Here's some additional detail: This is in a new house that was wired 'specifically' for fans. - The fan is the only new compnent. - The fixture worked previously for a 'bare bulb'. This had to be installed in order to pass building inspection. The fan installation is an 'after-the-fact' homeowner responsibility. - There are no other wires at the box besides the White, Black, Red, and Ground. - Wires are in the same sheath (at the switch), as best I can tell. [there is no attic access] - The previous ceiling fixture was wired to the white & red wires only. The same wall switch is wired Black & Red. - Black was capped-off in the ceiling fixture with a wire nut.
I'm off to return my faulty meter to Home Depot. I'll feel better about things when I can actually measure them.