No Sound from rear passenger door

[Jayturk]

I just noticed today, while playing around with the fade and balance, I have no sound coming from my rear passenger door. I removed the door panel and speaker, speaker works, but I get no sound from it. The speakers are aftermarket, the system is the Alpine 9 speaker. Anyone have a clue? Thanks.

 

[rjacobgray]

I am having the same issue but with not passenger side doors. I have kicker speakers