How to Check an Automotive Electronic Voltage Regulator?

[OCassandra]

Automotive electronic voltage regulator inspection method is: 1. Connect the tester's positive terminal to the regulator's positive post, ground to the regulator's ground post, and use a wire to connect the field terminal to the carbon brush; 2. Use a test lamp to check if the carbon brush has power - if the bulb lights up, the electronic regulator is functioning normally; if not, it indicates damage. The working principle of an automotive electronic voltage regulator is: When the engine's output voltage becomes low or fails due to other reasons, the battery will generate current in the generator's windings. The electronic regulator then cuts off this reverse current to prevent excessive current in the motor windings from damaging the generator. The electronic voltage regulator is an alternator with intuitive charging indication and fault display functions.