Negative ground electrical system has an operating voltage of 12 volts. Power for the system comes from the electrical lead-acid battery, which is recharged by a generator.
It should be noted that when working with any element of the vehicle's electrical wire of the negative battery terminal must be disconnected to prevent short circuits and / or fire.
At regular intervals check the location and fastening of wires, make sure that the wires do not grind on the other elements. If you find that any wires rub against the other elements, take the wire to the side and secure so that it does not happen again.