Wassup guys, I'm trying to fix up my accord and next on my list is the power antenna. It used to be working fine, but then the antenna wouldn't go up or down.........but the motor still clicked and ran. I just figured i'd buy a new mast. But then i had my aftermarket stereo stolen. I went ahead and bought an oem radio w/ theft function off of ebay and when i plugged it in and turned it on the antenna motor doesn't even run.

I checked the fuse and its fine. Could it be that the radio i purchased has a theft function and my original radio never had one? Or do i need a whole new antenna motor? What could it be?