Do you have a scan tool that you can activate the ABS pump with? I'd start there, by cracking open that wheel cylinder, then activate the pump. See if it's pulsing out fluid like you would expect.
No, I do not. A while back we tried a $200 scanner from Amazon, and that was absolutely useless. No autostore seems to rent them either.
Got a recommendation for one? I'm currently benchbleeding the MC, but if that doesn't solve the issue I may have to try this.