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If these lights are on even when the vehicle is running, then I would check your battery state of charge. Most parts stores can do this for free, and also check to make sure your brake fluid isn't low. Low brake fluid in the master cylinder reservoir will cause the brake light to come on because there is a fluid level sensor in the reservoir. If the fluid is low, it could mean that you either need brakes, and/or you could have a brake fluid leak. I hope this info helps!
check teh switch, located under the dash, and is touched by the brake lever, also, back brake adjustment and emergency brake cable adjustment (in that order) can cause the parking break lever to not fully return and activate the switch.
Also, Ford uses this light to indicate low brake fluid level. There is a switch on or near the fluid reservoir.
Under your hood, should say either DOT3 or DOT4 brake fluid on the cap. It just unscrews, or pulls off. Use the brake fluid it recommends on the cap. There will be a lower and upper limit, so keep the fluid between the lines.
Note, ....if your brake pads are getting low on wear, your brake fluid will also be low, so you might want to get the brakes checked. The fluid level will come back up when all brakes are new, if you have no leaks.
Often this is because the brake fluid level is low. There is a sensor in the brake fluid reservoir that turns on the dash warning light when it does not sense enough fluid. You can visually check the brake fluid reservoir by looking at the reservoir under the hood. There are marks on the reservoir to show the correct level. If the fluid is low, this means that one of your brake system components is leaking fluid and needs to be replaced or repaired. If the fluid level is ok, possibly there could be air bubbles in the system, and it needs to be bled. If bleeding does not solve the problem, it could mean that the master cylinder is not holding pressure. If the brake pedal is spongy but it becomes firm after a few pumps, usually this means air in the system. If it stays spongy after pumping, and sinks continually when you press it, probably the master cylinder needs to be checked.
hi from the uk this warning light has two functions 1st it comes on when park brake is on then goes off as p/brake released the other function of this light being on ? is a warning that the brake fluid level in the reservoir is low the sensor is on the fill cap however! low level may be a fliud leak ? orsimply the level has dropped over time due to as the brake pads and rear shoes wear down then the fluid displaces from reservoir and compesates for the wear and fluid keeps the w/cylinders always topped up automatically may i suggest you check your b/pads and shoes are not too low for safety if so then renew asap also make sure there is no sign of fluid leaking on brakes especially the rear cyl's and actual b/pipes hope this helps?
The emergency brake light is also the low brake fluid warning light. Check the level in the reservoir. As the brake pads wear the fluid will drop, so if the brake fluid is low, check the pads to make sure the lining material is thick enough. If you have drums in the rear, check the wheel cylinders to make sure they aren't leaking. If everything checks out ok just add a little fluid to the reservoir and that should take care of the light.