sounds like mud dubbers

[jim0207]

Yes I do mean the wasp, the mud dobber. I touch the break pedal and from under the dash I here a high pitch buzz. 10 seconds after I release the pedal the sound goes away. Were do I start looking?

 

[Daniel PErkins]

My guess would be the brake switch/combo cruise switch. The vacuum line feeding the switch is causing the buzz. Either disconnect or pinch off the line and see if the noise goes away. Could be a bad switch. Dp