I have a motorhome with a 1999 E-450 chassis. The speedometer does not work at all but my odometer IS working. I do not have any blown fuses, no ABS or check engine light on the dash, the transmission is shifting normally, cruise control and overdrive on/off button working like normal. From the research I have done, if the VSS sensor on the rearend was bad, my odometer would not work and my transmission would act weird. Using a AA battery and wires across the pins for the servo motor for the speedometer needle, the needle moved. To me that seems like the servo motor is working. Does anyone have experience with this? Could it be an issue with the circuit board for the instrument cluster?