Next diagnostic steps for E70 Power Tailgate not working?

[dchang0]

Hi, everyone--


I've got a 2008 X5 E70 3.0si that has a power tailgate that suddenly stopped working.


I don't think it's the battery, because the power tailgate does not operate even when the vehicle is running. The alternator appears to be working, as the running voltage is just above 14V.


The mechanized latch operates (tailgate will lock and unlock). The red button to close the latch is lit, but pressing it just causes a motor to make a noise and then the tailgate makes a little movement but stops like it's stuck.


I have pulled the two fuses on the chart: Fuse 99 (40A) and fuse 121 (5A), and both test okay.


Now, I'm lost. What's the next thing to check or do?


I will keep reading other threads but haven't found anything that goes through all the steps yet.



I have no idea how to test the powered struts, but I figure that's what I'd test next.


Thanks in advance!