OP again. Well, I replaced the ABS sensor on the right rear and no dice! Still had the same three lights. I scanned it again and now it produced three codes:
ABS open or shortECM control systemSteering angle sensor
WTF???? OK, at this point I gave up and took it to a repair shop. They have a guy there that came to them from Subaru. He ID'd the problem immediately as he used to see it all the time at the Dealer. Turned out it was packrats. They had jumped up on top of the fuel tank and made camp just under the top access plates which are located under the rear seat. Problem solved albeit at great expense. Maybe this will save someone else the annoyance and expense of taking it somewhere. Here's a couple photos.
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