Adjusting circuit for light-emitting diode indicator light for vehicle trailer at light control of towing vehicle, has bipolar switching transistor for determining current threshold of light diodes over shunt resistance in positive cable

摘要

The adjusting circuit comprises bipolar switching transistor for determining the current threshold of the light diodes over a shunt resistance in the positive cable. The temperature is compensated by the temperature dependent resistance, where short-circuit is identified in the light diode for the feedback of the short-circuit error.