Rear brake frozen. Assuming you do not have a heat source, small heater to aim at it for a while. If not that, I would think you could use some windshield deicer. I assume you do not have disc brakes on the back. There should be an access plug on the back of the wheel plate. On the back side it is usually an oval rubber plug at the top or bottom, varies car to car. Spray the deicer in up or down and I would think this might do it. Depending on age of vechicle, the cable running to the brake may be the problem.
its in your transmission
Brake fluid should have low freezing point
could be the cylinder on the brake caliper is locked up could be the cylinder on the brake caliper is locked up
If one back wheel has locked up I don't think the abs has anything to do with it. You may have a stuck/locked up parking brake cable or a stuck/locked up brake caliper.
It is a good possiblity the brake hose feeding that wheel is at fault.
the brake interlock press on the brake to release it
If it is locked up then replace that caliber and remove and replace all brake fluid in the system.
I think you need to supply some more info. Make? Model? Year? Locked after being parked? ...or while driving? Below freezing? Just any old schematic would likely be of NO value!
The switch is out of adjustment.
It could be a bad brake light switch. You have to step on the brake to shift it out of park.
very care fully or u will brake the flywheel
Front emergency brake? Do you mean a frozen cable? If front brake is locked may be a frozen caliper Emergency brake tied to rear brakes only