Cummins Tachs Not Working
We have a 1996 Shannon with twin Cummins and since buying one tach has been erratic sometimes, generally at low RPM.
Just (unfortunately) had to have two new turbos installed and now both tachs are erratic at times and yesterday when running in the slip they were both normal then they both went to 0 RPM. Restart and both working although the one was jumping which seemed to be in time with one of the alternator dials which was jumping slightly.
Any thoughts would be appreciated,