There is a non switched, constant power line that goes to the domelight. However, I would imagine the dome light fuse would be at most 10 amps, which means about 120 watts of power. That may, or may not be enough to eun the overhead player. Just look at the back of the player and find out! You do not want to go beyond 75% capacity IMO. That is about 90 watts. If it is not enough, you run a fused powerline from an available source in the fuse box, or direct from the battery. To make this a real mod, then you can use domelight's unswitched line to power a relay, which then will control that direct powerline, so that you can take advantage of car's smart battery saver, which cuts power to most components, including your player, after about twenty minutes when ignition switch is in the off position. :4: