1. Faulty Headlight Switch: The headlight switch is responsible for controlling the flow of electricity to the headlights. If the switch is faulty, it may not be properly engaging the low beam circuit, causing the low beams to not turn on. At the same time, it may be constantly engaging the high beam circuit, causing the high beams to be always on.
2. Wiring Issue: A wiring issue in the headlight circuit can also cause this problem. There may be a broken wire or a loose connection preventing the low beams from operating. Additionally, there could be a short circuit causing the high beam indicator to stay on even when the high beams are not actually engaged.
3. Headlight Relay: Some vehicles use a headlight relay to control the power supply to the headlights. If the relay is faulty, it may not be properly switching on the low beam circuit, leading to the low beams not working. However, the high beam circuit may still be functional, resulting in the high beams being always on.
To troubleshoot this issue, you should start by checking the headlight switch. If it appears damaged or faulty, it may need to be replaced. Next, inspect the wiring in the headlight circuit for any signs of damage or loose connections. If you find any issues with the wiring, repair or replace the affected wires. Finally, check the headlight relay (if equipped) and replace it if necessary.
If you are not comfortable performing these checks and repairs, it is recommended to take your vehicle to a qualified mechanic or auto electrician for diagnosis and repair.
