1. A circuit assembly for simulating a first load current for a first load to be simulated in an on-board network, comprising:an input configured to be connected to a line of the on-board network of a vehicle for connecting to a second load,
an output for connecting to a light source, wherein the light source has a lower current consumption than the first load to be simulated,
a series circuit comprising a resistor and a switch, wherein the resistor is rated to a comparable order of magnitude to a resistance of the first load to be simulated, and the series circuit is connected in parallel with the input,
a switching controller, wherein an input of the switching controller is connected in parallel with the input of the circuit assembly, and draws a current from the line of the on-board network for connecting to the second load, wherein a second load current is smaller than the first load current,
wherein the circuit assembly is configured, upon the activation of the second load, to open the switch and activate the switching controller and, upon the disconnection of the second load, to close the switch and deactivate the switching controller, wherein an output of the switching controller feeds at least a portion of the drawn load current back into the on-board network,
wherein upon the activation of the second load, the light source is only switched on after a specific time interval following the closing of the switch.