WirthCo 21049 Circuit & Spark Plug Tester for 12-24V Systems

The WirthCo 21049 Circuit & Spark Plug Tester is a versatile diagnostic tool designed to quickly identify electrical problems in 12-24 volt automotive, marine, and powersports systems. This dual-purpose tester helps technicians and DIY enthusiasts troubleshoot both wiring issues and ignition system problems with ease.

Key Features:

• Tests both circuit continuity and spark plug operation in one tool
• Compatible with 12-volt and 24-volt electrical systems
• Instantly locates wiring problems including bad connections, faulty wires, and damaged sockets
• Visual indicator light confirms battery condition and circuit integrity
• No light indicates short circuit or poor connection for quick fault diagnosis
• Durable construction for shop and field use
• Simple operation requires no additional power source

This essential diagnostic tool saves time during electrical troubleshooting by providing immediate visual feedback on circuit status. The built-in light illuminates when circuits are functioning properly, making it easy to trace electrical problems from the battery through the entire system.