Electric circuit for monitoring isolation resistance measurement within the high voltage, HV, board net of an electronic vehicle, comprising: a HV power system providing a positive high voltage potential (HV+) and a negative high voltage potential (HV-), wherein a common ground potential (GND/Chassis) is defined in the middle between a positive isolation resistance (R IsoP ) and a negative isolation resistance (R IsoN ), the positive isolation resistance (R IsoP ) and the negative isolation resistance (R IsoN ) being connected in series and parallel to the HV power system between the positive high voltage potential (HV+) and the negative high voltage potential (HV-); a positive measurement resistance (R 0_p ) connected in parallel to the positive isolation resistance (R IsoP ) between the positive high voltage potential (HV+) and the ground potential (GND/Chassis); a negative measurement resistance (R 0_n ) connected in parallel to the negative isolation resistance (R IsoN ) between the negative high voltage potential (HV-) and the ground potential (GND/Chassis); a positive voltage meter (U BAT_P ) between the positive high voltage potential (HV+) and the ground potential (GND/Chassis); a negative voltage meter (U BAT_N ) between the negative high voltage potential (HV-) and the ground potential (GND/Chassis); characterized in that the electric circuit further comprises only a single amperemeter (I iso_p or I iso_n ) permanently configured to measure either a positive current I iso_p through the positive measurement resistance (R 0_p ) between the positive high voltage potential (HV+) and the ground potential (GND/Chassis), or a negative current I iso _ n through the negative measurement resistance (R 0_n ) between the negative high voltage potential (HV-) and the ground potential (GND/Chassis). a HV power system providing a positive high voltage potential (HV+) and a negative high voltage potential (HV-), wherein a common ground potential (GND/Chassis) is defined in the middle between a positive isolation resistance (R IsoP ) and a negative isolation resistance (R IsoN ), the positive isolation resistance (R IsoP ) and the negative isolation resistance (R IsoN ) being connected in series and parallel to the HV power system between the positive high voltage potential (HV+) and the negative high voltage potential (HV-); a positive measurement resistance (R 0_p ) connected in parallel to the positive isolation resistance (R IsoP ) between the positive high voltage potential (HV+) and the ground potential (GND/Chassis); a negative measurement resistance (R 0_n ) connected in parallel to the negative isolation resistance (R IsoN ) between the negative high voltage potential (HV-) and the ground potential (GND/Chassis); a positive voltage meter (U BAT_P ) between the positive high voltage potential (HV+) and the ground potential (GND/Chassis); a negative voltage meter (U BAT_N ) between the negative high voltage potential (HV-) and the ground potential (GND/Chassis); characterized in that the electric circuit further comprises only a single amperemeter (I iso_p or I iso_n ) permanently configured to measure either a positive current I iso_p through the positive measurement resistance (R 0_p ) between the positive high voltage potential (HV+) and the ground potential (GND/Chassis), or a negative current I iso _ n through the negative measurement resistance (R 0_n ) between the negative high voltage potential (HV-) and the ground potential (GND/Chassis). <EOS>