List of all the grounds in a 2000 explorer

[98 EB xploder]

I have an aftermarket alt and it's not working right. It's test fine but when I put it in I have the same issue. When my factory alt was in its fine, so I wanna go over all the grounds and replace them and see if that fixes it. I have 4 xs power batteries all grounded to the frame.
Here is a vid of what it's doing. There's also a recurring whine coming from the alt at the same pace as the gauge flutter
http://i104.photobucket.com/albums/m189/poundinredline/831cf24d.mp4
Thanks for any help

 

[budwich]

Run with just one battery and monitor your system. Add one battery at a time and monitor... see if you notice any differences and go from there.

 

[98 EB xploder]

I'll give it a shot

 

[98 EB xploder]

Still does it just not as bad, probably because there less of a load on the alt

 

[budwich]

"still does it"???? does what... whine?, voltage change? Anyways, personally, if the alternator is whining, its the alternator and not a ground... grounds don't whine... my guess is a bearing has a minor issue and possibly the commutator has pitting possibly.