Thank you Roger and Brian,
I only got a chance this evening to test the brand new CS277 and the existing one. They both test the same. Blue to blue is a short, even if the button is pressed. red shorts to either blue when button is pressed.
Since I am not able to attach a file yet, I will try to explain the diagram that came shipped with the WS469 switch first. WS469 white to neutral. Black to hot (live). Blue common to lamp. Red to red on the CS277. CS277 blue to black common to live on the WS469. The remaining blue shows as capped off (no connection).
The following is as quoted verbatim from the text instructions:
"Replace one of the existing wall switches with the WS469 Wall Switch (Master): connect the common wire to the black wire on the WS469 using a wire nut. Connect the two remaining "traveler" wires to the red and blue wires on the WS469, using wire nuts. If one of the travelers are red (they may be a different color) connect it to the red wire on the WS469. Connect the WS469's White wire to Neutral (NOT ground).
Replace the other existing wall switch with the CS277 Companion Switch (sold separately): Connect the common wire to one of the CS277's BLUE wires. Connect the traveler wire which you connected to the RED wire on the WS469 to the RED wire on the CS277. Connect the remaining traveler wire to the second BLUE wire on the CS277."
The text ambiguously mentions connections to two blue wires, but the diagram shows one blue wire of the CS277 unconnected. Nor does the text mention a lamp (load) connection. Very confusing.
I have it connected now without the CS277, jumping the blue wire from the WS469 to the light, making it effectively work as a stand alone master switch. As I said before, I have every wire available (including a hot wire already in the garage on the same circuit, supplying power to outlets there), in the remote (garage) switchbox. I have alligator clip leads ready.
Ivan