I replaced my speedometer with a known working replacement (I'm not sure if you exchange the speedometer from one car to another it will work since you could make a high mileage car a low mileage one that way) and still no speed or distance (odometer) indication. Has any one had experience replacing their sending unit for the speedometer? If there were a way to test the unit to tell if it is the problem, this would help to keep me from heading down the wrong path. Thanks