Recently fueled up, reset the analog trip odometer as we were driving out of the fuel station. The needle and odometer both have been sitting at zero ever since. I have the 12 vdc to the unit, I have reading to ground at the quick disconnect. There is a plug that has 12 vdc going into it, then I believe out to the sending unit, so I would like to figure out where the sending unit is located, if there is something I can check there, is the speedometer bad?
Even though I have a reading to ground at the quick disconnect, my instrument bulbs at the speedometer and air pressure gauges quit working, so I may still have a grounding issue which I will check further in the next couple of days.
This is a 95 Beaver 300 hp Cummins, Allison 6 speed automatic with an analog VDO speedometer. I see they have a facility in Cedar Rapids, Iowa. Has anybody else used this option or is the normal semi truck repair facility the place to bring this if all else fails?
Mike Engen