I would check the wiring connections under the dash. The plugs are notorious for making poor conections. I just recently eliminated my foot pedal. I installed to momentary switches on the console just in front of the shifter. The one on the right operates the wipers as long as it his held down, and the the one on the left operates the washer pump. The switches are black and nearly flush with the surface of the console. Much easier to reach than the floor pedal.