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Old 04-11-2012, 09:57 PM
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Wiper Schematic correct?

I have a marine type wiper that came with a wiring diagram, but I can't seem to make the wiper stop after a few minutes of running. It will stop and park if I run it for 30 seconds or so, but when it runs longer I cannot get it to stop even if the switch is turned off. I've included the original diagram and then I made my own diagram. I either have a wire connected to the wrong post or I may have a wire missing. It's very hard to figure out on the original schematic the path the current takes when shutting off. Can anyone shed some light on this matter?
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Old 04-11-2012, 11:30 PM
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Is the switch getting hot? i would try disconnecting the wire from the switch on the opposite side of the switch from the motor and see if it shuts off. This will tell you if the switch is sticking or not. Are you using selfpark? if so hook the "-" to the same wire i said to disconnect above and see what happens there. It sounds like it is failing to finish the selfpark sequence if it warms up or your switch is sticking. If you want me to draw out what i mean let me know and i will do it for you.
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Old 04-11-2012, 11:42 PM
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Silentfallen has you on the right track.
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Old 04-12-2012, 02:37 PM
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Quote:
Originally Posted by Silentfallen
Is the switch getting hot? i would try disconnecting the wire from the switch on the opposite side of the switch from the motor and see if it shuts off. This will tell you if the switch is sticking or not. Are you using selfpark? if so hook the "-" to the same wire i said to disconnect above and see what happens there. It sounds like it is failing to finish the selfpark sequence if it warms up or your switch is sticking. If you want me to draw out what i mean let me know and i will do it for you.
Did as you said, but the motor still runs. Switch is not hot either. The only way to stop the motor is to disconnect the battery and then if it is hooked up again it continues to run, which means that it doesn't go to park. A schematic from you would be very helpful in possibly solving this problem.
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Old 04-12-2012, 03:25 PM
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The theory of operation is:
When the S terminal is not grounded the motor is still grounded through an internal park end switch. When the motor is operating and strokes to the park end this switch opens and stops the motor.
When the S terminal is grounded the park end switch is shunted and motor continues to run.
(2) things could be happening: The park switch is not being activated (remains closed) causing the motor to continue to run. Can be caused by some mechanical problem such as a slipped cam etc.
Or if the motor is being operated with no load the motor will coast past the point where it opens the park end switch. Try to simulate a load as if the wipers are attached so the motor cannot coast past the point when the park end switch is activated.

vicrod

Last edited by vicrod; 04-12-2012 at 03:31 PM.
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Old 04-12-2012, 09:46 PM
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Okay, I put a load on the motor and it promptly stopped in park when the switch was turned off. Did it a few times and it still worked. Ran it for a longer period of time and no problems. What I did was put the wiper on and I guess that is what it needed, a load. Thanks very much to all. Another satisfied customer.
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Old 04-13-2012, 11:45 AM
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Good, glad to here it.

vicrod
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