1. Brake Light Switch: The brake light switch is responsible for activating the brake lights when the brake pedal is depressed. If the switch is faulty or the wiring is damaged, it can cause the fuse to blow. Check the switch and wiring for any signs of damage or wear.
2. Brake Light Bulbs: A shorted or faulty brake light bulb can also cause the 15A stop fuse to blow. Inspect the brake light bulbs and replace any that are damaged or not working properly.
3. Wiring Short Circuit: A short circuit in the wiring harness that supplies power to the brake lights can also cause the fuse to blow. Check the wiring for any signs of damage or wear, especially around the areas where the wiring passes through grommets or connectors.
4. Brake Light Relay: If your Vauxhall Vivaro has a brake light relay, check it for any signs of damage or malfunction. A faulty relay can cause the fuse to blow.
5. Additional Accessories: If you have installed any additional accessories that are connected to the brake light circuit, such as a trailer wiring harness, check the installation and make sure it is not causing a short circuit.
If you are unable to locate the cause of the blown fuse, it is recommended to have your vehicle inspected by a qualified mechanic or auto electrician. They will be able to diagnose the issue and perform the necessary repairs.
