Funny to find another Kansas City member with the same problem that we came home to.
We came back after a ten day vacation and the Ody, while a bit harder to start, started but had the VSA, ABS, and Brake lights illuminated and nothing else.
The power sliders didn't work, the power locks would unlock (weakly) but not unlock. The power seats worked, but the memory settings didn't. Nav, Radio, sunroof, and wipers all worked, but the A/C didn't, etc
The battery read 12.4 across the terminals, and no fuses were blown anywhere on the main, drivers, or passengers boxes.
I disconnected the battery, then, on the advice of this thread, pulled the larger harnesses apart, blew them out with compressed air, and looked for corrosion.
After reconnecting the harnesses and the battery terminal, the dash lit up just fine, and all systems functioned normally.
The tip off to me was the VSA, ABS, and brake lights being on simultaneously in both the OP and my case.