Good call KevinR.
Back in the good’ol days of the 20th century it was easy to test for this with your VOM on an AC setting looking for no more than an ~100-150 milli-volt reading on a running, charging, DC charging system.
This could be oscilloscope too.
But that was back with analog electronic control systems.
Once to digital, a “gross” AC milli-volt measurement no longer valid. Digital logic controllers need very little ripple power to become confused. Then amplitude ruled. Now with digetal frequncy crossover points are seen as on-off, make-break, 0’s and 1’s.
J-I-C Steve unruh
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