My back right wheel locked why and what can I do

Question edited for clarity.
Question moved to model category.

If it is a push toggle switch (push for on, push again for off), yes they are very unreliable as it all relies on a spring and a contact. Easy to check with a multimeter. It could also be a broken wire in the harness that goes from the door to the frame

https://www.google.com/search?q=2004+Chevy+Aveo.+passenger+windows+lockout+switch

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Most likely the brakes shoes have locked hard onto the brake drum on the right rear.

Have the car towed to a brake specialist and they will remove the brake drum and locate and fix the problem for you. I note others have had similar problems with rear brake lock up.

http://www.automotiveforums.com/t1072919-discuss2004_chevy_aveo_right_rear_wheel_locks_up_in_reverse.html

Click here to see.Here's the parking brake.

the code is in your owners manual, or call the dealership

so my understanding is you turned wheel and locked wheel and now cannot turn key ? need to turn the wheel some to remove the pressure off the lock and then turn key while holding wheel.

bushings available on ebay used them on my 2004 aveo and the work

This also happened to my 2004 Chevy Aveo. The drivers side rear wheel locked up when it first got extremely cold in December 2009. I had to change the rear wheel cylinder because it broke. They also found the rear wheel bearing also had to be changed. GM charges $180 for 1 rear wheel bearing. To make matters worse I had to order the whole backing plate which came with the rear wheel cylinder and a whole bunch of hardware.
If you look in the GM manual it says that you should flush and change your brake fluid every 24 months. My mechanic told me that moisture normal wrecks the brake cylinder. I'm not sure what happened to the wheel bearing but from now on I'll make sure to flush my brake fluid every 24 months.

These have a brake light switch that controls both the shift lock solenoid and the brake lamps, so chances are that if it is not a fuse then it is the brake light switch.

maybe a relay switch under the hood

Try these...the same thing happened to me last year and I found these. Mine was 3346; good luck.
1156, 1165, 1325, 2145, 2151, 2152,
2253, 2346, 2453, 2654, 3116, 3221,
3241, 3251, 3265, 3346, 3451, 3462,
4136, 4314, 4316, 4362, 4513, 4524,
4853, 5241, 5253, 5312, 5436, 5445,
5624, 5813, 6361, 6451, 6645, 8253