A good portion of our harnesses are sub contracted out to the lowest bidder outfit out of Mexico. We have lots of issues with bad/wrong diodes, broken wires, pins that won't lock in place, improper crimp, or just plain pinned incorrectly. What is real entertaining is when you have an issue, and you pin out the harness and everything checks out with the DVOM, and everything works when the harness is slaved in just to find out that when the harness is installed and tied into place, a pin pulls back when ran according to the print. What makes the job fun is when the harness runs from the nose of the vehicle, then all the way to the rear wall, especially if there was a dead short, and all of the magic smoke is released, and melts the corresponding plastic air lines that travel down the same paths that the harness runs.