1st: I'd pull it out of the wall and check the wiring connections in the back.
2nd: If #1 doesn't work, you may have to check the spliced connections at each speaker. I had problems with mine and had to rework the connections on 2 or 3 of my speakers. The factory's splicing job sucked.
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1988 Coleman Sequoia - popup (1987-2009) - outlasted 3 Dodge Grand Caravans!
2012 Roo19 - hybrid (2012-2015)
2016 Mini Lite 2503S - tt (2015 - ???)
2011 Traverse LT, 3.6L, FWD
2009 Silverado 1500 Ext Cab, 5.3L, 4x4, 3.73
2016 Silverado 2500HD Dbl Cab, 6.0L 4x4, 4.10
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