Thanks for your reply! The car is brand new and the speakers never worked. I checked the visible wiring and everything appears to be in place. It appears that the car was not supposed to come with rear deck speakers since it does not have the Bose system. The specs say 6 speakers -2 tweeters, 2 front door, two rear door. I looked on crutchfield and there was no option for rear deck speakers either.Check to make sure the front/rear balance on the audio setting isn't set to full front. I know of no other control to disable any speakers. If all is OK there, check to see if the wiring to the speakers hasn't become damaged or unplugged by large items placed in the trunk.