Re: Power window issue
First, externally charge battery. When a selection of window position is used, a lot of power is needed.
With older electrical systems, 50+ years, power comes from battery, older wiring and connections, and the alternator is used for recharging battery.
But, engine needs RPM's for replenishing battery. Today's electrical systems can supply more power and at a lower RPM.
There is no secondary regulator for electrics, if this is what you're asking. The buzzing is the relay since not enough power for it to close.
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