remove all three of the mounting bolts. This way you can take out the entire mounting plate and the light in one piece. Instead of just the light assy. by removing the one screw. The bolt on the top of the light will be a PITA. just unscrew the adjustment screw completly and bend the light down a little to get to the bolt. once you have the mounting plate and the light out you can crimp down on the back side of the screw with a set of vice grips to loosen the screw. I had the same problem and stripped the hell out of the screw. I personally replaced the screw with bolts on both sides so i wouldn't have the same problem again.