TrueGS300

The rear doors only manually lock and unlock. The fronts and rear hatch work fine from both the key fob and pressing lock and unlock on the front door panels. Is there anything both rears have in common that would cause them both not to work? Windows all work fine.

Bparlo

Potential solution (I don't know what could cause this issue, sorry)

I have the same issue with my right rear door. I'm not sure what causes the issue, but pressing the "unlock" button a few times always seems to get it for my car. Maybe it's some mechanism that gets "stuck", and pressing the button a couple times gets it unstuck?

Best of luck

Nad1370

Most likely weak/failing door lock actuators or more like the motor inside the actuator.
Contacts wear our as i found out when i opened mine up.
Sometimes it'll work or slowly work. <--- cold days work better.
Most times not, esp in hot days.

Simple test bulb or test light check if i was getting power to actuate the motors when door locks were pressed.
Just to make sure it wasnt a wiring issue.