Time for "Plan B." I powered up the air compressor, and when the pressure gage showed 100 PSI, I flipped the switches for the front and rear ARB air lockers. I was immediately greeted by a loud hissing sound as I watched the needle on my air pressure gage drop to zero. I later found out that I had routed an air line too close to an exhaust U-bolt, and after many miles of driving the heat had melted a hole in the air line. I wouldn't be driving out of this snow bank.