Does anyone know how to take apart a driver side door on 1996 Mustang GT with a Mach 460 stereo system? My driver's side tweeter gets no signal. I verified the tweeter is not blown and the 5" door speaker does play, but less loudly than the passanger side speakers. I guess its a loose wire or a blown left channel on the front amp. I need to take apart the door and find the hidden front amp. Any ideas or website with drawings?