Power on reset will not change it.
Between my 91, my 92, and my 2 95 Kicks, the switch was in at least three different locations, but all in the general area of the speaker, in front of your left knee.
On my 91, I pulled the speaker - I think it was just a slide switch in-line, in the harness. On my 92, it was actually mounted by the speaker. On my 95's it's mounted in a location, where I can pop the lower trim panel, and flip the switch while I'm driving it.
The light comes on at certain mileage points, and if you don't flip the switch, it'll go back off at the next mileage point (like 80,000, 120,000, 150,000 - I forget, but I know 120,000 is one of them).
You won't get the error codes to flash, unless you have the jumper properly installed in the diagnostic port (and I was surprised to be reminded recently, that the diagnostic port is different between a 93 and a 95). I carry a paper clip in the glove box for this.