As I looked at the switch, I saw the back screw had loosened and was laying next to the switch. As you pushed the light rod, the switch swung up and the rod wouldn't push the switch plunger properly. I performed a continuity on the switch and as per the service manual, the switch should keep continuity all the through the plunger's depression into switch. However, I get continuity initially, but when the plunger is pushed deeper into the switch, I lose continuity completely. So it appears the switch is bad.
I put everything back together and the door switch works as it should. Apparently, the rod only pushes the switch's plunger within the range that the switch gets continuity. I'm going to order another switch, since it failed the test as specified within the manual.
Thanks for the manual!