Circuit arrangement for actuating electric motor utilized for driving fan to cool internal combustion engine of motor vehicle, has lines running between controller and contact, and voltage measuring device arranged in circuit for resistor

摘要

The circuit arrangement (100) has three lines (130, 140, 150) running between a controller (110) and a motor contact (121). An electrical resistor (132) is arranged in the first line. The controller comprises a ground terminal (114), which is connected to another motor contact (122). A voltage measuring device (160) is arranged in a parallel circuit for the electrical resistor. Another electrical resistor (142) is arranged in the second line. Voltage is applied to the first line, the second line or the third line with respect to the ground terminal by the controller.