Question

what should you do if your brakes fail? put these tactics for stopping the vehicle in the correct order, from the first thing you should try to the last resort option. downshift into the lowest available gear. carefully scrubs your wheels against the curb or the side of your vehicle against a guardrail. try to rebuild fluid pressure by pumping the brakes. gradually apply the parking brake.

Explanation:

Step1: Try to rebuild fluid pressure

When brakes fail, first try to rebuild fluid pressure by pumping the brakes. This is a common initial step as it might restore some braking function.
$$\text{Pump brakes for fluid pressure}$$

Step2: Downshift into lowest gear

If pumping brakes doesn't work, downshift into the lowest available gear. Engine braking can help slow the vehicle.
$$\text{Downshift to lowest gear}$$

Step3: Apply parking brake gradually

Next, gradually apply the parking brake. Sudden application can cause skidding.
$$\text{Gradually apply parking brake}$$

Step4: Use curb/guardrail as last resort

As a last resort, carefully scrub wheels against curb or vehicle against guardrail. This should be done only when other methods fail.
$$\text{Use curb/guardrail (last resort)}$$

Answer:

1. Try to rebuild fluid pressure by pumping the brakes.
2. Downshift into the lowest available gear.
3. Gradually apply the parking brake.
4. Carefully scrubs your wheels against the curb or the side of your vehicle against a guardrail.