The odometer light on my truck works sometimes and sometimes doesnt. If I slap the dash above the light it will bring it back most of the time. Any one know what the problem may be?

 

I take it you have the digital green that is 1) temperature sensitive and 2) vibration sensitive. My 2000 has this and it only gets worse. Having the a/c on does help, but there is a detailed how to in here if you do a search say odometer. It is a good solution rather than buying a whole new cluster. All you have to do is put a dab of solder on one part of the circuit board. I haven't done it (lazy) but will soon enough.

 

your my boy blue

 

you need this thread.

 

My old truck the problem had to take out the cluster and reflow the joints with a soldering iron and add some new solder to it and that took care of the problem.