Car wiring faults lead to incorrect operation of sensors and devices, on-board computer and automation and can lead to a complete failure of electrical equipment. Therefore, it is required to ensure timely replacement of the wiring. Before replacing the wiring, it is subjected to ringing out that is, determining the damaged areas. To replace the wiring, select the wires with the same characteristics as the damaged ones. Depending on the location of the wires to be replaced, sometimes it is required to disassemble the car parts. Replacing wiring requires knowledge of electrical engineering and experience in electrical work.