Light-emitting diode control circuit, having: - a current monitoring circuit for a light-emitting diode arrangement for a signal generator of an illuminating signal system, comprising: - a reference voltage source having an input and at least a first output and a second output, - a comparator circuit having a first input, a second input and a signal output, - a measuring resistor which is connected in series to the light-emitting diode arrangement, wherein - the first output of the reference voltage source has a reference potential (U ref) defined by the reference voltage source and is electrically connected to the first input of the comparator circuit and - the measuring resistor is connected between the second output of the reference voltage source and the second input of the comparator circuit, - a light-emitting diode interface, - a fuse circuit which is electrically connected to the signal output of the current monitoring circuit, wherein the fuse circuit can be set to an off state by a switch-off signal at the signal output of the current monitoring circuit, - a voltage monitoring circuit for monitoring the electrical voltage (U D) drop at the light-emitting diode arrangement, characterised by a second comparator circuit having a first non-inverting input, a second inverting input and an output, wherein the first input of the second comparator circuit is electrically connected to a third output of the reference voltage source and the second input of the second comparator circuit is electrically connected to an output of the voltage monitoring circuit and the signal output of the current monitoring circuit. - a current monitoring circuit for a light-emitting diode arrangement for a signal generator of an illuminating signal system, comprising: - a reference voltage source having an input and at least a first output and a second output, - a comparator circuit having a first input, a second input and a signal output, - a measuring resistor which is connected in series to the light-emitting diode arrangement, wherein - the first output of the reference voltage source has a reference potential (U ref) defined by the reference voltage source and is electrically connected to the first input of the comparator circuit and - the measuring resistor is connected between the second output of the reference voltage source and the second input of the comparator circuit, - a reference voltage source having an input and at least a first output and a second output, - a comparator circuit having a first input, a second input and a signal output, - a measuring resistor which is connected in series to the light-emitting diode arrangement, wherein - the first output of the reference voltage source has a reference potential (U ref) defined by the reference voltage source and is electrically connected to the first input of the comparator circuit and - the measuring resistor is connected between the second output of the reference voltage source and the second input of the comparator circuit, - a light-emitting diode interface, - a fuse circuit which is electrically connected to the signal output of the current monitoring circuit, wherein the fuse circuit can be set to an off state by a switch-off signal at the signal output of the current monitoring circuit, - a voltage monitoring circuit for monitoring the electrical voltage (U D) drop at the light-emitting diode arrangement,