* Brake Light Switch: This is the most common culprit. Located near the brake pedal, it's a simple switch that closes when you press the brake pedal, completing the circuit to the brake lights. It can wear out, become misadjusted, or simply fail. This is the first thing to check.
* Fuses: Check the fuse box (usually under the hood and/or inside the cabin) for blown fuses related to the brake lights. Consult your owner's manual to locate the correct fuses.
* Wiring: A break or short in the wiring harness running from the brake light switch to the lights themselves can interrupt the circuit. This is harder to diagnose and often requires tracing the wires. Look for damage near the brake pedal, along the frame, and near the taillights. Corrosion can also be a significant issue.
* Brake Light Bulbs: While you say *all other* lights work, make absolutely sure the brake light bulbs themselves aren't burnt out. Sometimes a filament might break in a way that doesn't affect the other light functions in the same bulb (turn signal, running light).
* Brake Light Circuit Board (Integrated Taillights): If your Durango has integrated taillights (meaning turn signals, running lights, and brake lights are all in one unit), there might be a problem with the internal circuit board within the taillight assembly itself.
* Ground Connection: A poor ground connection somewhere in the circuit can prevent the lights from working. This is less common but possible.
Troubleshooting Steps:
1. Check the Brake Light Switch: This is the easiest and most likely solution. You might need to press on the brake pedal firmly and check for continuity with a multimeter if you have one. Many auto parts stores can test the switch for you for free.
2. Inspect the Bulbs: Visually inspect the brake light bulbs for any signs of breakage. Try swapping them with other bulbs (like the taillights if they’re similar) to eliminate the bulbs as the cause.
3. Check the Fuses: Consult your owner's manual to find the fuse(s) for the brake lights and check if they're blown.
4. Inspect the Wiring: This is the most difficult step, requiring careful visual inspection of the wiring harness for any visible damage.
If you're not comfortable working with car electrical systems, take your Durango to a qualified mechanic for diagnosis and repair. The problem may be simple, but if you’re not confident, professional help is always advisable.
