Electrical architecture for a motor vehicle switch having a first control, a second control and a third control, said first control being connected by a first direct wire link to a first output of a microprocessor, said second control being connected by a second direct wire link to a second output of said microprocessor, said architecture being characterized in that said third control is connected by a first indirect wire link to said first output and to said second output of said microprocessor, said first indirect wire link comprising a first part and a second part interconnected at a first electrical node, said first part connecting said third control to said first electrical node, said second part having a first branch with a first diode and a second branch with a second diode; said first branch connecting said first electrical node to said first output of said microprocessor and said second branch connecting said first electrical node to said second output of said microprocessor; said first diode and said second diode being arranged in such a way that an electric current can be transmitted, respectively, from said first output toward said third control and from said second output toward said third control, in that it includes: - a fourth control connected by a second indirect wire link, on the one hand, to said second output of said microprocessor via a third diode, and, on the other hand, to a third output of said microprocessor via a fourth diode, said third diode and said fourth diode being connected at a second electrical node, said second indirect wire link including a fourth on-off switch connecting said fourth control to said second electrical node; - a fifth control connected by a third direct wire link, provided with a fifth on-off switch, to said third output of said microprocessor; - a sixth control connected by a third indirect wire link, on the one hand, to said third output of said microprocessor via a fifth diode, and, on the other hand, to a fourth output of said microprocessor via a sixth diode, said fifth diode and said sixth diode being connected at a third electrical node, said third indirect wire link including a sixth on-off switch connecting said sixth control to said third electrical node; - a seventh control connected by a fourth direct wire link, provided with a seventh on-off switch, to said fourth output of said microprocessor, - in that said microprocessor is adapted to send via said first output, said second output, said third output and said fourth output pulses of electric current whose voltage is determined, along said first direct wire link, said second direct wire link, said third direct wire link, said fourth direct wire link, said first indirect wire link, said second indirect wire link and said third indirect wire link, and in that a periodic measurement is made of said voltage of each pulse of electric current sent along said first direct wire link, said second direct wire link, said third direct wire link, said fourth direct wire link, said first indirect wire link, said second indirect wire link and/or said third indirect wire link. - a fourth control connected by a second indirect wire link, on the one hand, to said second output of said microprocessor via a third diode, and, on the other hand, to a third output of said microprocessor via a fourth diode, said third diode and said fourth diode being connected at a second electrical node, said second indirect wire link including a fourth on-off switch connecting said fourth control to said second electrical node; - a fifth control connected by a third direct wire link, provided with a fifth on-off switch, to said third output of said microprocessor; - a sixth control connected by a third indirect wire link, on the one hand, to said third output of said microprocessor via a fifth diode, and, on the other hand, to a fourth output of said microprocessor via a sixth diode, said fifth diode and said sixth diode being connected at a third electrical node, said third indirect wire link including a sixth on-off switch connecting said sixth control to said third electrical node; - a seventh control connected by a fourth direct wire link, provided with a seventh on-off switch, to said fourth output of said microprocessor, - in that said microprocessor is adapted to send via said first output, said second output, said third output and said fourth output pulses of electric current whose voltage is determined, along said first direct wire link, said second direct wire link, said third direct wire link, said fourth direct wire link, said first indirect wire link, said second indirect wire link and said third indirect wire link, and in that a periodic measurement is made of said voltage of each pulse of electric current sent along said first direct wire link, said second direct wire link, said third direct wire link, said fourth direct wire link, said first indirect wire link, said second indirect wire link and/or said third indirect wire link.