On vehicles with intermittent windshield wipers, the wiper motor circuit board may fail and cause the wipers to stop working at times. Replacing the circuit board should resolve the issue. Some vehicles were recalled for this problem and some were not. You will need to check with your local dealer to find out if a specific vehicle was included.
Windshield Wipers May Fail Due to Faulty Wiper Motor Control Board on Oldsmobile Bravada
Average mileage: 134,400 (73,000–220,000)
9 people reported this problem
1998 Oldsmobile Bravada 86,000 mi, Visitor
the wipers fail to operate sometimes like there is a short
1998 Oldsmobile Bravada 100,000 mi, Visitor
Started with front wiper's not resting all the was down when off. Then a few moth later, wipers would get stuck. It was an easy inexpensive repair. Just bought a Dorman replacement board (with lifetime warranty) at Auto Zone for about $35. Just needed some silicone sealant and an Allen wrench. Took about 10 minutes.
1998 Oldsmobile Bravada 220,000 mi, Visitor
wipers won't work when it rains...go figure