1. Double-check the bulbs: Make sure that the new bulbs you installed are the correct type and wattage for your vehicle's license plate lights.
- Remove the bulbs and inspect the filaments. If the filament is broken, replace the bulb.
2. Check the bulb sockets: Ensure the bulb sockets are clean and free of corrosion. Clean the sockets with a wire brush or electrical contact cleaner if necessary.
3. Inspect the wiring: Look for any loose connections or damaged wiring around the license plate lights. Check for any exposed wires or frayed insulation.
4. Test the switch: If your vehicle has a separate switch for the license plate lights, press and release it a few times to ensure proper contact. If the switch is faulty, replace it.
5. Check the ground connection: Make sure the ground connection for the license plate lights is secure and free of corrosion. Clean the ground connection point if needed.
6. Check the license plate assembly: Ensure that the license plate is securely mounted on the vehicle. If the license plate is loose or vibrates, it can cause the bulbs to come loose and create intermittent lighting.
7. Check the BCM: Some modern vehicles have a Body Control Module (BCM) that controls the lighting functions. Check the owner's manual or service manual for the location of the BCM, and make sure there are no loose connections.
If you've gone through these steps and the problem persists, it's best to take your vehicle to a qualified auto electrician for further diagnosis and repair.
