Hi guys, I'm a noob when it comes to head unit installations. So I bought one of those Android head units and connected it up with a harness from Aerpro (the APP0277). Everything works fine but the volume is extremely low - even on max. I noticed there was another cable that plugs into the factory head unit that helps to increase volume (I tested it unplugged on the factory head unit and it also reproduced very low sound at max). The cable has 3 wires in it (red, grey and green) but the plug doesn't fit into my Android head unit. Can anyone point me into the right direction? Should I be splicing into those 3 wires and connecting them to my ISO harness?
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