My guitar or amplifier only produces clean sound even with pedal

[Brad1]

Probably the output of the guitar was so low that it stayed clean.

That's what I guessed would be logical. What isn't logical is that, apparently, he said the problem mysteriously corrected itself for a while at the exact time as a cable swap. Illogical and improbable, but not impossible, I guess.
And, I may be wrong, but I think it's improbable for the switch to be bad in all three positions. One or two positions (either PU/both PU) , I can see because the 'both' setting may introduce the fault of one to the other. A fault in the entire circuit beyond the switch, I can also see.

Weirdness.

Brad1

[kurtdaniel]

I think there may be some error in the signal chain. There's almost 0 chance that ALL those distortion units were bad and they should produce distortion on their own no matter what the amp settings are. In other words, nothing about the amp can keep a distortion unit from making distortion. Have you read the user guide for the distortion units you've tried? You could research gear and settings for known players on line for some idea of how some players set up their gear.

i tought it was the switch... i am not 100% sure, but i guess mine has the prob with and without buffer...

[David Schwab]

i tought it was the switch... i am not 100% sure, but i guess mine has the prob with and without buffer...

Please stop posting fake responses with that guitar lesson link. I've seen you do that several time already.

[Chuck H]

No one here is apt to take lessons anyway. Otherwise we'd stop dicking around with our $h!t and start playing it instead