Lisle Semi-Truck Diagnostic & Testing Tools

Universal Power and Ground Outlet by Lisle®. Provides a Convenient Electrical Ground and Power Source from the Vehicle. Plug the tool into the cigarette lighter or power accessory receptacle. You now have a ground and power source on...

Relay Jumper Circuit Tester Kit by Lisle®. Set of Four Relay Test Jumpers Make Testing Relays or Live Circuits Quick and Easy. Set includes four jumpers to fit the most popular size relays on domestic and import vehicles. Simply remove...

Universal Replacement Bulb for 20610 Inline Spark Tester by Lisle®. If you're looking for a reliable solution to complete your project, this 1st-grade product is right up your alley. Designed utilizing the finest materials, it delivers...

Spark Tester by Lisle®. Tests Spark Plugs, Spark Plug Wires and Coils Without Puncturing the Wire. With the engine running, place the grooved end of the tool over the plug wire. The bulb will flash to indicate spark.

Universal 12 V/24 V Relay Tester by Lisle®. A Straightforward Relay Tester That Will Easily And Quickly Test Most 12 And 24 Volt DC Automotive Relays. Tests relays by simply clipping the test leads onto the relay terminal pins using a...