The 1200 Standard does not have the LCD dash, and looks just like the 81 and 82 1100 dash - with tach, speedo, like the one seen in the right side of this image:
This bike (the 1200 Standard) DOES have the exact same 7 volt regulator as the 1100, and it is located in exactly the same place (behind the light/fuel/temperature gauge cluster).
The Interstate and Aspencade, which have the LCD dash, do not have a separate 7 volt regulator, and drive the gauges directly off the LCD panel. The 83 GL1100 Aspencade (also with LCD panel) is the same.
This is according to the schematics that I have examined.
It's in behind the cluster that has the turn signal lights, oil lights, etc. on it. You remove the screws on the back of it, and pull the back off, and the regulator is a small gold-colored metal box mounted on the back, near the bottom of that cluster.
I know...the first time I went to go change mine, I couldn't find it, and was sure it wasn't there - but after being reassured by several people that it was, I went back and looked, and sure enough, there it was!
Ok I took the cluster apart again and did not find the voltage reg,but while looking the harnace over i did find a small box with 2 wires taped to the other wires. I could not find what this is on the wireing scem. Any thoughts
I wonder if yours has already been replaced once? The regulator definitely has three wires - one that goes to +12V, one that goes to ground, and one that screws to the back of the gauges, that is the 7V output.
Here's a picture of how it mounts on the frame - this is an 1100, but yours should be the same. It's the little gold box: