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Hey everyone.
I am working on a 1979 L82 for my neighbor. His wipers were working intermittently and eventually not at all.
Upon inspection i found a broken connection inside where the plug is (spring looking wire).
Anyway, i replaced the motor today and found that when the wipers are going up (at any speed) they freeze and require manually moving the wipers to get them to move.
If i take the drivers side arm completely off, they will work but do get very slow in the same spot on going up.
I also tried this with using only the drivers side wiper...same situation. If i take the wipers off completely, the motor looks to be spinning at full force.
Everything has been greased and i tried multiple arm positions to no avail. any insight? Also to note i have a new ground going straight to the wiper body cover bolt from the plenum and have tried several locations on the body with no change.
Wet the window and try again, lots of resistance with good blades on dry glass.
If you haven't returned the other wiper motor and want to replace the burnt switch assembly you can find many for under $30.00 and shipping on ebay.
1975-1982 GM #4960755
Examples Link: https://www.ebay.com/sch/i.html?_fro...60755&_sacat=0
You may want to read the Wiper testing procedures from Willcox Corvette. The problem could be in the Transmission, I know he mentions, disconnecting the “ball Joint” and watching the motor operate with out the wiper arms attached. They also show the correct locations (elevation) of the wiper arms on the windshield.
Thanks for the info, i was way off on the wiper arm settings in comparison to the willcox instructions.
I set them right and applied some window cleaner and they did function properly. Another thing to note: after all of these tests the battery is to low to even start the car (he doesn't drive it much) So i will try again with a fresh charge and assume they will work 100%.
Wipers getting stuck going up
