To the original poster, are you asking if you can add the factory subwoofer in an Escape that did not come with a factory subwoofer to begin with? If that's what you're asking, then I'm interested to see if it can be done or not. Earlier today I pulled the panel off my newly acquired 2009 Ford Escape thinking there was a subwoofer and amp, and I was disappointed to see that there isn't one. I should have known, since the panel does not have the speaker grill.
I want to add some bass to the vehicle but not too much, and I don't want a subwoofer to be visible. Just wondering if I add a factory subwoofer and amp, how that works as far as wiring. I'm thinking, if you're using an aftermarket deck that has an RCA sub output, then run RCA cables from the subwoofer/amp to the deck. As for power to the amp, instead of running a cable from the battery to the amp (which I would do if i was usign a bigger amp for more power), I wonder if the power wire for the amp can just come from the deck itself (ie. just use a thin gauge wire to the power wire for the deck. Same idea for the ground wire) ?