Motor seems to operate ok, but when switched off it’s not parking consistently to fully down position. Any idea what can cause that?
Wipers wont’ park consistently
63fiberbuggy
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Motor seems to operate ok, but when switched off it’s not parking consistently to fully down position. Any idea what can cause that?
The wiper motor itself needs repair. There's a little cam inside the wiper that keeps power applied to the motor until it reaches a certain turn off point. My guess is that the cam is wore out on your wiper assembly.
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And that cam and gears are in the oval back part, which requires the whole housing to be separated. Not an easy thing to repair.
Here is what is inside:
![Image]()
The cam is molding into the green plastic gear and separates the points on the barrel resistor when assembled.
Here is what is inside:
The cam is molding into the green plastic gear and separates the points on the barrel resistor when assembled.
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596 Posts
the typical/common 1st gen supply vendors I‘ve used don’t show wiper motor repair parts on their webpages; suggestions where to locate a “repair kit” or specific parts needed? Tks
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Ordered a new motor & washer pump; might as well replace it all at once. Maybe I’ll circle back to repair the original to have as a spare, or sell to someone looking for OE parts.
If you choose to repair the wiper park switch, here is how I did it.
First bend the tabs that hold the two plates together. After bending them inward a little, the two plates will separate.
![Image]()
Like Mr. Kevin photos show, there is a contact that is called the wiper park contact.
![Image]()
Mine was bent and corroded. It was not making contact. I filed the contacts and bent the contact straight again with a needle nose pliers.
![Image]()
The green gear has a cam that opens and closes the contact. Put the gear on and spin it around to make sure the switch now operates.
![Image]()
I cleaned the gears and added a little grease to the gears. I applied silicon glue to the two plates to keep dirt out of the gears.
![Image]()
I bent the previously straightened tabs with a tapered round punch.
![Image]()
The motor might not stop like it should if you test it on the bench. The motor has too much inertia. It will spin past the park cam and continue to run. The motor needs the wiper transmission assembly and the rubber windshield wipers to dampen the inertia of the motor.
First bend the tabs that hold the two plates together. After bending them inward a little, the two plates will separate.
Like Mr. Kevin photos show, there is a contact that is called the wiper park contact.
Mine was bent and corroded. It was not making contact. I filed the contacts and bent the contact straight again with a needle nose pliers.
The green gear has a cam that opens and closes the contact. Put the gear on and spin it around to make sure the switch now operates.
I cleaned the gears and added a little grease to the gears. I applied silicon glue to the two plates to keep dirt out of the gears.
I bent the previously straightened tabs with a tapered round punch.
The motor might not stop like it should if you test it on the bench. The motor has too much inertia. It will spin past the park cam and continue to run. The motor needs the wiper transmission assembly and the rubber windshield wipers to dampen the inertia of the motor.
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Fantastic reply, as you always do! Clear steps/advice & photos that make sense; I appreciate that level of attention to details!
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596 Posts
UPDATE:
It’s been a few months since my new wiper motor from NPD was installed by a local auto shop. I also purchased a new washer fluid pump & new switch form NPD; everything was installed together. The only time wipers were operated was at shop, tested by mechanic. Fast forward to a week ago, and the wipers randomly came on and wouldn’t stop. I rotated switch & it would go into high, back to low, but with switch in off position they continued to run. I unplugged connector at motor.
I took car to shop this morning & Scooter said he’s seen it before; and I needed to swap the motor. Thankfully, a call to the guys at NPD (Charlotte NC) and they confirmed it’s under warranty. Next step is to pull motor & ship to NPD.
It’s been a few months since my new wiper motor from NPD was installed by a local auto shop. I also purchased a new washer fluid pump & new switch form NPD; everything was installed together. The only time wipers were operated was at shop, tested by mechanic. Fast forward to a week ago, and the wipers randomly came on and wouldn’t stop. I rotated switch & it would go into high, back to low, but with switch in off position they continued to run. I unplugged connector at motor.
I took car to shop this morning & Scooter said he’s seen it before; and I needed to swap the motor. Thankfully, a call to the guys at NPD (Charlotte NC) and they confirmed it’s under warranty. Next step is to pull motor & ship to NPD.
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