I have an aftermarket head unit in my car. The previous owner installed it, but didn't have the factory subwoofers hooked up. I'm trying to use the factory shaker 500 door subs and factory shaker 500 amps with this aftermarket head unit.
I did a bit of searching, and have some to one conclusion. I can only utilize the factory amps/subs if i get the PAC adapter ( PAC C2R-FRD1 Factory Integration Adapter Connect a new car stereo and retain factory amp and rear seat system in select 2005-up Ford, Lincoln, and Mercury vehicles at Crutchfield.com
Is this correct? or is there another way to achieve this without getting the adapter or butchering the harnesses behind the dash?