just bought a 1996 xj6 vanden plas. The windshield wiper switch on the steering column is loose and the wipers are sometimes able to use low med and high and its a lil fussy.Its now only working on the high speed now, does anyone know if its the switch or can it be tightned? Been looking online at the switches and the cheapest i found is 185 used there 300-350 new? any ideas thanks?