As I stated above..."As for the location of the safety lockout switch, it's bolted to the passengers side latch assembly inside the tailgate." With the tailgate open, place a screwdriver into the passenger side latch (acting as the striker mounted on the body) and push down to close the latch. Now you will be able to operate the window to move it in\out of the tailgate. To reopen the latch simply pull on the handle and the latch, being spring loaded, will simply pop back open. The switch thats mounted in the jamb is just a dome light switch and its on the passengers side as well.