Having a delay in my painting/coverage here and there on my 2630 display. Tractor is hooked to NH3 applicator. When the wiring from the applicator is hooked to the tractor, display automatically goes to “AUTO” in the recording source and grays the box out so no other options can be selected. There is a whisker switch on the applicator which is wired into the harness that connects to the tractor. It will paint perfect one pass then the next time or two take 3-5 seconds to start painting once applicator is in the ground. Next pass it might work fine again. Failing whisker switch or something else? Not sure how often those go out. Thanks in advance.