1. Faulty light switch: The light switch may be faulty, causing the dash lights to go out when the headlamps or brakes are turned on. Check the light switch for any signs of damage or wear, and replace it if necessary.
2. Faulty wiring: The wiring to the dash lights may be loose or damaged, causing them to go out when the headlamps or brakes are turned on. Check the wiring for any signs of damage or wear, and repair or replace it if necessary.
3. Faulty gauges: The gauges themselves may be faulty, causing them to display incorrect readings when the headlamps or brakes are turned on. Check the gauges for any signs of damage or wear, and replace them if necessary.
4. Faulty ground connection: The ground connection for the dash lights or gauges may be loose or damaged, causing them to malfunction. Check the ground connection for any signs of damage or wear, and clean or repair it if necessary.
If you are uncomfortable troubleshooting and repairing electrical issues, it is recommended to take your vehicle to a qualified mechanic for diagnosis and repair.
