Ok, so first the light came on at 100,000 exactly. I watched it happen as I was commuting to work and counting the milage so I know its that.
Also I tried the battery terminal and it does not work for a mileage interval flag, belive me I tried.
That switch is very much an On/Off switch and has no effect on the ECU for my model (I checked the wiring diagrams in the manual). Also there is a thread around here where someone flipped that and then went and failed smog because the light never came on.
Also while the 94 was the first year that had the CA emmissions that was only in CA in 94 and was packaged with the 16V only. I wish mine was one of these but I have the 8V which was sold in CO so no CA emmissions on this.
Some 8Vs were Cali spec too, I believe.
I am not going to argue with you, but the switch is not an off/on switch. You are right that it has no effect on the ECU....it's only purpose is to make the light go off when it is turned on by a mileage interval.
If the bulb is not burnt out (or you don't have other wiring issues), the light will always light up when you initially turn the key on. I assume this is how "he" failed smog.....the light did not light up when the key was initially turned on.
I have repeatedly given you my info on how to correct it.....either take it or leave it. I'm done. Good luck.