This is a continuing problem when it rains. the intermittent setting on the windshield wipers is ineffective and i believe dangerous as visibility is significantly impaired. during moderate rainy periods, the interval, which is supposed to be sensed by devices in the windshield responds erratically, with intervals varying from over 30 seconds to about 2-3 seconds and then intervals in-between. this is particularly challenging when passing trucks on limited access highways where the passing time can be extended by traffic. requests for repair of this erratic operation have been made, but without resolution of the problem. i have been to the dealer twice and no resolution. *tr