Do not operate the generator with the battery disconnected. When the generator is running with a disconnected battery of the car's on-board network, voltage increases occur when any electricity consumers are turned off, leading to failure of the car's electronic equipment, including the voltage regulator and the rectifier unit of the generator.
Do not test the generator for «spark» even a short-term connection of the positive terminal of the generator with «weight». In this case, a significant current flows through the rectifier unit, and the diodes are damaged. You can check the voltage of the generator only with a voltmeter.
«Minus» battery terminal must always be connected to «weight» car, and «positive» connect to the generator output. Reverse (wrong) connecting the battery will dramatically increase the current passing through the generator diodes, and they will fail.
Do not test diodes with voltages greater than 12 V or with a megger, as it has too high a voltage for diodes. In this case, when checking, the diodes will be pierced (a short circuit will occur). When checking the insulation of the electrical wiring with a megger, disconnect all wires from the generator.
Disconnect all wires from the alternator and battery when electric welding body parts.
Check circuits and components of electrical equipment and troubleshoot with the engine off and the battery disconnected.
Disconnect the wire before removing the alternator «masses» from the battery.
After installing the generator, connect the wire «masses» to the battery.