Hallo,
I have an Olds Delmont 88 of the year 1968.
A few days ago the dashlight lamp of breakssystem began to shine.
what can it mean? Do I need a new break pressure Regulator or the sensor?
best regards

 

It means your parking brake or distribution block valve switch is activated.

 

Are your brakes functioning properly? If there's a hydraulic fluid leak, brake pedal will be low and brake performance will be reduced.

First- make sure the parking brake is fully released.

Second- check for leaks in the brake hydraulic system. Master brake cylinder underhood, individual hydraulic cylinders at each wheel, and all steel brake lines in between.

Get it checked. This can be a dangerous condition if a 4500 lb car loses its brakes.

 

From the beginning. The BRAKE light will come on for one of three reasons: when your emergency brake is on, when the differential pressure switch in the brake hydraulic system detects a difference in the line pressures between the front and back brakes, or if the wire from the brake switch to the light is inadvertently shorted to ground. A pressure difference is usually indicative of a leak, which means your brakes are not long for this world. Ensure the emergency brake pedal is fully released, including pulling up on the pedal while pulling out on the release handle. If the light goes out then, that's a simple adjustment. If not, then you either have a wiring short or a real brake problem that needs to be corrected.

 

Hello,
we have no brakefluid going out.
And the Brake is working like bevor.
is it possible that the sensor of the Brake pressure Regulator is broken?
best regards and thanks for your answers.

 

Let's start again. Is this a car with four wheel drum brakes or factory front disc brakes? The factory distribution block looks like this.




As you can see, there are few internal parts. A leak or other cause of low pressure in one side of the system will push that piston one way or the other. If the piston is not reset, it will cause the light to stay on and it can prevent flow in that side of the system. Troubleshooting this problem requires you to start at the master cylinder. Loosen the brake line fittings and see if fluid comes out. If not, fix that. If fluid does come out, reconnect and continue to each subsequent connector in the line until you find where the fluid stops. Fix that.

 

I prefer to start at the wheel cylinders and work back towards the master cylinder. Normally what causes this problem is leaking wheel cylinders or a hose.

 

The OP says that he's not getting fluid.

Start at the source of the fluid (the M/C). If you weren't getting voltage, you wouldn't start at the ground.

 

He's not getting fluid because the shuttle valve slid over if the parking brake light switch is not activated. The cause of that needs to be addressed.

 

Highly likely, but if no fluid is flowing, you aren't going to find a leak by starting at a wheel cylinder. It's also possible that crud in the distro block is causing the piston to stick (which has been a more common problem for me).

 

Yup, I have one right now with normal braking with the piston stuck and the light on. Who doesn't want to take apart rusty old brake lines?

 

I think his wording has thrown everyone off. I think he's saying, he doesn't have any "leaks." And, "the brakes work like before." Then his next question is up for interpretation.
Jmo.

 

Maybe his parking brake pedal is partially pressed down? If the brakes work as before. Which would turn on the light but probably not cause any issues.

Put your foot under the parking brake and pull up while you pull on the release handle. If it goes up and the light goes off then you are OK. Sometimes the spring doesn't pull it fully up when you release the parking brake.

 

^^^^ What he said.

 

As noted in Post #4.

 

I am from Germany, so my english is not the best.
Jesus, it meins, that there is no Fluid ging out of the System.
now I know that the sensor is broken. Do I need new one.
Thanks for your answers.

 

One more time.

Did you disconnect the brake line at the master cylinder and see if fluid comes out? Start at the BEGINNING and work your way down the system.