The right latch on my tailgate doesn't latch (close) when I close the tailgate. The door ajar light and dome light stay on and the car won't lock. If I reach back and pull the tailgate in the lights go off but if I push on the tailgate from the inside the right corner opens and the lights come back on. Can these latches be adjusted or lubricated? I can't see any damage to the latch. When I push it with my finger it will not click into the locked position like the latch on the left does. Any suggestions?