Ok, so I've installed an aftermarket HU, amp, and subs. I have RCA's hooked up ONLY for my subs and I am using the OEM wired for all speakers inside the car. Everything is hooked up BUT the only time the interior speakers work is when the radio is in use (AM/FM). The subs in the trunk always work. So everything sounds great as long as I'm listening to the radio but if I switch to pandora or either of the USB inputs or the Bluetooth, the only sound that is produced is what comes through the subs. I'm aware of the factory amp and I'm wondering if I have to bypass it. I keep hearing about the blue remote wire. YES it's hooked up correctly. If I need to bypass the factory amp how do I do this? I figured I could just snip off the connector and connect the wires together that are in the harness at the factory amp. Someone please for the love of beamers HELP!!!