Hello

I recently purchased a Shaker 1000 head unit, amp, and subwoofer for $75. This would be an upgrade from my shaker 500 system currently in my 2007 Mustang GT. After installing the head unit, pressing the AUX button cycles through the satellite radio but does not bring up an option for the jack. Any ideas on how I can fix this?

Also, how do I connect the amp in the back? There is not a plug for it to go into. I have read some forums talking about tapping into the existing rear subs...

Shaker 1000 Swap