Hi. I've been searching but not fully grasping advice about partially failed control methods for the fully powered liftgate, in this case on a very low mileage '19 MKT Reserve. It's my friend's car, I'm helping out.
The bumper (license plate) button makes the door unlatch just a little bit but not lift upwards at all, it doesn't lift enough to get fingers under and raise manually and rather stays close while still partially latched to the hook. The interior cargo bay close button does not close the opened hatch at all, no response.
Note that the rear hatch liftgate (redundancy here for future searchers) opens and closes properly using either the key fob pushed twice or the dash button, no control issues there.
It seems that the motor is okay given that the "front" control methods work properly. So I'm looking to that rear switchgear and some aspect of them that instigate but yet seem to interrupt the opening cycle making its fail, while further also not initiating a close when liftgate is already opened.
From reading here, may I suspect there's some interconnectedness between the rear cargo and bumper switches? Is replacing just one of those the key to making both of them operate properly again, perhaps by eliminating some failure such as a short within that rear controllers system? Or, is there some separate powered liftgate controller board at the rear of the car that failed and causes this type of failure only related to the rear switches?
OR--is what I described how the outside rear bumper switch operates when the system is shut off using the control center? I thought not, and forgot to check this aspect, because the outside rear bumper switch (it's by the plate on the MKT, not in the handle like on my ex's '18 Flex) triggers a partial response rather than none at all. Would not "shut off" disable it entirely?
Thanks in advance for input from the experts.
The bumper (license plate) button makes the door unlatch just a little bit but not lift upwards at all, it doesn't lift enough to get fingers under and raise manually and rather stays close while still partially latched to the hook. The interior cargo bay close button does not close the opened hatch at all, no response.
Note that the rear hatch liftgate (redundancy here for future searchers) opens and closes properly using either the key fob pushed twice or the dash button, no control issues there.
It seems that the motor is okay given that the "front" control methods work properly. So I'm looking to that rear switchgear and some aspect of them that instigate but yet seem to interrupt the opening cycle making its fail, while further also not initiating a close when liftgate is already opened.
From reading here, may I suspect there's some interconnectedness between the rear cargo and bumper switches? Is replacing just one of those the key to making both of them operate properly again, perhaps by eliminating some failure such as a short within that rear controllers system? Or, is there some separate powered liftgate controller board at the rear of the car that failed and causes this type of failure only related to the rear switches?
OR--is what I described how the outside rear bumper switch operates when the system is shut off using the control center? I thought not, and forgot to check this aspect, because the outside rear bumper switch (it's by the plate on the MKT, not in the handle like on my ex's '18 Flex) triggers a partial response rather than none at all. Would not "shut off" disable it entirely?
Thanks in advance for input from the experts.