Why is my car buzzing or humming after i turn the ignition off?

Under the left side of your back seat is a fuse / relay box . When you first turn the key on the fuel pump relay turns on for a few seconds to prime the fuel system . That relay is in that fuse / relay box ,that is what your hearing . Does the vehicle start an run good , no problems other then the buzzing sound .The vehicle battery is also under the rear seat on the right side . How To Locate and disconnect Battery Buick Lesabre Pontiac Bonneville 00...

the buzzing is a bad relay , probably the main electrical shut off . Good Luck

when you state that when you turn key on the buzzing quits tells me its a ground problem. assuming the battery is fully charged and holds a good load. check your negative and positive cables close at the battery because the side mount battery cable ends seam to be causing a lot of problems for people. use a test light that can pierce the skin of the cable to be sure the voltage is going threw/

Shifts weird? Like high shift points or rough shifts?

The fuses that are buzzing, are these the ones you replaced? Sounds like a bad connection to the fuse panel, but the ones you removed are they fuses or relays. Did you have to repair any wiring or plugs for the window? Check the connection at the main window panel, if it has a bad connection such as not plugged in completely.

CONTROL MODULE-IGNITION 1996 Kia Sephia 1.6L MFI SOHC 4cyl The Control Module-Ignition is located: Under hood, driver side, front side of strut tower, rear of relay block, mounted under ignition coil

It could be the ABS. MY HONDA DOES THE SAME THING.
I took it to PepBoys yesterday and they could not connect to the
computer interface.They said I need to take it to a honda dealer
so they can connect and determine what is wrong with the
Automatic breaking system. The noise is the ABS motor
turning on and off.

Do you have headlight wipers? If so, wiggle the wiper arm and see if the buzzing stops.

There is an ABS fuse under the hood that you can take out, and the noise will quit. The noise is accually your ABS pump. They are kind of expensive.

This sounds normal. The engine cooling fan it set to contine to run after being shutoff. If you open the hood at some point and look at the layout, you will see the electric radiator fan in the front of the engine compartment, along with a note that says: caution fan may run w/o vehicle on.