If the Ram speedometers are anything like the Neons of that era, they had a problem with cold solder joints in the speedometers. I've had 2 instrument panels in my '98 Neon and both had this problem. Both the speedometer and odometer worked intermittently, then not at all. For the Neon, after pulling the instrument panel, you can touch up the solder joints on the circuit board where the speedometer is connected, and it starts working again. If I looked at these solder joints (before touching up), it looked like there was a small circular crack in the solder around the post in the joint. I needed my reading glasses to see the cracks. This may or may not be a problem with the Rams, but since they come from the same era, it might be worth looking at.