One problem related to rear window wiper washer switch has been reported for the 1998 Chevrolet S10. The most recently reported issues are listed below.
When you turn the windshield wipers on, they will work and then stop working while driving down the road, if you go to turn them for mist, they will go back and forth like they were on and not stop, if you put them on interment, they will work sometimes but they usually stay on until you pull over and turn the truck off and back on.