Hey. my name is mitch and i have an 88 ranger xlt. the wiper speed adjustment dial dont work. if i turn it off full boar, they stop working all together until i turn it back. Fuse, Relay, what would it be??? Also wanna know where my cabin filter is. the air fan is blowin dust, pine needles, and random crap out all over me and the dash when i turn it on high.