Neutral safety switch

The switch activates reverse when the plunger is extended all the way out , the comb has 2 high points on either side of a" ditch" , the high points are metal and activate the park and nuetral positions on the switch by pushing it in , the forward 123 are an intermediate arc on the comb neither all the way out or in, the "ditch " allows the plunger to extend all the way out activating the reverse lights. You didn't say why you were testing it , if you aren't getting reverse lights try adding a couple of fibre washers to space the switch out a little enabling the plunger to extend further , this is how we fixed mine , if the nuetral safety function isn't working then remove the switch and test it as they mentioned above . My parts guy can only get 1 size of switch from Standard and this seems to be the solution to the reverse light problem many are experiencing , I'm thinking the switch they are selling is a little long and probably common to some other product line that they manufacture for .