Doing the final assembly on my l78 and the wipers wont park. They stop anywere you turn the switch off. any ideas???? thanks John ???
New or old motor? Inside the motor there is a parking mechanism and contacts. Usually this is the problem. It's been sometime since I've had to diagnose that issue. Your switch is good because the motor is getting juice. Check/clean all connections and grounds while your into it also.
The parking leg of the ground circuit goes through the brass ring in the upper/center of the motor. Once the switch is turned off, the ground then goes though the motor base, though the brass ring to the grommet metal>bolt>firewall until the parking breaker opens (internal). Make sure you have a good ground there.