Trying to diagnose a whine in my alternator in my 620 with a 1600 engine. I already replaced the old External regulator with a new solid state one. It is charging right around 14.5volts. Brand new Deka Battery.
I pulled out the new/rebuilt bosch alternator thinking maybe it had a bad diode, and just put it a brand new one (not rebuilt). I am still getting the same high pitched whine. It increases with the rpms and vice versa.
Is it possibly just bad wiring?
I am completely stumped, any help would be appreciated!