I am having a power problem when my radio, air, or headlights are on. The power will shudder, wanting to stall. I had my alternator replaced recently, however, i am still having this problem.

Fuses seem fine. Could this be a wiring issue? Driving at night is fine with headlights, but dimming occurs when breaking. And i definitely will not turn the air or radio on, because it gets worse.

help,
mike