OK, I have read several threads about fixing the backup sensor system. I'm wanting to take a look and the speaker. Could someone explain how to get the section of the interior off to gain access to the speaker? I briefly looked at it and didn't see any screws. Is it held together with clips?

 

Pull down the upper cover, then the side cover. yes they have plastic tabs. I have an similar problem, mine is intermittent, works about 1/2 the time, i think its a connection. I used a 9 volt battery on the speaker to check it.

 

Thanks, I'll try this when I get home.