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Car Audio Question- Upgraded Alternator AND Optima battery..Headlights Still Dimming!!!!?

I have a 2000 Dodge Intrepid, 3.2l, I have installed a 600 watt amp, 2 JVC 10'' subs, a optima yellow top battery, and the highest output alternator that I can get into my car. But my headlights still dim!!!!!! Whats the problem???


Sound like a cable problem. I would suggest changing both the negative and positive cables on you vehicle.. also check that you're body grounds are intact and in good shape. It is over 7 years old and they are probably starting to deteriorate and you

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