Teach you step by step how to replace a car headlight bulb. Installation must be carried out with the engine turned off and cool. 1. Unplug the power socket of the light bulb; 2. After unplugging the power interface, remove the waterproof cover from the back of the light bulb; 3. Take out the light bulb; 4. Place the new light bulb into the reflector and align it with the fixed position of the light bulb. , pinch the steel wire circlips on both sides and push in to fix the new light bulb in the reflector; 5. Cover the waterproof cover and plug in the light bulb.