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Old 01-15-2021, 09:33 PM   #3
Corts60
Just here to tinker
 
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Join Date: Jun 2008
Location: Holland, MI
Posts: 3,697
Re: Would like intermittent wipers in my 78 GMC

I believe they had an option for intermittent wipers these years. Instead of the metal square knob for the wipers, there would be a little round black knob with an arrow on it. You turned it to adjust the intermittent. I don't think they worked very well....
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