jchonroad

South Berwick, ME

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After traveling for several hours in the rain the other day, with the windshield wipers either on "intermittant" or low speed, they wouldn't shut off or go from slow speed to any of the intermittant settings - they would go to fast speed.. About the time that it finally stopped raining, we had the opportunity to pull into a rest area for lunch. Wipers stopped (and went to the park position) when ignition was shut off. After about an hours break, when we started up again, wipers are on and still no control. Only way I could shut them off was to pull the 25A fuse. (Thankfully, didn't need them again that day.) This is the second time that it's happened. Next morning, put the fuse back in, and all is operating normally. FWIW the control module was replaced about a year ago, due to an entirely different problem. Hopefully someone out there may have an idea what the problem is.
My thought is the either the motor or control module is overheating and causing the problem. My (gut) solution is to install a toggle switch in the circuit, on the load side of the fuse, so I don't have to stop and pull the fuse every time that it happens.
This is an'05 Workhorse W22, as shown in my signature.
Anybody got a suggestion ?
Thanks for the help.
John
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spoonman

Dalton Ma

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Have read on workhorse owners forum about water getting into wiring harness or connectors. Check out the forum and do a search there.
Fairly commom on some units.
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7521

home

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Evey time this gremlin shows up it turns out to be a faulty wiper motor assy. Its happened on a dodge intrepid and a gmc truck, same symptoms.
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PaulJ2

Northwest Oregon

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Usually it is a faulty park switch assembly, and yes it is usually part of the wiper motor/gearbox assembly.
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Up&DownDeCoast

Rockville, MD

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Happened to me a couple of years ago. Wiper relay is stuck. Pull the wiper relay out of the socket tap it a couple of times and put it back. It's located by your left foot under the dash on the driver side. That should do it. If it continues you may need to replace it.
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mccsix

Pensacola Florida

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Water in the connector. Dry it out seal it with silicone and set the wiring & connector in a vertical position.
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fantasy islander

Grosse Ile, MI 48138 U.S.A

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Hi,
There is a plug/socket connector that can be exposed to
water through the grille that will short and keep the
wipers on as long as it's wet. Seal it (tape should work),
and you should be O.K.
Joe & Cathy Sikora
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Gadget Guy

Calgary

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PaulJ2 wrote: Usually it is a faulty park switch assembly, and yes it is usually part of the wiper motor/gearbox assembly.
X2. I had this happen and did all the things suggested on this post. Finally removed the wiper motor, took it apart and the plate from the park switch had moved out of place. Put it back in place, put it back together and it has work fine ever since.
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camperkids1025

Bel Air, MD.

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spoonman wrote: Have read on workhorse owners forum about water getting into wiring harness or connectors. Check out the forum and do a search there.
Fairly commom on some units. This is very true. Driving in the rain the wire harness and connector behind the grile gets wet. The easy fix is to clean and dry and seal the connector and move the harness and connector as high as you can to prevent the rain from getting to it I hope this helps... Jim
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jchonroad

South Berwick, ME

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Thanks folks. Looks like I start with the connector and the relay. The connector is up fairly high, but we were traveling in some heavy rain. Souns very feasible.
Thanks for the help. I knew I could depend on the fine folks on this forum.
John
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