Why my signal light turns off when I turn my headlights on?

If your signal light turns off when you turn on your headlights, it could be due to a wiring issue or a faulty relay. Some vehicles have a shared circuit for the signal lights and headlights, which can cause interference. Additionally, a blown bulb or a bad ground connection may also lead to this problem. It's advisable to check the vehicle's electrical system or consult a mechanic for a thorough diagnosis.