The brake lights work without the key on, so you have a problem with your brake light switch.
emergency brake light stays on
Defective or misadjusted, brake light switch.
The battery light stays on when the alternator is over or under charging. The red brake light stays on when the parking brake is set or the fluid is low. The abs light stays on when the abs computer detects a malfunction and sets a code.
brake light swith located under the brake pedal is stuck.
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brake light switch is broken or out of adjustment. brake light switch is located above brake pedal.
If you are referring to the brake light then the brake light switch is stuck.
With an ohmeter or a self-powered test light. Hook the two leads of your tester to the terminals on the brake light switch. Push down on the brake pedal and if the light stays off or the meter stays at infinity, the switch is bad.
check brake fluid
You will need to change the brake light switch. The brake light switch can be found below the dashboard on the drivers side.
You have air in your brake lines. Have the brakes bled.
The red brake warning light is an indication of low fluid, a loss of pressure, or the parking brake being set.The red brake light stays on when the parking brake is set, the fluid is low, or there us a loss of pressure.