Semi Truck Diagnostic & Testing Tools
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Code Readers & Scanners
Anti-Freeze & Coolant Testers
Electrical Testers
Timing Lights
Fuel System Testers
Ignition Testers
Brake Testers & Measuring Tools
Coating Thickness Gauges
Oil Pressure Test Tools
Engine Compression Testers
Diagnostic Leak Detection
Headlight Alignment Systems
Suspension Testers
Vehicle Scales
Refrigerant Identifiers
Window Tint Meters
Exhaust System Testers
Auto Inspection Cameras & Scopes
Featured Brands
- Lisle®Combustion Leak Detector Kit (75500)Universal Combustion Leak Detector Kit by Lisle®. Checks for combustion leaks caused by bad head gaskets, cracked blocks, and cracked or warped heads. Fluid changes from blue to yellow when exposed to combustion gases from the radiator....Perfect solution for leak detectionJust the way to get the job done quickly and hassle free$32.16
- Lisle®Deluxe Relay Tester Set (60660)Universal Deluxe Relay Tester Set (60660) by Lisle®. Includes 8 Jumpers to Fit Most Popular Relays. Also Includes Test Lead Kit and Relay Puller Pliers. Jumpers have tabs for clamping and flat pads to place test leads on. No need to...Designed for your maintenance needsMade from high-grade material for a long lifespan$155.82
- Lisle®Gray Relay Jumper (60650)Universal Gray Relay Jumper (60650) by Lisle®. This product is made of high-quality materials to serve you for years to come. Designed using state-of-the-art technology and with customers in mind. It will meet your needs and deliver...Designed to help to get your job done rightManufactured utilizing the highest quality materials$19.27
- Lisle®Green Relay Jumper (56850)Universal Green Relay Jumper (56850) by Lisle®. Jumper to fit the most popular size relays on domestic and import vehicles. Simply remove relay to be tested, insert correct jumper and insert relay into jumper. When using green four pin...Designed for your maintenance needsMade from high-grade material for a long lifespan$19.01
- Lisle®II™ Relay Jumper Circuit Tester Kit (60610)II™ Relay Jumper Circuit Tester Kit by Lisle®. Set makes testing relays or live circuits quick and easy. Set includes four jumpers to fit many popular relays on Honda, Nissan, Toyota, newer Ford and GM mini micro relays as well as...Designed for your maintenance needsMade from high-grade material for a long lifespan$66.56
- Lisle®Ignition Spark Tester (50850)Universal Ignition Spark Tester by Lisle®. A handy tool to check ignition spark without removing the spark plug. The tool is specially calibrated to measure ignition voltage. Works on both standard and electronic ignition systems. Easy...Quickly Checks Spark At Plug Wire.A Handy Tool To Check Ignition Spark Without Removing The Spark PlugThe Tool Is Specially Calibrated To Measure Ignition Voltage$8.11
- Lisle®Inline Spark Tester (20610)Inline Spark Tester (20610) by Lisle®. Quickly diagnose problems with all ignition systems. Connect the tool between the spark plug and the plug wire. The tool is double-ended to offer a straight boot and a 90boot on one tool. With the...Designed to help to get your job done rightManufactured utilizing the highest quality materials$14.68
- Lisle®M14 and M18 Analog Petrol Compression Tester (20250)M14 and M18 Analog Petrol Compression 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 unmatched...Designed to help to get your job done rightManufactured utilizing the highest quality materials$33.92
- Lisle®Master Relay and Fused Circuit Tester Kit (69300)Universal Master Relay and Fused Circuit Tester Kit by Lisle®. Your electrical system maintenance will be easier with this high-quality product. It is specially developed and manufactured for your electrical system maintenance needs,...Kit Makes Testing Relays or Live Circuits Quick and EasyJumpers to fit most popular relays$197.95
- Lisle®Noid Light (27800)Universal Noid Light by Lisle®. Adjustable Probes fit all Electronic Fuel Injection Systems. Clam Shell. Versatile tool tests throttle body injectors, ported fuel injectors and sequential central port injectors. One-person operation....Expertly Crafted using premium-grade materialsUnsurpassed in functionality and reliability$31.50
- Lisle®Orange Relay Jumper (60620)Universal Orange Relay Jumper (60620) by Lisle®. Your electrical system maintenance will be easier with this high-quality product. It is specially developed and manufactured for your electrical system maintenance needs, delivering...Designed for your maintenance needsMade from high-grade material for a long lifespan$19.01
- Lisle®Power and Ground Outlet (32150)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...Designed for your maintenance needsMade from high-grade material for a long lifespan$16.33
- Lisle®Relay Jumper Circuit Tester Kit (56810)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...Designed for your maintenance needsMade from high-grade material for a long lifespan$66.56
- Lisle®Replacement Bulb for 20610 Inline Spark Tester (20680)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...Designed to help to get your job done rightManufactured utilizing the highest quality materials$3.57
- Lisle®Spark Tester (19380)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.Designed to help to get your job done rightManufactured utilizing the highest quality materials$11.21
- Lisle®Valve Core for 20250 Compression Tester (20100)Universal Valve Core for 20250 Compression Tester by Lisle®. This top-grade product is expertly made in compliance with stringent industry standards to offer a fusion of a well-balanced design and high level of craftsmanship....Expertly Crafted using premium-grade materialsUnsurpassed in functionality and reliability$1.60
- Lisle®Valve Holder for Both 14 mm and 18 mm Spark Plug Threads (19700)Valve Holder for Both 14 mm and 18 mm Spark Plug Threads by Lisle®. Commonly used when valve springs or valve stem seals are replaced. Air pressure helps prevent the valve from falling into the combustion chamber. Comes with two-step...Designed to help to get your job done rightManufactured utilizing the highest quality materials$14.48
- Longacre®4" Replacement Screw-In Steel Swivel Feets, 2 Pieces (52-72894)Universal 4" Replacement Screw-In Steel Swivel Feets, 2 Pieces (52-72894) by Longacre®. This top-notch product is designed to help you get in the know of the vehicle’s weight. Made from superior materials, it will provide you with the...Package of 2 replacement swivel feet - screw-in1/2" - 13$49.99
- Mastercool®4 oz. UV Dye Remover (53314)Universal 4 oz. UV Dye Remover by Mastercool®. Keep your pride and joy running in tip-top shape with this top-grade automotive product. With it, you can easily and reliably check your vehicle for leaks to ensure its dependable and...Perfect solution for leak detectionJust the way to get the job done quickly and hassle free$4.85
- Mastercool®Auto Master 1 oz. Leak Shield (53615-A)Universal Auto Master 1 oz. Leak Shield by Mastercool®. Easy to use! Stops leaks in metal and rubber automotive air conditioner parts including evaporators, condensers, o-rings, gaskets and hoses. This product is made of high-quality...For use in R134a, HFO-1234yf, hybrid and electronic A/C systemsIncludes o-ring conditioner, proprietary anti-wear and anti-oxidant additives$51.03
- Mastercool®Combustion Gas Leak Tester Kit (43707)Universal Combustion Gas Leak Tester Kit (43707) by Mastercool®. Fast, economical and accurate method to test for combustion gas leaks from head gasket, cylinder head & engine block. Keep your pride and joy running in tip-top shape with...Dual chamber for improved accuracy and to reduce the risk of coolant contaminating the testWorks on gasoline & diesel engines$72.78
- Mastercool®Combustion Gas Leak Tester Kit with Test Cap Adapter (43710)Universal Combustion Gas Leak Tester Kit with Test Cap Adapter (43710) by Mastercool®. Fast, economical and accurate method to test for combustion gas leaks from head gasket, cylinder head & engine block. Includes expansion tank adapter...Dual chamber for improved accuracy and to reduce the risk of coolant contaminating the testWorks on gasoline & diesel engines$89.51
- Mastercool®Concentrated UV Dye Cartridge (53810)Universal Concentrated UV Dye Cartridge by Mastercool®. 10 Applications. Keep your pride and joy running in tip-top shape with this top-grade automotive product. With it, you can easily and reliably check your vehicle for leaks to...Perfect solution for leak detectionJust the way to get the job done quickly and hassle free$18.99
- Mastercool®Evap Diagnostic Smoke Machine (43060-EV)Universal Evap Diagnostic Smoke Machine by Mastercool®. For all evap, intake, exhaust, vacuum lines and vacuum components, passenger compartment window and sunroof, headlight/tail-light fixtures and much more. This unit provides the...Compact, heavy-duty design for years of reliable serviceMultiple options for smoke injection include built-in internal compressor, shop air and inert gases$670.01
- Mastercool®HD Truck Diagnostic Smoke Machine (43060-HD)Universal HD Truck Diagnostic Smoke Machine by Mastercool®. For all HD truck intakes, exhaust, vacuum lines and components, cabin air and water leaks and much more.. Keep your pride and joy running in tip-top shape with this top-grade...Compact, heavy-duty design for years of reliable serviceOperates on shop air or inert gas$1,079.90
- Mastercool®Intellasense III Combustible Gas Leak Detector (55975)Universal Intellasense III Combustible Gas Leak Detector by Mastercool®. At the heart of this leak detector is a new low power metal oxide gas sensor with superior performance properties such as lower current consumption and sensor...Perfect solution for leak detectionJust the way to get the job done quickly and hassle free$213.31
- Mastercool®Mini UV Flashlight Kit (53513-UV)Universal Mini UV Flashlight Kit by Mastercool®. When dye has been added to the system, easily search for a bright green/yellow glow where the system is leaking with this high intensity LED illumination mini flashlight.High intensity LED bulb - UV illuminationAluminum body with anodized finish$32.41
- Mastercool®Multi Fluid Refractometer (43705)Universal Multi Fluid Refractometer by Mastercool®. Test your engine’s cooling system with this easy-to-use and reliable tester to prevent freeze-ups in cold weather and boil-overs during hot conditions and ward off corrosion to keep...Offers a quick and easy way to test the freezing point of coolant/anti-freezeCompatible with Ethylene or Propylene Glycol$76.12
- Mastercool®Professional Refillable Type UV Leak Detection Kit (53351)Universal Professional Refillable Type UV Leak Detection Kit by Mastercool®. Leading the way in UV leak detection, Mastercool offers a variety of compact UV leak locator kits. Each kit offers a powerful inspection lamp, a "refillable"...Perfect solution for leak detectionJust the way to get the job done quickly and hassle free$93.96
- Mastercool®R-1234yf Refrigerant Visual Inspection Sight Glass (53376-YF)Universal R-1234yf Refrigerant Visual Inspection Sight Glass (53376-YF) by Mastercool®. The condition of the refrigerant in your A/C system is an important factor in the proper operation of all components and overall cooling efficiency....Perfect solution for leak detectionJust the way to get the job done quickly and hassle free$164.96
With today’s high-tech computer and electronics packed vehicles, electronic testers and diagnostic equipment have become the main weapons in the vehicle service arsenal, so we’ve stocked our digital shelves with scan tools, multimeters, analyzers and much more. When you’re armed with these electronic tools, you’ll be able to defeat any CHECK ENGINE light, blown fuse, balky window, recalcitrant alternator, or any other electrical malfunction with ease.
Electronic testers range from simple jumper wires, also called test leads, to sophisticated engine scan tools. Test leads allow you to bypass a circuit and directly test a component by applying 12 volts from the battery. Test lights, also called circuit testers, are essential tools for determining whether voltage is present at particular points in circuits. There are circuit powered and self-powered test lights, also known as continuity testers.
Test lights can tell you whether voltage is present, but they can’t tell you how much. For specific values you need a voltmeter, which is routinely packaged with an ohmmeter and ammeter in an electronic tester called a multimeter. There are analog meters that have a needle and a scale, but Digital Multi-Meters (DMM), also known as Digital Volt Ohm Meters (DVOM) are necessary for computer controlled circuits. Voltmeters can display the amount of voltage, such as when testing a battery or charging system, and test voltage drop. Ohmmeters measure resistance in a circuit and ammeters measure current flow.
A scan tool provides access to your vehicle’s computer control system via a cable connected to the Data Link Connector (DLC). With a scan tool you can read the Diagnostic Trouble Codes (DTCs) that cause CHECK ENGINE, Air Bag, and ABS dash lights to illuminate. Tool capability varies, and some can also read, record, and playback sensor data, display I/M monitor status, read and display freeze frame data, download to a PC, and be updated via USB port. In addition to erasing DTCs, some scan tools can also be used to reset oil lights and other warning lights.
Along with the above mentioned essentials, we also have many more diagnostic time savers including noid lights to check fuel injectors, current probes to measure current without disturbing the circuit, battery testers, infrared thermometers for instantaneous temperature indication, inspection cameras for peaks into the smallest places, and much more. And if you have an older, pre-computer controlled vehicle we have the tools you need to make adjustments and keep your vehicle running right, like timing lights to check initial timing and timing advance, and dwell/tachs to set breaker points and idle speed.