The ABS started working again this afternoon.

I was on the way home, AC on nice and cold, and after about ten minutes of uphill highway driving, the light went out and I had ABS again.
When I got to my dirt road, I hit the brakes hard enough to activate it and repeated this about a dozen times!!! I got home and parked it, shut down, wait a minute, restart and it was still OK.

Just now went out and started it up, two hours later, ABS light on. hmmmmm

The only sensor in the cabin is the G-sensor. Maybe I'll pull up the console and have a look tomorrow.

The troubleshooting continues...