My gauge was doing the same thing. Turned out the terminals on the back of the gauge were corroded/rusty and not making good connection. I cleaned with sandpaper and oiled the terminals and now it works perfect.


57 GMC LCF 370
55 John Deere 40-W
59 John Deere 430-W
2000 GMC 4x4
56 John Deere 420-W
Pix on Photobucket