My remote fob can lock and unlock the 4 doors. The door switch will also lock/unlock all 4 doors. When I push the "REAR" button on the remote fob, the rear barn door will not lock or unlock. I tested the actuator in the barn door and it is functional when I jumper 12v to the terminal of the actuator. I can make it retract and extend by switching polarity. Pins from actuator plug to flat contact plate on door show continuity on both wires. I can hear the relay tick under the dash when I push the "rear" button. Is it time to replace the relay under the dash? I removed the relay ( potter brumfield VBA 2002) and found that this is the relay that controls the 4 doors. Does this same relay control the rear barn door actuator? Appreciate any tips how to chase down this issue - Thanks !