I recently bought a 2004 Honda Civic used. It seems that the previous owner installed hook ups for a XM satellite unit in the car. I have three cables running across my dash by the windshield. They are a 2.5mm audio cable, power cable, and also a antenna cable. I also found a magnetic antenna on the exterior of the car which has a wire running down the windshield into the interior of the car. Here is my question.
Could I splice in a 3.5 mm plug on the 2.5mm audio cable or use an adapter on the 2.5mm audio cable for a possible aux input? Would the radio recognize the signal coming from the cable without any of the other cables in use?
I want to be able to use my smartphone in the car and it seems like somebody already did some work to make this happen with an XM and I would to piggy back off that if possible. If I can I would like to avoid buying a radio and taking the dash off, but if I have to I will just trying to take advantage of something already installed in the car.
Any help is much appreciated.