1. Bulbs: This is the most common cause. Check both brake light bulbs. They may be burned out. Inspect carefully, as a filament might be broken but still appear intact at first glance. Replacing them is the easiest fix.
2. Fuses: The brake lights are usually protected by a fuse. Consult your owner's manual to locate the fuse box and identify the fuse for the brake lights (often labeled "brake," "stop," or similar). Check if it's blown (the wire inside will be broken). Replace with a fuse of the same amperage rating.
3. Brake Light Switch: This switch is activated when you press the brake pedal. A faulty switch won't complete the circuit, preventing the lights from turning on. It's a relatively inexpensive and easy-to-replace part located near the brake pedal. You can test it with a multimeter to see if it's providing continuity when the pedal is pressed.
4. Wiring: Wires can corrode, break, or become disconnected. Inspect the wiring from the brake light switch to the lights themselves, looking for damage or loose connections. Pay particular attention to the connections at the bulbs and the switch. Look for corrosion and ensure the wires are securely connected.
5. Brake Light Switch Adjustment: Sometimes the brake light switch might need slight adjustment. If it's not properly aligned, it might not be making contact when the brake pedal is pressed.
6. Tail Light Assemblies: The problem might not be the brake light bulbs themselves, but a faulty connection within the tail light assemblies. Inspect the sockets inside the tail light for damage or corrosion.
7. (Less likely, but possible):
* Grounding Issue: A poor ground connection somewhere in the circuit can prevent the lights from working. This would be more difficult to trace.
* Central Brake System Issues: In rare instances, a problem within the vehicle's main braking system (master cylinder, etc.) could affect the electrical circuit, though this usually presents with other symptoms.
Troubleshooting Steps:
1. Check the Bulbs: Start here. It's the easiest and most likely cause.
2. Check the Fuse: This is quick and easy.
3. Inspect the Brake Light Switch: Visually inspect it and, if possible, test its continuity with a multimeter.
4. Inspect the Wiring: Look for visible damage or loose connections.
5. Check the Grounding: This is the most challenging step and best left to someone with electrical experience.
If you're not comfortable working with car electrical systems, it's best to take your Camry to a mechanic. They have the tools and expertise to diagnose the problem accurately.
