Is that a question? They work because that's the way your terrible car was designed to work? Do you mean HOW do they work?
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One of two things. Either the brake light switch behind the brake pedal. Or try wiggling or rotating your turn signal stalk in a circle motion. If the brake lights work when the turn signal stalk is wiggled then you need to replace the turn signal stalk.
its in the steering colume replace the turn signal switch
It may be the turn signal switch located under the horn in the steering wheel. Try holding up the turn signal lever with your left hand and apply the brake. See if that helps.
If the cable is broken and parking/emergency brake is still ON, then they are rusted in place ! - Your emergency brake system needs urgent work.
just had something similar like this done, they had to replace the wire harness inside steering wheel, because its all electrical. one of my turning signals and left side of brakes and back window light would not work.
my back brake lights don't work, but the brake light on the back door does what could be wrong
There seems to be a safety switch system, the brakes must be applied to release the transmission from park. Don't know location of linkage, if mechanical or electrical. Assembly could be in transmission of console. If no joy, then check wiring and connectors. Do brake lights work - then brake switch probably ok.
The brake lights and the tail lights are separate circuits. Check the brake light fuse, then check the brake light bulbs, then check the brake light switch.
The most likely cause is a bad brake light switch (if none of the brake lights illuminate) but if its only one of the brake lights, try changing the bulb. Even if they still work as running or turn lights because they have a double filament and may still work partially, but not as brake lights.
change the brake lights check the fuse check the brake light swtch
check the fuse for the brake lights, they have thier own. also check the brake light switch at the at the top of the brake petal
How do you replace brake lights