In case anyone else should be searching this sort of glitch I should note for posterity that the first symptoms were turn signals flashing quickly as if one of the bulbs were done. But all bulbs were fine.
This went on for a couple weeks, and it happened more than it didn't but it was intermittent.
So if this starts happening to you and your 1150, swap the horn relay with the load-relief relay and see if the problem is remedied. If it is: go buy a couple small relays and swap out the bad one.
"So what makes this protest different is that you're set to die, Bobby?"
--May well come to that.
"You start a hunger strike to protest for what you believe in. You don't start already determined to die or am I missing somethin' here?"
-- It's in their hands. Our message is clear. They're seeing our determination.