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Four Possible reasons...

Low brake fluid - check the brake fluid level in the master cylinder

Emergency brake is on - check emergency brake

Low brake fluid pressure - such as a broken brake line or a bad wheel cylinder. Check the master cylinder to see if it is empty. If you add fluid and pump the pedal you will probably see brake fluid on the ground or on the inside of the tires.

Possibly a bad master cylinder. - The fluid will stay full but you will have no or little brake pressure.

Could be air in the system as well.

BE CAREFUL If you happen to add Power Steering fluid or Transmission Fluid to the master cylinder instead of brake fluid you will destroy the system. Make sure you use ONLY brake fluid and clean the master cylinder cap off with a clean rag first so no dirt gets into the braking system.

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14y ago
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5y ago

Disconnect your battery and reconnect it and try pulling up on your parking brake.

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Q: Why won't the brake warning light go off?
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