>Whatever you do do not buy a cap, caps are shit and just
>drain your electrical system more.. you need to go straight
>to the source and upgrade your alernator and battery.

I'm guessing if you had one you hooked it up wrong or something. A cap will in no way be a burden to your electrical system. As far as the topic of the post, it's not gonna matter when you get the ground reworked, you'll probably still have the dimming lights on the CD player. It's just a fact of life with the small power supply for the thing trying to do so many things. Your best bet is to get a small amp for your interiot speakers. You don't need much to push mids and highs inside, can get away with 25-30 watts per channel on those amps with no problems.