Doubtful that all gauges would go bad at once. Make sure the ground wires are properly attached, especially the strap that runs from the headlight switch to the wiper switch to the dash frame. I do service 70-72 gauge clusters, if interested email me. The tach problem is probably a piece of debree in the movement and can be fixed.
Ya I got more grd straps connected then I know what to do with them. I tried your bench testing program and it went south..
LikeI Have said before I ain't no "techno dude".hahaha Thx Steve for your help. I may take you up on the restro of the gauges.
A forum community dedicated to Chevrolet Chevelle owners and enthusiasts. Come join the discussion about restorations, builds, performance, modifications, classifieds, troubleshooting, maintenance, and more!