Bingo! gmercer and BrianS solved the problem for me! When I checked the bulb, it was a GE917 which is 12.8 volt, similar to gmercer's router, and Brian's thread about the 315-174 router shows that the wiring for a 315-275 is the same. I can just ignore the red wire for my install and straight wire the motor with the black and white wires to a common switch on the side of the cabinet.
Thank you all for your comments. This forum is awesome and I can't wait to start making sawdust with this setup, using the great info from this site!