All the instruments in the cluster work (tachometer, oil pressure, coolant temperature, &c) except the speedometer and the odometer. The technician at Joe’s Garage determined that the cable is getting 5v at each end–it’s grounded and getting power. This leads him to conclude that the speedometer cable is not the problem, nor the sensor. Instead, he’s diagnosed the instrument cluster as a whole.
Does this seem plausible? I’d think the sensor would be a more likely culprit, and an easier fix.