I need help understanding this diagram!

[stratamania]

It’s a 5-way 4-pole super switch, I’ve never seen it happen, which is why it took me so long to figure it out.

Was it actually touching the poles, or was a wire making an inadvertent connection, it just seems odd.

 

[JohnnyHardtail]

I had this kind of trouble before with a 5-way super switch when I installed it with s/c mounting screws that were too long. Two of the common terminals of the super switch were directly inline with the mounting screws. In this case the longer screws came in contact with the common lugs so they were permanently grounded. However i test for this kind issue, so it wasn’t a major drama.