On my 1994 cougar with 4.6 I am having a weird charging problem. The volts seem to be surging. I'm on my 3rd alt now. Same issue with each alt. I got a smaller pulley from a member here and it didn't really help. When I turn my headlights on at night I can see them getting brighter and dimmer really fast. Almos strobe light fast. I can also open a door and it happens with the dome light even with the was lights off. I can bring the car up off an idle and it stops. I tried adding extra grounds via the big 3 method (or something on that order) that I read on here. The volt gauge will bounce up an down as this is happening. Any ideas on anything else to check? I have checked and added grounds and replaced the power wire. I don't know what else to check. Any ideas.