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I once shared the driving of a Javelin from Cleveland to NYC. AMC used to tap into the vacuum line to run the windshield wipers. Early into the trip, the wipers started acting weird. They would go up, but not come back down unless you turned them off, which was done with a sliding lever.
Whoever wasn't driving would slide the lever up, down, up, down for hours. I was doing the "levering" when the lever came off in my hand. Luckily, it happened when the wipers were up because we found out that if you manually pulled them down, they would go back up by themselves, thanks to the vacuum .
We rummaged around in the back of this beater and found just enough wire to tie to the passenger wiper so that the passenger could pull them down, let them go up, pull them down, etc. Unfortunately, to make it work, we had to let our hand go part way out of the window. Highway speeds and 40? ? weather make for some cold-ass hands. We ended up putting our socks on our hands to keep them somewhat warm. We were wet, cold and dirty by the time we reached NYC. 30+ years later I found the following video and sent it to my best man, the guy I made the trip with. We still laugh about it whenever we get together.
These guys were lucky enough to have longer wire.