Question about 1993 Ford Mustang

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1993 ford mustang brake pedal goes down on its own and brakes

1993 ford mustang brake pedal goes down on its own and starts braking.
replaced brake hoses both front and installed rebuilt master cylinder kit. no change. Wire tied a trampoline spring to pedal to keep up and brakes work fine otherwise. Any ideas?? thank you in advance. RonB

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Check the vacuum brake booster and check valve maybe there is a problem there that is amplifying the vacuum inside the booster and applying the brakes. I hope this helps, let me know.

Posted on Aug 05, 2010

  • Jeff Hammack
    Jeff Hammack Aug 05, 2010

    Also the booster may be broken internally.

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You have a short in the brake system wires. Id start disconnecting everything one at a time until the dimming goes away. Then that component will be your issue. Whether it has failed or the wires going to it are shorted will depend on diagnostics and what it shows.

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My 98 ford mustang is stuck in park


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How to replace brake pads on 1998 ford mustang


break lug nuts loose
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1998 ford mustang will start but will not shift out of park.


probably the brake pedal switch (mounted on the brake pedal lever) starting to fail. it releases the shift lever and controls the brake lights coming on. you will need to replace this.

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It is on the steering column, but those rarely go bad. dont forget to accept the solution.

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