- Electrical System Malfunction:
- A common cause behind simultaneously lit brake and battery lights in older vehicles is a problem within the electrical system. Malfunctioning alternators, loose electrical connections, faulty wiring, or a failing battery can cause these warning lights to come on together.
- Faulty Brake Switch:
- Problems with the brake light switch are known to trigger these warning lights in certain Toyota models.
- Low Brake Fluid Level:
- Inadequate brake fluid can activate both the brake and battery lights, especially if a leak in the brake fluid system or worn brake pads results in low fluid levels.
*Important Note:* If both the brake and battery lights come on while driving, it's crucial to pull over safely and address the situation promptly. Driving with these lights illuminated may lead to further problems or safety hazards and should not be continued until the problems have been correctly diagnosed and fixed.
