The leveling switches should be 3/8 of an inch when encountering The magnet. the polarity of the magnets alternate, so if the bottom mag is north pointing up the next mag is south pointing up. the white paint on the mags is south. Also sometimes the magnets cause the metal they are attached to become magnetized, try putting some tape at the end of the magnetic strip. when you are at floor level all 3 led's should be lit. LRU, LRE, and LRD in the car panel board. upper left corner. Good Luck.