No power to lift gate lock

So the lift gate power door lock actuator is inop?It worked before you changed the whole lift gate?Did the lift gate come with a actuator in it?This was a used lift gate I take it?

So did it work before the lift gate was changed?I Wouldn't see how leaving it unplugged would make it not work. Since everything like that is ran thru a computer it wouldnt be a bad idea to habe it scanned for codes. It woildnt show up in a free auto parts scan or a diyer scan tool. Also I would write down the codes then clear them and see if they come right back that way you can tell if they were set when it was unplugged?Unfortunately sometimes these issue require a scan tool a professional one to diagnose as well so you can watch switch input and output on the scan tools.