The tailgate CDL is powered via the roof harness & the rears via the toe-panel harness which is connected to the main harness under the drivers seat (white 3-wired connector mounted under the fusebox, the middle wire being purple & blue, methinks). The fact that front passenger CDL is working means that the module that controls the CDL is receiving feed from drivers door & opening the others( or at least trying to!). They are all powered by one fuse. Check that the white connector is OK under drivers seat. Failing that, maybe you'll need to remove door cards and try to free them manually.