windshield wiper stopping issue
Lately when shutting off the wipers instead of the wipers homing to the usual place at the center edge of each windshield they stop wherever they happen to have been when they were shut off. Any sugg...
Forum Discussion
MEXICOWANDERER wrote:
Wiper motors have battery power supplied directly to the motor as well as ignition power.
When the wiper switch is turned off, the battery power continues to supply the motor with power until the wipers arrive at their resting place. Inside the gearbox is a limit switch oriented to shut the wipers down when they reach the PARK position.
A broken limit switch inside the wiper gearbox would cause this. So would a fried wiper pigtail battery power terminal. There is no way to defeat the auto park feature except to turn the key off while the wipers are in action. So, the clue is to check battery voltage at the connector to the wipers. It's time to grab a 12-volt test light and access a factory wiring diagram. Blind parts replacement try-it-and-see is a poor diagnostic substitute.
Hey Mex, I think you contradicted yourself a bit. The wiper motor has switched power (from the wiper switch) and ignition power but nothing directly from the battery. That's how you can defeat parking, like you said, by turning the key off before they park.
Regardless, the park switch is almost certainly the problem and usually means buying a new wiper motor unless you're handy enough to take it apart and clean the contacts.
