Hi YaBa DaBa Doo welcome to the forum.
I tried to look your system up on the coachmen website, but I can see why you came here instead. Their manual absolutely stinks. Did the dealer give you a packet full of manuals, I wonder if the sound system manual is in there.
As far as your outside speakers I'm assuming you are equating the blue flashing light to a Pairing mode. Have you checked to see if your phone can link via bluetooth?
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2001 Suburban 4x4. 6.0L, 4.10 3/4 ton **** 2005 Jayco Jay Flight 27BH **** 1986 Coleman Columbia Popup