I just discovered recently that my drivers side door speaker was not working, and the passenger side one was very quiet. I just installed my old cd deck and same problem. Back speakers are much louder but front passenger is still very quiet. I took out the drivers side speaker and hooked up another speaker I had and still no sound. I was going to run wires through the door but after about half an hour of pushing wires and poking fingers I figured out there is actually a connector in the door frame and there is no pass through.
Now I can't get the rubber boot back on, and I can't even use that hole for running my own wires. If you just run them inside the door that's going to affect the door seals, not to mention it won't look professional. Short of drilling new holes in the doors, what are my options? Mount them under the dash? On top of the dash? Ha ha.