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Wheels are locked, cause

Wheels are locked, cause

Hello website visitors. I want to share with you a little car trick that can grow into big trouble.
My rear brake lights have stopped burning. After dismantling the bulbs, the right one was burned out, the left worker. The fuse turned out to be whole. Then the suspicion fell on the "frog", he is also a limit switch. Having removed the chip from the trailer (installed at the top of the brake pedal bracket), I closed the contacts and the stop caught fire. Then I took off the trailer, cleaned the contacts, and when checking everything worked. Set it in its place. I went to the store.

After driving a little, I noticed that the car was slowing down. With each stop, the brakes wedged harder. In the end, I stopped and the wheels locked completely.

Tormented for some time, by typing, I still got to the bottom of the reason. And the reason is the trailer. Apparently he is somehow connected with the brain. When it worked incorrectly, the brains sent a signal and, probably, the ABS worked (or maybe I'm wrong). In any case, after dismantling the sensor, the brakes were released.
While there is an opportunity, I’ll supplement it.
Yesterday I was not at home and did not understand further. Today I’m going home, the sensor has been dismantled, but it’s connected to the chip (it hangs on the wires). There are no stops, of course. I understand that the car is going stupidly, there are no speakers. I stop, remove the chip from the sensor. Food, everything is fine. When the sensor is dismantled but not disconnected, the computer sees that I start to slow down and gives a command to the engine "stop". Like this.
Now for the sensor. Sensor disassembled. There is nothing sophisticated there. Two terminals with contacts and a spring with a rod. The pedal squeezed, the spring pushed the rod, the contacts closed. They were burnt. After assembly and installation, the brake began to wedge again.
Now look at the photo above. There are thread type notches on the sensor body. In the pedal bracket, socket. So, when I installed the sensor in place, I pressed it with force and turned (stopped). And thus I was pressing the brake pedal.
It was necessary to insert the sensor into the socket, press in, and, as soon as the rod drowned in the body, stop.
I just don’t understand why, with the pedal depressed, each time the brake is pressed, it wedged harder and harder.

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9 comments
Guest Dmitry
With incorrect adjustment, the valve in the vacuum amplifier closes, and the VU membrane itself presses the GTZ stem, blocking the wheels. Faced this trouble on the VAZ 21043, Mitsubishi L300 without ABS, Qashqai, and there was something else, I don’t remember what
Guest Sergey
When the pedal is tightened, the cuffs in the GTZ block the compensation holes through which the liquid returns back to the tank. As a result, the pressure in the line remains, hence the braking. A similar effect with improper rod adjustment between the vacuum booster and the GTZ
Author
Learn materiel students !!
-Thank you already learned-))))
Guest Igor
Find the manual for your car (judging by the photo of the Nissan sensor?) And according to the description make a replacement with precise adjustment of the position of the brake light switch !!!! “Nissan” has such a function “Brake Assistant”, if the switch is not installed correctly or if the car is not working properly, it will brake itself, until it is completely blocked !!! And after a short stop, it is released until the next time you press the brake pedal !!! Learn materiel students !!
Author
I agree. But I figured it out the next day. But with the brains, the pedal is still connected.
Guest Vladimir
Everything is very simple. You pressed the pedal with the sensor and blocked the return hole in the brake cylinder. And the fluid did not return to the tank. Each time you press it, the fluid was only added to the system.
maybe something like "engine braking" ...) but did not come across such machines, I’m going out of the current on jigs and UAZs, right pasan boss
Author
So I thought not connected. But I wrote, took off the frog, the wheels unlocked. The next day I was driving along the highway, without stops, with a frog hanging on the wires (the position of the contacts is closed). And everything would be fine, but the overclocking characteristics have changed. You press on the gas, but it is stupid. He stopped and pulled the frog from the connector. Then she went as needed. It turns out when you press the brake pedal (or when the circuit is closed), the computer begins to "dull" the operation of the engine.
Some nonsense shok
The hydraulic brakes are not connected with electricity in any way. If the car is with cruise control, then in the "frog" should be a second pair of contacts (normally closed). ABS has nothing to do with this switch. ABS uses wheel speed sensors for its work. When braking and a difference in rotation speed occurs (wheel lock), ABS closes the brake fluid valve on the locked wheel until the rotation speed is equalized. The system stops automatically.
The only reason the situation described by the author is the failure to return the brake pedal to its original position. Either the rug prevented this, or dangling parts.

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