The meter was set to auto range and it saw nothing. I tried to check the amps, but nothing there either. I have a two standard Fluke Meters (model 77 and 87).
I think I have resolved my original problem though, I forgot to swap over the rear ABS rings when I installed the new hubs. I thought they came with them.
Still, it would be nice to figure out how to test individual wheel sensors with a simple meter if possible. I have access to a scope and I may give it a try as well.