why does my Volvo XC90 brake light keep coming on

Solution

1. Preparation

• Gather tools and parts required for the repair.
• Ensure the vehicle is parked on a level surface and the engine is off.
• Wear safety gloves and goggles for protection.

2. Check and Refill Brake Fluid

• Locate the brake fluid reservoir under the hood.
• Remove the cap and check the fluid level; it should be between the "MIN" and "MAX" marks.
• If low, use the manufacturer-recommended brake fluid to refill to the appropriate level.
• Replace the cap securely.

3. Inspect Brake Components

• Lift the vehicle using a jack and secure it with jack stands.
• Remove the wheel to access the brake assembly.
• Inspect brake pads for thickness; replace if worn below the manufacturer's specification (typically 3mm).
• Check the brake rotors for scoring or damage; replace if necessary.

4. Test and Replace Brake Light Switch

• Locate the brake light switch, usually mounted near the brake pedal.
• Disconnect the electrical connector and use a multimeter to test the switch function.
• If faulty, replace the brake light switch with a new one and reconnect the wiring.

5. Look for Brake Line Leaks

• Inspect all brake lines and hoses for signs of fluid leaks or damage.
• If leaks are found, replace the affected brake line or hose.
• Bleed the brake system to remove any air introduced during repairs.