It works! I added a power supply plug to my black Russian Electro Harmonix Big Muff Pi fuzz pedal a while back and now I have added a 3PDT footswitch to make it true bypass. I followed a couple of things online, the main one is here. I also used this. And this.
Here is a before shot.
And here is the after shot. As I figured out what all the wires were and what had to go where, I put painter’s masking tape on each wire with a label. This made it very easy to solder everything back together with the new footswitch and to double check everything if it didn’t work. And unlike last time I started soldering things, I made sure I had plenty of ventilation!
The thing that took me a while to figure out was the fact that there are two ground wires. One on either side of the Output wire. Even cutting the trace on the board between the Inupt jack and the resistor was pretty easy. I used an ohm meter to test everything.
I still have to drill out a hole in the chassis for the power supply plug, but then it is all done. It was incredibly simple. I just had to go slowly…as well as double and triple check everything!