Key benefits Fast, reliable electrical checks: instantly determine whether a circuit is intact so you can diagnose lighting and fuse problems without guesswork. Saves time and money: helps you pinpoint the fault (bulb, socket, or fuse) so you avoid unnecessary parts purchases or extended shop visits. Safe and durable: long-life light tube generates no heat during testing, reducing risk of burns and extending the tool’s useful life. Portable and ready to use: compact size and attachment make it easy to carry in a glove box or toolbox for roadside or shop use. What it does Tests fuses, light sockets, and other vehicle lights (including brake and backup lights) by indicating continuity with a visible lamp. Provides a clear, immediate indicator: the light illuminates when the circuit is complete, making it simple to identify functioning circuits and locate faults. Who it’s for Automotive technicians and DIYers who need a quick diagnostic tool for vehicle lighting systems. Fleet and maintenance crews who require a compact tester for routine inspections and on-the-go troubleshooting. Key attributes Function: continuity testing for fuses, sockets, and vehicle lights. Compatibility: works with standard automotive fuses and light sockets including brake and backup lights. Size and portability: compact design with an attachment for convenient storage and carrying. Performance and safety: instant visual indication when a circuit is intact; long-life, low-heat light tube for safe continuous use. Practical use scenarios Roadside check: confirm whether a brake light is a burned bulb or a wiring/fuse issue before replacing parts or driving to a repair shop. Pre-purchase or maintenance inspection: verify fuses and light sockets during routine service to catch intermittent faults early. Garage troubleshooting: quickly test backup light circuits after replacing bulbs or connectors to verify repairs. How it helps you Reduces diagnostic time with an easy-to-read visual indication. Minimizes unnecessary parts replacement by identifying the true source of light failures. Offers a compact, safe tool you can take anywhere for dependable lighting system checks.