blue is usually a remote wire that turns it on. on car amps they also run a blue, red and black wire. the red wire is positive, the black wire is ground and the blue wire attaches to the blue wire on the radio. when the radio is turned on it sends a signal and turns the amp on. there should be some type of remote wire on the stock radio that would signal like the blue wires on aftermarket radios. hope this helps mark Jason Rowe wrote: > Hello all. > I have a quick and potentially dumb question for some of you. > What are the 3 wires ( yellow, white, brown ) that go to the power antenna? > Reason I ask is that I'm putting an aftermarket antenna in and I can't seem > to get it to go up or down. [moderator snip]