The front passenger speaker in my car most of the time doesn't work. To make it work you need to turn the volume up quite high, and then it will work. If you turn the volume back down it will still work, but eventually cut out again. I'm not sure what this will be a problem with, wiring, is the speaker faulty? I took the speaker off to check the connection and it's fine. I'm not really knowledgeable enough to take my front dash off and follow the wire to check for problems. Anyone got any idea what it could be?