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OK, so this may be something totally normal, but there's an incremental buzz that occurs when I've been driving my BKO and then shut it down.

It seems to be in the engine compartment near the cab. It really is just a light "buzz"....on and off...no real pattern though. It doesn't last too long. Any thoughts?
 

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in the electrical world, low voltage leads to relay chatter. i would check your battery voltage when you hear the sound. if you're reading low voltage on your battery--that might be your culprit. could be a million other things i'm guessing as well.
 

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yo,
I have a garden hose section and use it as a stethoscope to help track down the noise source.
Sometimes, can tape or wire free end to a component such as the TAB/TAD Valves, Starter Relay, etc.
Beware of hot engine, belts, pulleys & fan, as applicable
 
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