Recently in the past few weeks I have noticed my headligts to be really dim. The brights are at about what the headlights should be. It seemed to happen round the time I installed my stereo system but I unplugged it from power and the lights are still dim. Any ideas? The cars an 03 but the battery is original, it's tests fine though. Only other electrical issue I have is power flicker whn I have the stereo system hooked up and the bass going. I thought power caps were supposed to stop the flicker?
Any help appreciated, thanks