DIY Subwoofer Grill

[Coop7379]

Does anyone know if the wireing is run for the speakers that are not installed on our expy's. When you look up the wiring harness I can only fined one option and it's with all speakers. I know the facotry amp will need upgraded to handle installation of the rest of the speakers including the factory sub. But is the wiring already there?

 

[gkeen19]

I’m interested in doing this in my XLT max. Are the d pillar and subwoofer wires already there?