Speedometer stopped workin....

[Only In A Jeep 81]

...as of this morning. Any tips on how to fix this, LOL. I don't wanna have to guess how fast I'm going. I already have speed issues, heehee. Is this something I can fix, or is this something for a shop to do? Thanks y'all.

 

[rockymountain]

check the plug that goes into the top of the rear differential. That is the speed sensor. See if anything looks bad.

 

[LibertyTC]

X2 as above &
DRBIII scan tool needed to test PCM. (dealer time)Does the odometer display mileage, if so,turn ignition to on without starting, and see if a message appear like (NOBUS)

 

[Billwill]

As stated check the sensor on the rear diff and watch out for frayed wires in the vicinity...a fair amount of owners have complained about the cable fraying to ground near the diff or on the handbrake cable. When I fixed a loose connector on the speed sensor on my 2202 CRD, a red light remained lit on the console display until I had done a few on/off driving cycles for about a week at which time the light went out.