Question about 1990 Toyota Pickup

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Brake warning light is on, emergency brake is ok. Is brake cylinder at back of engine on driver side? Do I just add brake fluid to the fill line? Is there a particular kind of brake fluid to use?

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  • DOUG BURSEY May 11, 2010

    yes use dot 3 or dot 4 brake fluid, don't use dot 5 in this model. the brake master cylinder and fluid reservoir is in the rear left of the engine compartment, and yes fill to the fill line. however, you should never have to add fluid to the reservoir unless there is a leak, or severe lining wear either of which would require service to repair and then fluid. hope this helps you

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If the fluid is lower use dot3 brake fluid.There is a sensor in the master cylinder for the level.If the light goes off then have your brakes checked out if your pads are low the the calipers will be moved out when this happens the fluid level will drop if the calipers are push back in after brake pads are installed the fluid level will go back up i hopes this helps :)

Posted on Jan 31, 2010

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The Brake warning light comes on. I checked the brake fluid level in master cylinder & it was okay. The fluid looked dirty. Please help


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Can't find where to add brake fluid or where to check brake fluid level.


there is your brake master cylinder on the drivers side under the hood. if you open the hood and look at the car it is driver side in the back of the engine compartment it will be a silver or black aluminum object with brake lines atached to the bottom of it, attached to the top of it is a squar/oval container with a metal band over the top of it once u see it you can telll witch way you need to push the band and it will slide off the top of the resevior that is weere you check and fill your brake fluid

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My brake lights stay on after I turn off the car


Hello,

If the light is on all the time, it could mean you simply forgot to release the
parking (emergency) brake. The brake warning light remains on when the brake is set
as a reminder. If the brake warning light remains on when the parking brake is
released, then something is amiss.

In some cases, the brake warning light may remain on if the switch on the parking
brake pedal or lever is misadjusted. Nothing is wrong with the brakes and a simple
adjustment should fix the problem.

If the brake warning light comes on when you apply the brakes,
or is on continuously, it means that hydraulic pressure has been lost in one side
of the brake system or that the fluid level in the master cylinder is dangerously
low (due to a leak somewhere in the brake system).
In either case, the fluid level in the master cylinder should be checked.
Adding brake fluid to the master cylinder reservoir may temporarily solve the
problem. But if there's a leak, the new fluid will soon be lost and the warning
light will come back on.

Brake fluid leaks are serious because they may cause the brakes to fail!
So avoid driving the vehicle until the system can be inspected to determine what's
wrong. Leaks can occur in brake hoses, brake lines, disc brake calipers,
drum brake wheel cylinders or the master cylinder itself.
Wet spots at hose or line connections would indicate a leak that needs to be fixed.

Leaking brake fluid can also contaminate the brake linings,
causing them to slip or grab. The uneven braking action that results may cause the
vehicle to veer to one side when the brakes are applied. Brake shoes or pads that
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Hope this helps.

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Warning light consisting of just the word "BRAKE" and no picture--what does it mean?


find a good straight away and hammer the brakes. if brakes feel solid. check you brake fluid level at brake master cylinder engine bay, drivers side firewall. if fluid level is ok unplug the level sender at master cylinder resevoir-if this resets the light it is the switch in the master cylinder. If not unplug the switch attached to the e-brake lever.
if the brake feel spongy or fluid is low check for a leak in the hydraulic system.

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WHAT DOES THE ABS LIGHT MEAN WHEN IT CONTINUE TO COME ON


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Brake pedal is hard but brakes not very effective. booster holds vacuum. replaced booster check valve, no change. dash brake light stays on most of time but sometimes goes out for a while then comes back...


Check the brake fluid first.is it low or no brake fluid at all.is the brake fluid got dried up or leaked out. Sounds like the power brake booster is bad, that is what the master cylinder is bolted too. There is a rubber hose that has a plastic valve in it were it snaps into the booster, Pull that rubber hose out of the booster and off of the engine, Now the end that you took off the engine. You should be able to **** through the line, but not be able to blow through it. If you can then replace the valve, It is a one way valve.
If that is all right then hook hose back up to the engine and start engine, You should hear a major vacuum leak at the valve end, put you finger over the valve and it should stop making noise and engine should smooth out. If it don't the rubber hose must be leaking or the tube on the engine were the hose hooks to is stoped up.
Also check the master cylinder if power booster is replaced. If the brake light is coming and going check the brake light switch. check fig for the internal assembly parts:-- bdea807.gif

To check engine vacuum, connect a vacuum gauge to the supply hose that runs from the intake manifold to the booster. A low reading (below 16 inches) may indicate a hose leak or obstruction, a blockage in the exhaust system (plugged catalytic converter, crushed pipe, bad muffler, etc.), or a problem in the engine itself (manifold vacuum leak, bad valve, head gasket, etc.).
The condition of the diaphragm inside the booster is also important. If cracked, ruptured or leaking, it won't hold vacuum and can't provide much power assist. Leaks in the master cylinder can allow brake fluid to be siphoned into the booster, accelerating the demise of the diaphragm. So if there's brake fluid inside the vacuum hose, it's a good indication the master cylinder is leaking and needs to be rebuilt or replaced. Wetness around the back of the master cylinder would be another clue to this kind of problem.
To check the vacuum booster, pump the brake pedal with the engine off until you've bled off all the vacuum from the unit. Then hold the pedal down and start the engine. You should feel the pedal depress slightly as engine vacuum enters the booster and pulls on the diaphragm. No change? Then check the vacuum hose connection and engine vacuum. If okay, the problem is in the booster and the booster needs to be replaced.
Vacuum boosters also have an external one-way check valve at the hose inlet that closes when the engine is either shut off or stalls. This traps vacuum inside the booster so it can still provide one or two power assisted stops until the engine is restarted. The valve also helps maintain vacuum when intake vacuum is low (when the engine is under load or is running at wide open throttle). You can check the valve by removing it and trying to blow through it from both sides. It should pass air from the rear but not from the front.
Replacing a vacuum booster is a fairly straight forward job. All you have to do is disconnect it from the brake pedal on the inside and unbolt the master cylinder. The pushrod that runs from the booster into the back of the master cylinder must have the specified amount of play.
You will typically find the power brake booster mounted on the firewall attached to the master cylinder. The master cylinder is connected to the brake pedal.
Thanks. keep updated for any more query.you can rate this solution and show your appreciation.

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