there is a slot that it has to be pushed in which holds the switch be pushed in so it can not move only the part that goes around the brake pedal should move not sure about a '97 mines a'89 and '93 hope that helps
You may want to consider a hydro that can be run off your P/s pump and /or a 12v hydro pump milemarker makes the one I have and I like it. they make the ones on the Hummvee's
it's worth a look just my 2-cent