Inoperative Speedometer '91 LY 36
Had "Bad Bus" towed into the Transmission shop for repair. Picked it up and now the speedometer has quit. It was working fine prior to the repair, also showed working on test drive check off. It first started out as intermittent, would totally quit then start working again but was sometimes erratic. Turned around went back to the shop. Along the way I got up to about 60 mph it stabilized and continued to work. Shop tech hooked a computer to the vehicle and we went for another test ride. Worked perfectly for course! Next day at start up, no speedo, drove back to shop and left it for them to figure out. All of the other instruments in the cluster work. I had it out some months back, replaced all lamps and traced the circuits to make sure everything worked. This cluster is electronic and does not have a cable drive.
Sorry if the answer is in here somewhere. I tried to do a search but my internet connection is slow lately and it just keeps searching until it finally times out.
Thanks, Road Dawg