Originally Posted by jherrin215
yeah that is the plug that plugs into the auto dimming rearview mirror with the compass and temp built in.
sometimes on the upgraded OEM radios there is a secondary plug for the steering wheel controls or Factory Sat radio. it looks similar to that plug but I can't really tell from that pic.
Any way its cheaper for auto makers to put in all those wires in all their cars rather than make custom wire harnesses for each, you'll find other random harnesses behind that dash too for other little add ons