SOLVED dual pedal build - one led won't work

[PangeaDestructor]

This is a Breakfast Audio Big Nothing (squarewave distortion) with a SHO in front of it. Pics attached, I cannot get the LED on the right to work. I've tested it and it lights up in diode test mode with the DMM. Anode is wired to pin 4 on the 3pdt, i've attached the kathode to the center pin and now it's wire to the ground inside that electrical tape.

It sounds amazing, totally functional except for that LED.

 

[PangeaDestructor]

Wait, is pin 4 just a ground for the kathode, and I've got it backwards? If so, where would I hook up the positive lead so that it only turns on with the switch?

 

[Stickman393]

Looks like you're switching ground to either a connection to the anode of your LED or an empty terminal.

An easy fix would be to bring the cathode to where your anode is currently connected, and connecting the anode with the current limiting resistor in series directly to the power supply, or any other spot with +9V.

That way, you will be switching the LED by making and breaking the cathode's connection to ground.

 

[PangeaDestructor]

I grounded the led at the 3pdt, attached the anode to 9v, and it's all good. everything works. not sure how i got that mixed up.