I recently, replaced the factory radio with a Kenwood Excelon, something (###'s). I know that the new head unit has dimmer capabilities when the lights come on, however, I don't know which wire from the factory harness is for this. There are two wire harnesses for the factory radio but only one of them is needed for the power, speaker wires, etc. What would the other harness be for as there is not a factory amp in the vehicle?
Where can I find a good wiring diagram for the factory radio?
J