Hey, glad it worked for ya and that it was that simple to fix. Nothing like wipers that don't work, especially with all the salt and slush flying around.
Best thing I found was to completely remove all the slush/snow/ice from under the cowl. There's plenty of room down there for water to sit, but it can also drain from the lower slots.....the slush and snow can't.
If you have a garage, use a hose to get all the crap from the cowl and then park the truck in the garage. This will give the water some time to drain out and not freeze up.
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