Epilog:

The backup light switch operates normally when tested with an ohmmeter, but when you place the circuit load on the switch it DOESN'T WORK!!!

I can't recall ever seeing this, but I talked to a buddy who has a lot of experience with electronics assembly, and he says it happens. In fact, it happened to him about 30 years ago on a mid-seventies 911 he owned.

The switch is on order (about 11 bucks) from my local dealer and should be in on Monday. I managed to remove the switch (press the plastic tabs together) using a paint can opener that has a little hook on the end, and an ancient Look Nevada ski binding tool! It took a few tries, but finally popped out.

I always admonish all to do diagnostics before replacing parts. In this case the diagnostics didn't lead to a logical conclusion, so I spent a lot of time chasing ghosts and scratching my head. I would have been better off just replacing the switch appriori, so in this case doing diagnostics sent my down a blind trail, but that's usually not the case.

I plan on doing a switch autopsy.

Duke