help diagnose whining noise

What other electronics are installed? CB, GPS, power booster, EQ, FM converter, 10,000 watt sub woofer amp, automatic electric antenna, dedicated memory hot wire. Is the noise left, right or center to the dash? Have you tried disconnecting the alternator? Does the radio play ok? That just sounds like a pulley squeak. If it didn't change with engine speed I would wild guess blower motor noise.

Did you try the water trick?