Control device for on-vehicle apparatus

Provided is a control device for an on-vehicle apparatus, in which fluctuation of a ground potential is suppressed, and damage due to deviation of earth current can be suppressed when a ground part ofa vehicle has an abnormality. The control device for the on-vehicle apparatus is provided with actuators, and is configured to feed power from first and second power sources to first and second microprocessors and first and second drive circuits through first and second power feed paths, respectively, so as to drive the actuators by means of the first and second drive circuits. In the control device, the respective negative electrodes of the first and second power sources are electrically connected to a common ground part. Further, the first and second sensors for detecting current or voltagebetween the vehicle body ground and the respective negative electrodes of the first and second power sources, are provided, and, when an abnormality is detected in the current or voltage, the first and second drive circuits a