1. Safety First!
* Park on a level surface, engage the parking brake, and turn off the engine.
* Wear safety glasses.
2. Identify the Faulty Light(s):
* Ask someone to press the brake pedal while you check all brake lights (left, right, and high-mounted stop lamp, if equipped). Note which light(s) are not working.
3. Troubleshooting:
* Bulb Failure: This is the most common cause.
* Access the bulb: This varies depending on the model year and light location. Consult your owner's manual for specific instructions. Generally, you'll need to access the light fixture from inside the boot (trunk) or under the rear bumper. This often involves removing trim panels or screws.
* Remove the bulb: Carefully twist and pull out the old bulb.
* Inspect the bulb: Check for a broken filament.
* Replace the bulb: Use a bulb of the correct wattage and type (check your owner's manual). Ensure it's firmly seated.
* Reassemble everything: Put back the trim panels and screws.
* Fuse Blown: A blown fuse can prevent power reaching the lights.
* Locate the fuse box: Your owner's manual will show the location (usually in the engine bay or passenger compartment).
* Identify the brake light fuse: The manual will also list which fuse controls the brake lights. It's often a higher amperage fuse.
* Check the fuse: Use a fuse tester or visually inspect the fuse for a broken filament. Replace with a fuse of the same amperage if necessary.
* Wiring Problem: Damaged or corroded wiring can interrupt the circuit.
* Inspect the wiring: Carefully examine the wiring harness leading to the brake lights for any visible damage, loose connections, or corrosion. Pay particular attention to where wires may be bent or rubbed against metal.
* Test the wiring: Use a multimeter (if you have one) to test for continuity in the circuit. This requires some electrical knowledge. If you're not comfortable with this, take it to a mechanic.
* Brake Light Switch: This switch, located near the brake pedal, activates the brake lights when the pedal is pressed.
* Locate the switch: Consult your owner's manual for its location.
* Test the switch: This can be done with a multimeter (requires electrical knowledge) or by having someone press the brake pedal while you check for continuity at the switch's wires. If the switch is faulty, it needs to be replaced.
* Brake Light Control Unit (BCM) (Less Likely): In some cases, a malfunctioning BCM can cause brake light issues. This is less likely but requires professional diagnosis and repair.
4. Testing:
After each repair step, have someone press the brake pedal to ensure the brake lights are working correctly.
5. When to Seek Professional Help:
If you're not comfortable working on your car's electrical system or if you've tried the above steps and the brake lights still don't work, take your Peugeot 106 to a qualified mechanic. Faulty brake lights are a safety hazard, and it's best to have them repaired by someone with experience.
Remember to always consult your Peugeot 106's owner's manual for specific details and diagrams related to your vehicle's model year. The location of components and the type of bulbs can vary.
