Tail light repair and inspection can be done in easy ways. The light emitted can show its condition. The taillights system must be thoroughly checked to determine the defect. Some bulbs can be easily removed by simply pulling it out. Other types need rotation of the bulb socket in a counterclockwise movement while some types have sockets and notches which need screwdrivers and other car tools. Cracks and burns are the common taillight defects. A broken light filament is a sign that there is a need for a new bulb. Moisture is one of the causes of burned halogen auto tail lights. The trapped water vapor inside the light can cause it to explode or even burn out. Thus there is also a need to check the seals in the tail light areas.
Don't forget to check the electrical connections that join the bulbs. For better connection, the spring connections on the bulb base can be moved towards the bulb base to generate more pre-load against the bulb. To have brighter auto tail lights, change the stock single-filament tail light bulbs with other bulb high powered types. Smaller types can protect plastic lenses from added heat.