can I feed into it to test it?
Thanks for any help!