So above the driver's seat, in an overhead compartment, is a reset switch. Behind it lives the brain. No 12V power. I pulled it out as far as the leads would allow, and did not find any fuse. FWIW, the red black power leads are inside a larger red "cable" with grey stripe.
I have looked in the DC distribution panel and under the dash, but I was unable to find a similar cable. Having been is storage for a while, I am concerned that a rodent may have chewed on wiring, but I have not found any evidence of that happening.
photo of brain location attached.