Hey. New to the forum and just bought an 11 outdoorsman with the Hemi. Love the truck. Has the alpine 10 speaker system but 1 speaker the one in the headliner in the back (crew cab) has no output (sound). Pulled my scanner out and has an audio error code for no output on the speaker (I tried a replacement speaker already) think the amp is bad ?? Ideas ? Anyone run into an issue like this before I buy a used amp.