Dodge Cummins Diesel Forum banner
1 - 4 of 4 Posts

·
Registered
Joined
·
17,420 Posts

·
Registered
Joined
·
17,420 Posts
If I type in NO TACH NO SPEEDO and filter it for 94-98 almost all of the searches reference replacing ESS. So I have no idea.
Because the same non-logical guesses are rampant. Do any of them show the ESS fixing the speedometer?

The logical way to troubleshoot would be to determine what the speedometer and the tach have in common. That requires opening the factory service manual and searching for a common link. More than likely that common link is a ground.
 
  • Like
Reactions: RollDUPwood

·
Registered
Joined
·
17,420 Posts
More likely is one of the wires to the ESS is grounding out. I found mine rubbed through at the front of the engine. The engine speed sensors do fail rarely, but it's an expensive part to just throw at the problem.
 
  • Like
Reactions: RollDUPwood
1 - 4 of 4 Posts
Top