gcliburn

I have asked before, but never figured it out. My 92 has speedo issues. It either jumps around alot, reads too high with a little movement, or jumps even while sitting still. What I need is advice about what to check and how to check it and either specks or where to find specks. I have changed speed sensors on the T-Case in past years which worked, but that no longer seems to work unless I am getting bad sensors. Thanks for the help, all ideas and info are appreciated.

rustbucket

Check the wires, from the sender, up to the cab, mine was doing the same thing, and I found a bare spot got it taped up, and speedometer works fine now.

wannadiesel

What he said, and check the cluster ground. There's a thread in the sticky from Jim Lane about converting the gauge lights to LED's that covers fixing the cluster ground.