Recently my readling lamps and any lights inside the car dont work and now my headlights and speedo lights cut out and turn off sometimes while idling.

I just put a new battery in so i know that aint the problem. I do have subs and an amp in my trunk but the lights go in and out even when the subs are off.

What could i do to fix this? Get a capacitator or get a new alternator. All sugestions are welcome thanks.

i've heard that the volt booster that 3800performance.com is not recomended for 2000-05 my car had been dimming all lights repeatedly at idle and while under throttle it went away on its own after about 2 weeks (never figured it out). however it was not as severe as you are describing i would remove the alternator and have it tested if you haven't already to see if it putting out what it should other than that check all the cables and connections to make sure that they are clean and firmly fitted