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You have a leaky brake line somewhere. You will need to find and repair it. If you don't see any lines that are wet, you may have to pull the rear brake drums to check the wheel cylinders. They can also start to leak but are not as likely as a line. If your truck is a standard it's possible that your hydraulic clutch uses the brake master cylinder as a resevoir so check that line as well. A soft pedal would suggest that isn't the problem but if the fluid was low enough air could get into the lines. Hope this helps.
Sounds like a brake light. Check your brake fluid and fill to the correct level if low then see if it goes out.
The Brake light says "BRAKE" is the Brake System Warning Light: "This
light monitors various brake functions, including brake fluid level and
parking brake application. If the brake light turns on, it may indicate that the
parking brake is applied, that the brake fluid level is low, or that
there is a problem with the anti-lock brake system (if equipped)."
Another is the Anti-Lock Brake System Light: "This light monitors the
Anti-Lock Brake System. The light will turn on when the ignition switch
is turned to the ON position and may stay on for as long as four
seconds. If the ABS light remains on or turns on while driving, it
indicates that the Anti-Lock portion of the brake system is not
functioning and that service is required. However, the conventional
brake system will continue to operate normally if the BRAKE warning
light is not on."
It could also be the Tire Pressure Monitoring light. Check the brake fluid first and see if that fixes it.
The brake light is actuated by the float in the brake fluid resevoir. When the sensor travels down the light comes on. When the sensor travels or floats in the fluid the light goes off. Check to see that the brake fluid level is at the full line on the resevoir under thje hood. Most cars of this model use standard dot 3 fluid. Another thing that will turn on the brake light is if the parking brake is applied. Check to see if the park brake is locked in its fully released setting. Sometimes you have to pull the park brake pedal up as you pull the release lever to ensure it is up all the way. riding around with the park brake engaged will burn the rear brake shoes up in a very short time.
the red brake light tells you you are low on fluid or that your parking brake is engaged....the abs light tells you your anti lock braking system is malfunctioning. get the car up to 40mph and SLAM on the brake pedal. the pedal should pulsate and the wheels should as well. if the wheels lock up and you slide to a stop, your antilockbrake system is malfunctioning and you should have a certified mechanic check it out......tires plus and midas both do free brake inspections.......
CHECK ALTERNATOR OUTPUT IT SHOULD BE 13.5 TO 14.5 VOLTS WITH ENGINE RUNNING.IF VOLTAGE LOWER 12 VOLTS THAT WILL CAUSE BRAKE AND ANTI LOCK BRAKE LIGHTS TO COME ON BECAUSE THAT NOT ENOUGH POWER FOR ABS BRAKES OPERATION.IF ALTERNATOR GOOD.BRAKE AND ABS LIGHTS ON ALSO MEANS LOW BRAKE FLUID LEVEL CHECK BRAKE FLUID LEVEL.ALSO. YOU HAVING BRAKE FAILURE.YOU NEED TO HAVE GARAGE OR DEALERSHIP CHECK BRAKES SYSTEM.BEFORE BRAKES COMPLETELY FAIL.
Do you have a separate parking brake light and a "regular" brake light? Most vehicles only have one light, it illuminates when the parking brake is set, but it also illuminates when the system detects a failure anywhere in the brake system.
You could have a separate light for the anti-lock brake system (ABS ).
Your description of a light that is on till you apply the brakes is usually a sign of some sort of system brake failure. Start with brake fluid level, then inspect the brakes at each wheel, looking for a leak.
If nothing detected there, then you likely have something more serious. (Master brake cyclinder bad, possible something in the ABS brakes, etc.)
Others may disagree, but I would suggest not driving the vehicle (except to a mechanic) until this is corrected.