* Parking Brake Engaged: The most obvious reason. Make absolutely sure the parking brake is fully released. Sometimes a slight engagement can be enough to trigger the light.
* Parking Brake Switch: This switch is usually located near the parking brake lever. It can become worn, damaged, or misadjusted, sending a false signal to the light even when the brake is released. This is a very common cause.
* Low Brake Fluid: The brake fluid level sensor is often linked to the brake warning light circuit. If the fluid level is low, it can trigger the light (sometimes this light is shared and shows both brake fluid and parking brake status). Check the fluid level in your brake master cylinder reservoir.
* Brake Master Cylinder: A failing master cylinder can leak internally, leading to low brake fluid and activating the warning light.
* Wiring Issues: A short circuit or damaged wiring in the brake light circuit can cause the light to stay on. This is less common but possible.
* Brake Light Switch: While less likely to directly affect the *emergency* brake light, a faulty brake light switch can sometimes interfere with the entire brake warning light system.
Troubleshooting Steps:
1. Check the Parking Brake: This is the first and easiest step. Release the parking brake completely and try again.
2. Check Brake Fluid Level: Inspect the brake fluid reservoir. Low fluid indicates a serious problem that needs immediate attention.
3. Inspect the Parking Brake Switch: Locate this switch (usually near the parking brake lever). Visually inspect for damage. Sometimes, it just needs a slight adjustment. You might need a repair manual to locate the switch precisely and understand its operation.
4. Test the Brake Lights: Ensure all your brake lights are working correctly. If they aren't, it might point towards a broader electrical issue.
If you've checked these and the light remains on, it's best to take your van to a qualified mechanic. Driving with a constantly illuminated emergency brake light can be problematic, both for your safety and because it might indicate a more serious underlying brake system issue. Ignoring it could lead to brake failure.
