<SOLVED>Instant loss of power PLEASE HELP!!!

[YantisOm]

Hi everyone, I hope I'm posting properly.

I added a mid boost to my Big Muff Pi and everything worked fine out of the case. I had some trouble drilling into the stainless enclosure but after a few days I got it down, but NOW the power is acting up. Brand new 9V powers other pedals without issue. What happens is the power will come on when I plug up my guitar, but it immediately drains to nothing. The only way to get it to make sound again is to unplug/plug my guitar back in only
To have it drain once more. The foot switch works I know because when off bypass is functional.

There are no visible issues such as bad solder joints or loose wire connections.
Thank you for your time!

[aron]

Check the wiring of the input switch? That is weird.

[R.G.]

It is very likely that your wiring to the DC power socket is incorrect, or that you used a NON-isolated DC power socket in your case.

Use your meter to measure what voltage is where on that wiring.

[YantisOm]

I'm sorry, I should have specified it's a 9V battery. the dc jack was untouched. However, I did as you recommended and checked all my wires to find that my input cable was the culprit. It was shorting and turning off the pedal...  Thanks for your help!