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Hey everyone, we just installed a boss 14 inch soundbar into my friend's 2018 700-4 deluxe. When the machine is on accessorie the speaker sounds great. When you start it you hear a hissing. Also nosie changes when light bar is on. It's t tapped into 12 volt cigarette wires. Also for some reason the dealer installed the winch into thses same wires. You also get a bigger noise when you engage the winch. I pulled the fuse on both lines and still the noise. Also went straight to the battery and get it when running. I have the rca wires running down under passenger side next to the gas tank. I've questioned my self if it's possibly the fuel pump making the interferance.... any ideas?
 
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