Method for powering a heating device for catalytic converter

An adaptation module for a motor vehicle with a combustion engine, said vehicle comprising a power supply module able to supply electric energy and a catalytic converter, said catalytic converter being able to depollute the exhaust gases emitted by the combustion engine and comprising an electric heating device, the heating device being electrically connected to the power supply module and comprising a first resistor connected between a high point and a midpoint and a second resistor connected between the midpoint and a low point, the adaptation module being electrically connected firstly to the power supply module and secondly to the high point, the low point, and the midpoint of the heating device, and configured to adapt the power supplied by the power supply module into an output power and to apply the adapted output power to the heating device.