I do own a voltmeter, and know a bit about car stereo but this is perplexing me. What's happening is all the electrical in my car is surging. I first noticed this one night because I saw my headlights flashing on the car in front of me. The gauge cluster will surge, the interior lamps will surge, and all head/tail lamps, however my aftermarket head unit does not. It's a fast blinking the lights never go completely out. I have visually inspected all fuses, and made sure there were no burnt out lamps. The only thing I can think of is does the alternator have a voltage regulator that may have gone bad, and is there a way to test it? Any other ideas? I think people think I am a cop, haha. Thanks for the help!@