I do believe the resistor in the R/C part of the board has gone bad.
Jack
Do you fix these? I replaced a tach that had the failed resister and was reading three times as high like this a while back. Still have it may would like to get it repaired for back up.
Originally posted by jpeeler: Do you fix these? I replaced a tach that had the failed resister and was reading three times as high like this a while back. Still have it may would like to get it repaired for back up.
Sent you a PM.
Can you post some info how you removed your tach ? It's been a long time since I cracked open a cluster. Thanks
Good wright up by Buddycraigg. Yes I do fix, calibrate and convert them if you have a V8 or LS configuration. Also do the needles restoration, but best to do all the gauges at the same time.