20610 In-line spark tester tool

Troubleshooting an ignition problem is much faster when you can see exactly what is happening. This Lisle in-line spark tester provides a quick visual check to confirm if your ignition system is delivering a spark to the plug. It is a universal tool that works with all ignition systems, making it a staple for any Harley owner's diagnostic kit. Simply connect it in-line and look for the flash. If you ever need a replacement bulb, you can find it under part number 530725. It is a simple, effective way to rule out coil or wire issues without the guesswork, helping you get your bike back on the road sooner.