Hey guys, I'm embarrassed to have to ask this, but a friend of mine wants help installing a subwoofer in her jeep.
I know how to do most of it, but how would you go about wiring it to a stock radio that has no subwoofer out?
I wired my carputer and my subwoofer, but my HU has sub-out, so I can do all of the rest of the wiring just fine once I figure out where to pick up a signal from.
Thanks guys!
PS. I tried to

and

for a few minutes before I posted. If anyone can slip me some better google keywords I'll happily try some more.