CIRCUIT ARRANGEMENT FOR SUPPLYING POWER TO CONTROL DEVICES IN MOTOR VEHICLES

摘要

Disclosed is a circuit arrangement for supplying power to control devices in motor vehicles, especially trailer brake control devices. Said circuit arrangement comprises two power supply cables (4, 7), two grounding cables (5, 8), and a switch (S1) that allows the two grounding cables (5, 8) to be connected. The switch (S1) is closed by means of a logic circuit (9) when the first grounding cable (5) is faulty or interrupted. The two grounding cables (5 and 8) are entirely separated from one another during smooth operation such that no reactions can occur from the second grounding cable (8) to the control device (1).