buzz at start up, Amp bypass, air pump runs when car off

Cdr Cody

Registered
I'd posted earlier about a buzz at start up. Pretty sure it was the cell phone, unplugged box back by amp and seems to have stopped. Was messing with stereo, key out and the air pump kicked on for a couple seconds. Thought this would only run when car started.
Tried an amp bypass by scosche, cable connected cables going into amp, but didn't get any sound from after market head unit. Plays when connected to amp, but understand high output will eventually ruin amp. Any thoughts?
 
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