Marshall footswitch

[didi]

Need help with wiring a new jack to footswitch. the original stereo jack was cut off-idiots. I want to put a new one one. Will need a wiring diagram. Cable has 3 wires. Unit contains two switches.
Think its from a valvestate 100watter.

[Enzo]

I hope you mean a new plug. Jacks are female connectors.

The three wires are common and the two switch leads. COmmon is wired to the sleeve and the two switch leads go to tip and ring contacts. If you get the wires backwards of what you want, c\swap places with the two switch leads - either in the plug or in the pedal.