Have JD 2755 Cab tractor whose tach won't work. Have'nt yet had chance to tear into it to see if I can figure out what's wrong. Any similar problems or ideas. Tks.
That's not a lot for us to go on. Hopefully one of the connectors isn't making good contact (pull them apart, stuff them with dielectric grease (they have it at AutoZone, PetBoys, AdvanceAuto, etc.) and put them back together.
Tear into it and if you don't find your problem, post again.