whats inside the foot switch?

[REGNAD]

i have a footswitch from GGG. it has 9 pins on it. Is this a 3pdt switch with commons in the middle?
regnad

[GibsonGM]

I believe so, REG.  Try testing the continuity of the poles using your DMM.  It's easy to misorient the switches so they're turned 90 degrees and don't function correctly ;o)   Typically, the flat blades are looked at so they're running horizontally...then the commons are middle, and poles are top & bottom from there.  Each up/down row is it's own pole, so you of course get 3 separate switches at once.