PURPOSE: To set a posture shifting speed of an on-vehicle equipment to a nearly constant appropriate value in a full temperature region in a device wherein an electric motor for driving the on-vehicle equipment is controlled on the basis of a shift instruction signal by connecting a temperature variable resistor to a portion between the motor and a power source.

CONSTITUTION: In the case where this method is applied to adjustment of tilt-up and tilt-down of a steering wheel, a manual switch 1 is set, for example, on the side of a terminal 1a. When a tilt-up signal S1 is supplied to a microcomputer 3 via an A/D conversion circuit 2, the microcomputer 3 supplies a tilt-up instruction signal S1' to a relay driving circuit 4a so as to turn on a relay RL3 for about 0.06 seconds, to turn it off from about 0.06 seconds to 0.26 seconds and then to turn it on. An electric motor M2 rotates in accordance with on/off of the relay RL3 to conduct a tilt-up operation. In this case, terminals 5a, 5b of the relay RL3 and RL4 are connected to a source voltage VB via a temperature variable resistor R. Accordingly, a supply current to the motor M2 is decreased in accordance with a rise in temperature T.