Alternator: Testing and Inspection

WAVE PATTERN CHECK USING AN ANALYZER




MEASUREMENT METHOD
Connect the analyzer special patterns pick-up to the generator B terminal.

Standard Waveform:

NOTE: Furthermore, the voltage waveform of the generator B terminal can undulate as shown. This waveform is produced when the regulator operates according to fluctuations in the generator load (current), and is normal for the generator.




ABNORMAL WAVEFORMS EXAMPLES

NOTE: Identification of abnormal waveforms is easier when there is a large output current (regulator is not operating). Waveforms can be observed when the headlights are illuminated.)

NOTE: Check the conditions of the charge light (illuminated/not illuminated) also, and carry out a total check.