[Iflylow]

This sounds like ABS. The humming noise is likely the ABS system. The usual culprits are bad wheel speed sensors. Each hub has a sensor built in, to change the sensor the hub must be changed.
Before changing hubs, carefully examine the wires going to each hub. Unplug and check the connector for corrosion. Then look for kinked or broken wires as far as you can see. Pay close attention to anywhere the wires go near suspension parts, or parts that move when turning the steering wheel. Start with the front wheels, problems are more common in the front.