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...
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It's a limit switch over-ride. To test the "theory" yourself, grab a test light go to the wiper motor and stab wires or stick the probe into the connector block. Yes, chopping off the ignition switch does stop the motor.
Shut off the switch when wipers are in motion. They stop. Shut off the wiper switch then turn the key back on. The wipers park with the wiper switch turned off.
Many switch/park motors operate with a battery hot going into the motor. Then a "relay trigger" comes from the wiper switch to a genuine relay. This powers the wiper motor. Shut off the switch and the relay plays dead. Something needs to over-ride the relay that now has no power to the coil nor going through the power points. The battery voltage only powers the wiper motor until the cam opens the limit switch contacts. The relay over-rides the limit switch - when key is on and relay is operating. Yes this means 2 fused circuits. One for power, the other for the switch.
The test light will reveal all :)
Shut off the switch when wipers are in motion. They stop. Shut off the wiper switch then turn the key back on. The wipers park with the wiper switch turned off.
Many switch/park motors operate with a battery hot going into the motor. Then a "relay trigger" comes from the wiper switch to a genuine relay. This powers the wiper motor. Shut off the switch and the relay plays dead. Something needs to over-ride the relay that now has no power to the coil nor going through the power points. The battery voltage only powers the wiper motor until the cam opens the limit switch contacts. The relay over-rides the limit switch - when key is on and relay is operating. Yes this means 2 fused circuits. One for power, the other for the switch.
The test light will reveal all :)
