Question about 1985 Oldsmobile Cutlass Salon

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I have a 1985 cutlass salon and wanted to know how do I stop my brake pedal from being so stiff. Right now I can't drive it because I have no brakes. The pedal stays stiff all the time.

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Replace the power brake booster.

Posted on Nov 04, 2010


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Brake failure

If you are talking about the brake pedal being stiff and too hard to push, then working easily again - it sounds like you temporarily lost the power assist. This will happen again and it is not safe to drive until properly repaired.

Many decades ago cars had no power assist and took much more foot pressure and much longer distance to stop. So your brakes were working, just not the assist.

The power assist is provided by a vacuum line from the engine. The likely causes of the failure are: stalling or stopped engine, leak in hose from engine to brake assist booster or leak in the diaphragm inside the brake booster. There are also other much less likely causes from brake fluid lines and the master cylinder. Regardless, don't drive knowing the brakes are likely to fail.

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When you release the brake pedal, there is a switch underneath the brake pedal that disconnects the circuit to your brake lights causing your brake lights to switch off. Sometimes this brake light switch will go bad and need replacement. If your brake light stays on after you turn your car or truck off and you don't want to run your battery down, you may be able to get down underneath the brake pedal and manually pull up on the brake light switch to deactivate it until you can get it repaired.
and i think you can make a diagnostic by yourself and the Autel MaxiDAS DS708 can help you

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usually a stiff brake pedal is good, but if it is excessively stiff, it is usually caused by the brake booster

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is your car a 79 or an 85?if it's a 79 you probably need to repace the dimmer switch on the floor,may be the same for a 85.

Jul 30, 2009 | 1985 Oldsmobile Cutlass Salon

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93 dodge dynasty brake pedal stiff wont apply brakes

your power brake booster needs replaced ,it work off engine vacuum and when the seal inside leak there is no power assist for the brakes

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ASE Mechanic here.
your right something is not right, wouln't drive get it towed to a shop or if you know a mechanic have him inspect it.

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you have got to adjust the brake light switch so it isn't pushing on the brake peddle see right now it is holding the brake down

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