Sounds like it was just installed improperly. You should be able to move the line and the tie wraps so that it has more slack at the bend so it doesn't crimp. Look to see how some of the other cables, like the coax for the TV are routed. They shouldn't be crimping either.
2008 King Aire 4562, Spartan K3(GT) w/ Cummins ISX 600
2014 Jeep Grand Cherokee Overland 5.7L V8 Hemi w/ Blue Ox Aventa LX Tow Bar and baseplate, SMI Air Force One brake