My odometer quit working. I have a 2000 Freightliner with a Cummins. Any ideas on where to check if it is an easy fix, or will it need to go to the shop?
You have round individual gauges right, not a cluster.
If you have the round ones, you will need a new speedometer. The odometer inside gets its information from the speed signal, so if the speedo is working the problem is internal.