What does this toggle switch do?

I think it does something with the cd player or speakers. There is speaker wires hooked to it. Gonna look into it more later.

Just because there are speaker wires hooked to it doesn't necessarily mean its for the radio or speakers!

When whatever knuckle head installed the radio into my car they also spliced speaker wire into the harness! I still have to trace it all down, but it involves the dimmer switch, dome lighting and possibly the door switches. :angry5:

Doesn't anyone know that there's an accessory plug in the harness behind the dash? All you need is a bullet connector. Instead I got 12 feet of speaker wire and a lead soldered onto one of my fuses for power. :wack:

At any rate, I'd trace the wires down before I messed with it too much.