Yes, generally it is 12v 21w.
In many cases, the brake light and the turn signal use the same bulb.
the turn signal switch sends current to the turn signal flasher. it then goes to the bulb. The turn signal switch will turn on the turn signal and when the brake is applied it cancels out the brake light as it is a duel element bulb. 1 element is for brake and turn and the other is for parking lights. you can not have a blinker and a constant feed to the same element of the bulb at the same time.
Since most brake/turn use the same filament in the bulb(1157) then if the turn signal switch is bad or offset then it will effect the brake lights.
depends on the vehicle, some yes some no
Check to see if the brake lamp and turn signal lamp are the same bulb. If so, its a bad bulb. See sources and related links below to lookup bulb information.
Many cars use the same bulb for the brake and turn indicator. Seems like one is burnt out. Have someone step on the brake and see if one of the brake lights does not respond.
In 1984 Corolla sedan and coupe the brake lights are mounted in the trunk lid. Just grip the socket and turn counter clockwise 1/4 turn and the bulb and socket will come out, grasp bulb and another 1/4 turn bulb will come out. Sylvania Part № 7443LL 2 filament bulb (same bulb is tail lights)
the bulb with two elements in it is the turn signal and brake light bulb
Take off the lens or take off the housing from inside the trunk. Push in bulb & turn 1/4 turn. Get bulb at auto parts store with same number. Opposite to reinstall.
The turn signal and brake light use the same bulb. When you get a fast flash, it is from a reduced electrical load being placed on the flasher unit due to a burned bulb. Replace the bulb and this should fix your problem.
check the light bulb same double element bulb for both lights
Just turn the housing the bulb is in and pull it out. Remove and replace the bulb the same way. For the rear lights, you have to push on a tab to release the housing the bulbs are in.