Originally Posted by RustyAxeCamp
Co-workers 2009 Grand Cherokee thinks the liftgate is ajar and it isn't. Can't get the dash alert to go off.
Tried opening and closing the gate, the rear window and the battery disconnect. Nothing changed.
I know this post is old.. but I do have an answer for you, or anyone else who knows how to use the "SEARCH" function and finds this thread with the same problem.
I had this same problem on my jeep. Pissed me right off, it would set off the alarm on the jeep thinking someone was breaking in as it was registering the rear hatch glass opening.
It turned out that the harness plug was corroded and wasn't making a 100% contact all the time. So I cleaned it out and it seemed to fix the problem. I'm not sure how it was getting corroded like that, but it was. Check the switch area. Easy fix. Hope this helps someone.