Dear Chuck, Jim, and mid-60s Buick caregivers,
Thanks for your prayers and hopeful thoughts!
I finally have some news about my trusty wagon. I normally take her in to Orinda Classic Car Center over the summer so that they can give her the once over. With all the troubles I've been having that didn't happen until early November. Here is a photo of her headed to the service bay:

She got a lube and I have switched her to PennGrade semi-synthetic oil:
https://penngrade1.com/products/high-performance-oils/penngrade-1-partial-synthetic-high-performance-oil-sae-10w-30/Aside from the usual quirks of a classic car, she checked fine -
but . . . . . . . . . .
We had a threat of rain for the day she was supposed to head over so I did my duty to winterize the wipers -
Oops! No wipers - absolutely dead. Fortunately, I was able to dodge the drops and since she was over there I asked the crew at Orinda Classic Car if the could investigate. Back in 2013, I had upgraded Biquette to an interval wiper system sold by Detroit Speed. I thought there was little choice but to replace this system but the plot soon thickened.
The mechanics immediately recognized the wiper motor to be similar to one used on GM trucks in the 1980s. As it turns out, those motors have a logic circuit that were notorious for failing even immediately after the factory. Give the gang credit, they hunted around and narrowed it down to the exact model of wiper motor. They were able to then purchase a replacement locally.
Since they had confirmed that the motor itself was working fine, they tried to simply swap the logic board. Well that -
sort of - worked. All the functionality was back. However, instead of parking the wipers against the cowling, the wipers are being parked on the left-hand side. This was even more mysterious since back in 2013 there was a similar problem when the motor was initially installed and we had to send it back to Detroit Speed. A little more detective work revealed the problem. It turns out that Detroit Speed had made a few modifications to the stock circuit board. Those tweaks to the electronics appear to have changed the parking position.
There weren't any easy choices so I took Biquette home with her wipers parked on the left:

I contacted Detroit Speed to see if they might have some old motors laying around, but after 10 years the answer was no. So I'm going to have to bite the bullet and upgrade to the latest version of the Detroit Speed after-market wiper system:
https://www.detroitspeed.com/products/electrical/selecta-speed_wiper_kits/parts/121601I had been planning to do this for a long time actually. This newer model adds a built-in wiper which obviously is a real plus. I have already incorporated the washer bottle and have remaining 1965 specific hardware add the washer feature. Better still, the new Detroit Speed switch would work with the existing 1-speed wiper knob as you can see in this video:
https://youtu.be/_3BX8QH8CZYThe trouble is that I will have to once more create the customizing adapter so that the Detroit Speed switch fits into the 1965 Buick A-Body dash. This was a real pain back in 2013. So much so that I had forgotten how I did it! I had to look up my posting on that
"forum down the hall" to recall what I had done:
https://www.v8buick.com/index.php?threads/modifications-to-a-detroit-speed-selecta-speed-interval-wiper-system-for-a-65-special.270488/Obviously i can't take on this project for a while, but when I do, I'll be definitely in search of some good advice to pull off this rather tricky
"mod."Thanks again for all your support!
Edouard