my wife’s buick wipers stop working. Motor tried to move the wipers, but they would not go all the way up the windsheild. I’m in the driveway, out of ideas. I started tapping on the motor while i was debating on whether to go buy a new motor. Tried the wipers one more time. They worked. Did tapping fix the problem, or is this just a temporary repair?
There may be a loose connection in the wiring to the motor or there may be a current overload problem and the circuit breaker reset allowing the motor to work again.
Replace the pulse board portion of the wiper motor assembly. It is sold for about $25 at parts stores. Very common problem on this era GM vehicle.
The last time I had a “dead” wiper motor it was just a really dirty electrical connector which I cleaned up & was on my way. Make sure its not as simple as that before doing anything else.
If its not the connector then it is likely the motor & the tapping “fix” will likely be temporary.
It’s the pulse board. TX is right. They are cheap and easy to replace.