07 21v launch. While using perfect pass and also while not, both the needle gauge and the digital readout (if perfect pass is on and therefore dash screen shows 0 to 100 percent) only show the plate reading about 10 percent when I try to max it out full down and about 86 percent when I try to bring it full up. Is it actually moving full range and gauge is off or vice versa? Any way to reset it? Or anyone have a measurement I could stick a tape measure on it when on the trailer and check full up and down?