I have an 1992 ford f150 with the intermittant wipers. When I use the washers the blades go and never shut off. When I turn it to intermittant the wipers never pause. When I go to low they work fine and when I go to High they work fine. High beams work and flashers work fine, switch is brand new!!! Any help would be greatly appreciated.

 

If the MFS is new, then it's junk. Return it for refund & buy a better one - I recommend MotorCraft, Echlin, or BWD.