Does anyone have any experience in removing and replacing the switch in the trunk that tells when the divider is up or down?

 

You'll need to pull two pins that hold the carpet to the bracket, pull with ease with something flat, putty knife etc, then the bracket is held on by two 10 mm nuts on the top of the bracket. A ratcheting wrench works well in this small area. Once that's free you can unplug the wire that goes to the micro switch. Reverse order for installation.