* Brake System Issues:
* Low brake fluid: This is the most common cause. Check your brake fluid reservoir (usually a clear or translucent container) located under the hood. If it's low, you have a leak somewhere in the system – a serious problem requiring immediate attention. Don't just top it off; find and fix the leak.
* Brake pad wear: Worn brake pads trigger a sensor that illuminates the light. This requires replacement of the pads.
* Brake wear sensor malfunction: The sensor itself might be faulty, even if the pads aren't completely worn.
* Brake line leak: A leak in any part of the brake lines will cause low fluid and activate the light.
* Master cylinder failure: A failing master cylinder is a serious issue that prevents proper brake function.
* Wheel cylinder or caliper issues: Problems with these components can cause uneven braking and activate the light.
* ABS system malfunction: The Anti-lock Braking System (ABS) is a separate system, but its problems can also trigger the brake light.
* Other Potential Causes (Less Common but Possible):
* Brake light bulb is burned out: While a burned-out bulb usually only affects one brake light, a malfunctioning bulb can sometimes trigger the warning light.
* Wiring issues: Damaged or corroded wiring in the brake light circuit can also cause the light to illuminate.
* Parking brake engaged: This seems obvious, but double-check.
* Computer issue: A fault code stored in the truck's computer could be causing the light to illuminate.
What to do:
1. Check the brake fluid level immediately. Low fluid is a critical issue.
2. Inspect your brake pads. If they're severely worn, they need replacement.
3. Check your brake lights. Make sure all three bulbs (left, right, center) are working.
4. Check the parking brake. Make sure it's fully released.
5. Have the system professionally diagnosed. If you're not comfortable inspecting the brake system yourself, take your truck to a mechanic. They can use a diagnostic scanner to read any stored fault codes and identify the problem more precisely. Ignoring a red brake light is extremely dangerous.
Safety First: If your brakes feel spongy, weak, or otherwise abnormal, *do not drive the truck*. Have it towed to a repair shop. Your safety depends on properly functioning brakes.
