If your license plate light not working after bulb change , there are several potential causes to consider. Firstly, ensure that the new bulb is compatible with your vehicle's make and model. Double-check that it is correctly installed and securely connected. If the bulb appears to be functioning properly, check the fuse related to the license plate light circuit. A blown fuse can result in the light not working. Additionally, inspect the wiring and connectors for any damage or loose connections. Corroded or damaged wiring may impede the flow of electricity. If troubleshooting these common issues does not resolve the problem, it is advisable to consult a professional mechanic or an automotive specialist who can diagnose and repair the electrical issue accurately. Remember, proper illumination of your license plate is essential for legal compliance and safety on the road.