When repairing electrical equipment and the engine power system, disconnect the wire from the terminal «–» battery.
When replacing fuses, it is forbidden to use screwdrivers and metal tools, as this can lead to a short circuit in the circuits of electrical equipment.
It is forbidden to disconnect the ignition switch and the battery while the engine is running, as this will lead to failure of the voltage regulator and elements of the vehicle's electronic equipment.
When checking the circuits of electrical equipment, it is forbidden to short to «mass» wires (check the continuity of the circuits «for a spark»), as this can cause failure of electrical components.
You can only check the alternator on a car with a voltmeter and an ammeter. In order to avoid failure of the diodes of the rectifier unit, it is forbidden to check them with a megohmmeter or a test lamp supplied with a voltage of more than 12 V, and also to check the electrical equipment circuits on the car with such devices without disconnecting the wires from the generator.
It is necessary to check the insulation resistance of the generator stator winding with increased voltage on the generator removed from the vehicle, with the stator winding terminals disconnected from the rectifier unit.
When carrying out electric welding work on a car, it is necessary to disconnect the wires from the battery terminals and the generator leads.
Do not touch the elements of the ignition system and high-voltage wires while the engine is running. Do not run low voltage and high voltage wires in the same bundle.
When recharging the battery in a car using a charger, disconnect the wires from the battery terminals.