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Second generation of the Toyota 4Runner.

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Why are my Brakes hard to push all of a sudden?

My brakes have no play all of a sudden, very hard to stop even pushing as hard as I can. The blinkers went out at the same time. I've checked fuses and none blown, wipers also just cut out. 95 Toyota 4runner 4x4

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That's gold. Thanks Will


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Will, the blinkers and the brakes are not connected. If you are having to use a lot of force to push your brakes, you have lost your power assist. here is how your nrakes are supposed to work When the brake pedal is depressed, a vacuum builds up in the booster which amplifies the pedal force, pressing on the piston in the master cylinder. The piston movement raises the hydraulic pressure in the cylinder. This hydraulic pressure is then applied to each respective brake cylinder and wheel cylinder, and acts to press the brake pads and shoes against the rotating discs and drums. The resulting friction converts the rotational energy to thermal energy, stopping the vehicle. So if your brake booster fails, you will have to apply more force. So, it is possible that your Booster push rod is out of adjustment or that you have a vacuum leak on your booster system. so, first check your brake booster


(a) Depress the brake pedal several times with the engine off, and check that there is no change in the pedal reserve distance.

(b) Depress the brake pedal and start engine. If the pedal goes down slightly, operation is normal.


(a) Install the gasket on the master cylinder.

(b) Set the SST on the gasket, and lower the pin until its tip slightly touches the piston.

SST 09737–00010

(c) Turn the SST upside down, and set it on the booster.

SST 09737–00010

(d) Measure the clearance between the booster push rod and pin head (SST).


0 mm (0 in.)

(e) Adjust the booster push rod length until the push rod lightly touches the pin head.

For your indicator, it sounds like a bad relay.

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Check your belt and the pulleys, sounds like the belt is worn or loose. Your alternator and the pump both are powered from the belt. Also while your under the hood check the fluid levels in your battery, brakes & power steering.

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Actually they are connected. Most likely the brakes stopped working because the windshield wipers are taking up too much power from the central unit. And vice versa. Try switching out your manifold plugs and it should fix both problems.

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Sounds stupid but where are the manifold plugs


Brake boosters operate off of vacuum... they don't use electrical power at all... ABS would, but ABS isn't the issue here. Blinkers and windshield wipers have nothing to do with vacuum. That sounds like a bad relay, a blown fuse, or a bad switch on the column. The brakes losing boost is a vacuum problem, most likely. And what "manifold plugs" are you referring to?


@Darren Snell if you're having an issue please post a question about what is going on so we can help you. The answer you're commenting on makes absolutely no sense, and people other than the poster won't see your comment unless they go looking...


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Will zal eeuwig dankbaar zijn.

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