They did away with the separate speaker switches altogether on mine. The inside/garage/outside are controlled with the balance and fader controls. Took a bit of playing with it to figure it all out. So it depends on what type of system is in yours. Mine has a Sony automotive style head unit. But if you have two non labeled switches I would definitely try them and see what they do.
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2014 Raptor RP300MP w/ Rear Patio Party Deck, Folding Side Ladder, 6 Point Level Up, Carlisle Radial Trail HDs
2004 2500HD D/A CC SB - TTT Mirrors, Prodigy BC, 18K Pullrite Superglide, NEW Fuel Injectors 11/2015 (ouch)
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