Thanks for the reply. Checked all fuses, all OK. So I bought a used ABS module off eBay, advertised as good. Put in the eBay module, filled it & bled lines. Good news/bad news: GS-911 now sees ABS module, that's the good. But GS-911 now reports "17419: Rear ABS motor defective." Also, "17182: Pressure in front wheel circuit to high" (sic). A third fault, "17911: Defective rear light" went away when I replaced the factory 10 watt bulb over the license tag with a 21 watt bulb, for some reason. The brake light had a working & properly spec'd 21 watt bulb already.
I'm giving up on ABS until/unless Module Masters gets their rebuilding operation sorted out.
Thanks again schuppi & everybody in the forum community here