SECURITY SYSTEM FOR A VEHICLE, VEHICLE COMPRISING SUCH A SECURITY SYSTEM AND ASSOCIATED SUPERVISION METHOD

The invention concerns a security system circuit (100) for a vehicle (10), the security system comprising an electronic main control unit (120), at least one electronically operated switch (124, 125), which is arranged on an input line (114) of an electric load (110) of the vehicle, each electronically operated switch being controlled by the main control unit and being configured to switch between a connected configuration, where said electronically operated switch allows electricity to flow through the input line between a main electric power source (104) of the vehicle and the electric load, and a cutoff configuration, where said electronically operated switch prevents electricity from circulating through the input line between the main power source and said electric load. The system further comprises a safety switch (102), configured to be activated by a user of the vehicle, the safety switch being configured to control the main control unit, so that each electronically operated switch switches to its cutoff configuration when the safety switch is activated. Alarm means (140) are activated if after a predetermined first time interval from the moment the safety switch is activated, at least one current sensor (134) detects electric current flowing through the corresponding input line.