It sounds like the alternator belt is slipping with the high electrical load. Tighten or replace the alternator belt.
A vehicle's starter will being making a loud screeching noise if it does not align properly with the flywheel. It slams against the flywheel and grinds against the surface.
It could be a couple of things but by tour description of a screeching sound, it sounds like it could be the fan out of alighnment, which is pretty common
a screeching noise
A screeching noise when accelerating in your car could be due to a worn-out or loose drive belt, a problem with the pulleys, or issues with the engine or transmission. It is recommended to have a mechanic inspect your car to diagnose and fix the issue.
you have a bad alternater or belt
why does my starter make a loud screeching noise when i start it?
either your belt(s) or brakes most likely
it might be that the wheel is loose or chech your car brakes they might be screeching on the brack disk
Eagles make a screeching noise
Fruit bats.
good chance the fan belt is slipping when driving may need tightning up this wouold cause a screeching noise.
they make a screeching sound