[tubbedII]

DIM is so when the headlights turn on, the radio dims so it's not so bright since it's dark out. Some also tap into the dimmer switch so the dimmer also dims the radio brightness.

ANTENNA is for a power antenna, it tells it when to go up and down

I have no idea what P-LT is, the most I came up with on the web was something about the parking lights being off, but I don't know what that does on the radio...