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I installed an amp and door speakers, and now when my lights, a/c and stereo are on, there's a whine coming from somewhere near the battery. It doesn't whine when there's no a/c, no stereo or no lights. It only happens when there's all 3. What could the problem be?

 
Rep Power: 328

Did you run your RCA's and power wire down the same side of the car?

 
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yeah but i kept them as far away from each other as possible, could it be a bad ground?

 
Rep Power: 329

you probably have the whine all the time. more stuff=more current=more induced voltage=more whine.

 
Rep Power: 0

You ran your power wire down the same side as the rca cable? YOu cant do that man! It's ok for them to cross briefly but not run together. Move the rca to the opposite side of the car and I bet it will disappear.