'93 B250 w/v6. It seems like the whole instrument board is going haywire. First was the odometer, then the gas gauge (bobs around like a drunken sailor, until it finally passes out @ half-tank), and now the speedo goes nuts, pegging out in reverse, showing 60 mph when I know I'm only going 25 or so for the first couple of miles, etc. I have seen some gas gauge/sulfur posts, but how do I fix the speedo and odo?

 

Something is shorting out back there.

 

Not sure on your year I have a 1990 B-250 conversion and the speed problem was easy to fix. I had to put a new speed sensor on the tail end of the tranny. Only tool I used was a pair of channel lock pliers LOL. Easiest fix I have had in a long time. Now the odo and trip aren't working I figure that is a mechanical problem have yet to really investigate it. If you do have a sensor make sure to watch the position of the old one when you replace it, on mine I had to move the housing several times before it would work properly. Good luck

 

Hello again. Just got around to the speed sensor, and forgot about the position of the thing. Can you give me some idea of where to start on the position it needs to be in?