I have seen multiple postings about erratic windshield wiper & washer operation and the solution always seems to be the wiper motor pulse board. However, my issue is slightly different. When I went to use the wipers last fall (for the first and only time in the year I have owned the truck) they wiped once and never again. I checked fuses and swapped the relay with no luck. Just replaced the wiper motor pulse board but still no luck. Looking for advice on what to replace next (multi-function switch?) or how to troubleshoot further.