OcTico

I have a parasitic draw. I drive the car home, park it and turn off the car. I hear a high pitch humming sound coming from the engine bay (when car is parked and turned off). The high pitch humming sound will be stop after a few hours. I hooked a voltmeter and saw that something is pulling power 2.5amps. I started checking fuses: 1. Removing fuse 86 sounds stops power draw stops 2. Removing fuse 90 sounds stops power draw stops 3. Check interior fuses nothing would stop the power draw. Any thoughts on what can be causing power draw?