I have a 2000 F350 Diesel that had a good speedometer when I bought it. Shortly after, it stopped working. With the speedo wne the odometer and the cruise. The OD light is flashing. When I had it plugged in I got the code for vehicle speed sensor, but I had those replaced and nothing still. I took it back in and they said the problem is the signal from the speed sensors is getting lost somewhere between the abs module and the PCM. They checked the abs system and it had no codes or problems. So does that mean my PCM is bad? Also, the speedo comes on from time to time, then goes out again. Also, if it is the PCM, where is that located so I can take it out and have it tested? Thanks.
Monday, June 18th, 2007 AT 3:05 PM