The Buick Riviera's fuse box is likely to have more than one fuse box. You need to find the second fuse box, usually located under the hood, in the engine compartment. Check the owner's manual (if you have it) for the exact location and a fuse diagram. This under-hood box often contains fuses for higher-power circuits, including lighting.
Look for fuses related to:
* Brake lights: The fuse may be labelled simply "Brake Lights," "Stop Lamps," or something similar.
* Hazard lights: This will probably have its own fuse labeled "Hazard," "Flashers," or "Emergency Flashers."
* Tail lights: A blown tail light fuse could also affect brake lights as they share circuits. Look for fuses labeled "Tail Lights" or similar.
* Parking Lights A blown fuse for this circuit could also affect brake light functionality.
Beyond fuses:
If you've checked all fuses and they're fine, the problem likely lies elsewhere:
* Wiring: A broken or corroded wire somewhere in the system is a strong possibility, especially given both brake and hazard lights are out. This requires tracing the wiring harness, which is a more involved process.
* Brake light switch: This switch, located near the brake pedal, can fail. It sends the signal to activate the brake lights.
* Hazard light switch: This switch can also fail, preventing the hazard lights from working.
* Multi-Function Switch (MFS): This is a common culprit on many cars. It’s the stalk that operates your turn signals, wipers, and sometimes cruise control. A faulty MFS could impact both brake and hazard lights.
* Ground issues: A poor ground connection can prevent the lights from receiving power, or properly completing the circuit. Poor ground connections are often due to corrosion.
Recommendation:
Start with the under-hood fuse box. If the fuses are good there, it's time to consult a repair manual specific to your 1997 Buick Riviera or take it to a qualified mechanic to diagnose the problem. Trying to troubleshoot electrical issues without a proper wiring diagram can lead to further damage.
