Toronado electrical problems. pulsating/charge

So my lights started pulsating all over my 1984 toronado. I got the battery and alternator tested multiple times, and they check out fine. Battery was a bit inconsistent with a volt meter, but we took off and cleaned the corrosion off the terminals. Then yesterday my charge light came on and shut my radio off (fuse is not blown for radio). To I took the battery and alternator off to get them checked yet again, and both are still fine according to the testers. I replaced the battery cables, and no change at all. I'm at a loss on what to do!

Before this happened I replaced my headlights, but I didn't drive it a night until a few days later, so I'm not so if they're related? Also about a week before this I installed a new radio and had some trouble with the wipers always on and charge light becasuse I crossed wires, etc. Although these problems ended up being okay after changing some fuses and unplugging/plugging the wiper motor. Not sure if this is just an issue I got from when I was wiring the radio, or just part of it being an old car with problems.

First Guess: You're getting your parts tested "for free" by carrying them into some chain store. Pay someone who knows what he's doing to test them ON THE CAR.

Is the battery fully charged (Open-circuit Voltage at 12.6--12.7?)

What is the running voltage with headlight high-beams on? Off?

Agree with Shurkey....fact your charge light came on means the alternator was not acting up when tested....

Ended up being the motor that puts air into the airshocks was going out, and the light was due to the gauge fuse being overloaded and blown. The charging system was on that breaker. Nothing was wrong with the charging system.