Our family car as described has been modified with an audio jack by the previous owner it seems coming out of the area below the arm rest. It looks like it is replacing another wire next to it that has a severed end. When I plug my phone with music playing into the jack I can't hear it anymore as if it is playing through the car speakers but it doesn't. How do I use this headphone jack to listen to music from the car's speakers?
My car has an automatic transmission.
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