Did a 60k service, now ABS, DSC, Brake lights are all on!

I did the '60k' service yesterday which included oil/filter change, trans fluid, diff fluid, brake fluid flush (using a pressure bleder) and a new fuel filter. I also pulled the pads at all 4 corners to apply sme anti-seize to the backing plates, as I had some squeeking under light pedal. And I put my Style 68s back on since there's no more need for the studless snows. I do all of this, get everthing bolted up and back on the ground, primed the fuel system, etc etc... and now the ABS, Traction Control (DCT), and Brake lights are all on, and the speedo has stopped working completely. WTF? I never disconnected a single sensor in the process, not even the pad wear sensors. I drove a few miles, still lit up like a christmas tree. Tried turning the car on/off, no change. Overnight I disconnected the battery, still no change. What am I missing? I don't have a code reader so I can't reset them, though I thought pulling the negative on the battery for a good 9 hours would do the same thing. WTF is going on, and where do I start looking? Brake fluid level is perfect, oil level is perfect, all appears totally normal. Help!