The power supply control apparatus inductive load

The power supply control apparatus of the present invention, an inductive load to detect the abnormal ground wiring disconnection to avoid an abnormal control state continues for the purpose, comprising: a power supply switching elements (140a, 140b) a microprocessor (130A) switching control, constant voltage power source (120), and the freewheeling diode (152a, 152b) connected in parallel to the inductive load, when the ground terminal (104) open circuit, the power source capacitor between the power terminal (103b) and a ground terminal (104) is connected ( 113) using a freewheeling current is intermittently driven inductive load is charged so that the voltage rises, if the voltage exceeds a predetermined threshold value, the detected disconnection ground wiring abnormality, and cut off with the power switching element (140a, 140b) .