Skip white distributor wiring
Start it and pop the battery cable off if it stays running your charging fine.. .
DO NOT ever do this!!!! I wish I could bury this wives tale forever.
1---The more modern your car, the better the chances that you will fail something electronic from the huge electrical spike this generates
2--It does NOT prove the charging system works, or if it is working properly.
Situations:
A---If the system is damaged, IE the alternator has a bad diode or other damage, and may have "been" a 60A alternator, now effectively a 20? A unit, the engine will still run when you remove the cable, because all it's doing is running the ignition. This does NOT prove that it's charging correctly or that the regulator is at the right voltage, or that it's even putting out enough to run the car when other loads, heater, etc are on
B--Some alternators don't output well at low engine speeds. If the vehicle is idling slow enough, and you pull the cable, it might die because the alternator is not turning fast enough, and you might incorrectly conclude that it's not charging. In fact, it might be working quite normally.