Since buying my coupe I have always had a minor electrical problem. First I noticed that when I push the button for my electric windows all my dials dim, and so do my headlights. Also when I start the car and the car is idling the headlights are dimmer than normal, as soon as I give it some rev's they brighten up.
Since then I have added subs and amps into the boot and made the problem much worse. I have replaced the battery for a 72amp which did not resolve the problem. I have installed a power cap in the boot, but that made no difference.
My thought is it might be the alternator! What are your guys thoughts? Should I go get a new alternator and possibly upgrade to a 120amp?