Semi Truck Diagnostic & Testing Tools
- 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
- IPA®6-piece Master Fuel Pump Relay Bypass Kit (9038)6-piece Master Fuel Pump Relay Bypass Kit by IPA®. Energize a Fuel Pump with the Push of a Switch! The Fuel Pump Relay Bypass Master Kit combines the most popular fuel pump relay applications. The 6-piece kit allows fuel pressure to be...Actuates fuel pump when the engine is not runningPlugs in place of relay$63.71
- IPA®6-piece Relay Bypass Kit with Amp Loop (9038A)6-piece Relay Bypass Kit with Amp Loop by IPA®. Energizes a Fuel Pump with the Push of a Switch! The Relay Bypass Switch with Amp Loop energizes fuel pumps and any 12V relay by powering a DC motor for testing. It also makes DC motor...Controls relay circuits independent of "key-on/key-off" systemsRun automotive, 12V DC motors with a push of a switch$89.96
- IPA®7-Way Replacement Pin and Jumpers Pack for Trailer Circuit Tester (7865-K)Universal 7-Way Replacement Pin and Jumpers Pack for Trailer Circuit Tester by IPA®. Your electrical system maintenance will be easier with this high-quality product. It is specially developed and manufactured for your electrical system...Designed for your maintenance needsMade from high-grade material for a long lifespan$12.80
- IPA®Fuse Saver™ 10' Extension Cable (8005-EXT)Universal Fuse Saver™ 10' Extension Cable by IPA®. This is a replacement part for the #8005: Fuse Saver® Standard Kit. Your electrical system maintenance will be easier with this high-quality product. It is specially developed and...Designed for your maintenance needsMade from high-grade material for a long lifespan$28.12
- IPA®Fuse Saver™ 5 A Orange Replacement Handle (8005-5A)Universal Fuse Saver™ 5 A Orange Replacement Handle (8005-5A) by IPA®. These Fuse Saver™ handle replacements come in multiple sizes. Your electrical system maintenance will be easier with this high-quality product. It is specially...Designed for your maintenance needsMade from high-grade material for a long lifespan$29.97
- IPA®Fuse Saver™ Electrical System Tester Kit (8016)Universal Fuse Saver™ Electrical System Tester Kit by IPA®. Chase Down Short Circuits Without Blowing Fuses! The Fuse Saver® Master Kit provides a level of versatility in electronics testing (5-30 amps) never before available. It...Helps install radios, CD players, radar detectors and accessories with easeAllows a technician to move around a vehicle shake testing wires while looking for the short$204.71
- Insize®Portable Refractometer (ISQ-RM30)Universal Portable Refractometer by Insize®. Quickly measure the concentration of coolant.Refer to the refraction factor of coolant, for example:the refraction factor of grinding emulsion is 2.1, the reading value is 6%, so the actual...Provides an easy and affordable way of testing your engine’s cooling systemDesigned to assist in checking your antifreeze/coolant to maintain it at the proper concentration$144.53
- Interdynamics®5 oz. R-134a A/C Direct Charge UV Leak Finder (UVD-1)Universal 5 oz. R-134a A/C Direct Charge UV Leak Finder by Interdynamics®. Use To Pinpoint The Smallest Leaks In All R-134a Auto Air Conditioning System. Contains 5 Applications Of UV Dye. With Direct Charge Dispenser. 5 Ounce Aerosol...Aerosol applications of R-134a A/C system UV leak detection dyeCompatible with all PAG and ester oils$15.52
- Interdynamics®A/CPRO™ 8 oz. A/C System UV Fluorescent Leak Detector Dye (383)Universal A/CPRO™ 8 oz. A/C System UV Fluorescent Leak Detector Dye by Interdynamics®. 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...Universal A/C System Fluorescent UV Leak Detector Dye Can be used in all R-134a, R-12 and R-22 systemsCompatible with all PAG, Ester and Mineral based refrigerant oils$23.57
- Interdynamics®A/CPRO™ 8 oz. R-134a PAG Medium Viscosity 100 Refrigerant Oil with UV Dye (P100UV)Universal A/CPRO™ 8 oz. R-134a PAG Medium Viscosity 100 Refrigerant Oil with UV Dye by Interdynamics®. Keep your pride and joy running in tip-top shape with this top-grade automotive product. With it, you can easily and reliably check...Medium Viscosity Oil For R-134a Systems ISO 100 medium viscosityMeets OEM specifications PAG Oil with UV DYE detects leaks with any leak detection system$12.88
- Interdynamics®AutoPRO™ 1 oz. A/C System UV Fluorescent Leak Detector Dye (376CS)Universal AutoPRO™ 1 oz. A/C System UV Fluorescent Leak Detector Dye by Interdynamics®. 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...Enough For 4 ApplicationsNot For Use In Hybrid/Electric Vehicles With Non-Belt Driven (Electric Driven) Compressor$11.38
- Interdynamics®AutoPRO™ 1 oz. Cooling System UV Fluorescent Leak Detector Dye (375CS)Universal AutoPRO™ 1 oz. Cooling System UV Fluorescent Leak Detector Dye by Interdynamics®. 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...Engine Coolant UV DyeOne application of radiator / engine cooling system UV leak detection dye$8.10
- Interdynamics®UV Leak Detection Light Kit with Glasses (438)Universal UV Leak Detection Light Kit with Glasses by Interdynamics®. 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...High-intensity true Ultraviolet leak detection pen light and AAA batteriesWorks with all types of UV leak detection dye$16.11
- King Racing®0 to 140 psi Standard Fuel Pressure Tester (1905)Universal 0 to 140 psi Standard Fuel Pressure Tester by King Racing®. Every tool box needs to have one of these High Speed Checkers. Large 2-1/2" liquid filled gauge ensures exact repeatable readings. The American made parker regulator...All aluminum aircraft hardware#6 female swivel for easy check valve insulation$137.30
- King Racing®Dual Gauge Leak Down Tester (1915)Universal Dual Gauge Leak Down Tester by King Racing®. King Racing Products Dual Gauge Leakdown Tester is a true original. Manufactured from only the best alloys and utilizing American Made Hardware. The Dual Gauge Design repeats each...Made In the USAParker USA Regulator$181.10
- King Racing®Superflow™ 0 to 160 psi Fuel Pressure Tester (1900)Universal Superflow™ 0 to 160 psi Fuel Pressure Tester by King Racing®. Made for today’s high pressure fuel systems. This is the most accurate gauge you will ever find. With the billet aluminum distribution block and the easy flow...Can Easily Be Mounted To Any Wall or BenchAmerican Made Hardware$257.08
- Lang Tools®0 to 10 psi Deluxe Vacuum and Fuel Pump Tester (TU-1PB)Universal 0 to 10 psi Deluxe Vacuum and Fuel Pump Tester by Lang Tools®. Heavy duty tester complete with 2 feet of high quality hose, plus 3 fittings to test all domestic and foreign cars and trucks with gasoline Engine. 3-1/2" compound...Designed for your fuel system maintenanceMade from quality materials to survive the test of time$33.88
- Lang Tools®0 to 100 psi Basic Fuel Pressure Tester Kit (TU-32-2)Universal 0 to 100 psi Basic Fuel Pressure Tester Kit by Lang Tools®. 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...Designed for your fuel system maintenanceMade from quality materials to survive the test of time$245.99
- Lang Tools®0 to 100 psi Master Global Fuel Injection Pressure Tester Set (TU-550)0 to 100 psi Master Global Fuel Injection Pressure Tester Set (TU-550) by Lang Tools®. Covers all major model vehicle platforms, domestic and foreign, 1988 to present (does not include CIS/TBI). Test gauge assembly disconnects from test...Covers all major domestic and foreign platforms 1988 to present (does not include CIS/TBI)Test gauge (includes boot for protection) assembly disconnects from test hose and valve assembly for easier storage and improved gauge protection$463.00
- Lang Tools®0 to 1000 psi Analog Diesel Compression Tester (TU15PB)Universal 0 to 1000 psi Analog Diesel Compression Tester by Lang Tools®. 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...Designed to help to get your job done rightManufactured utilizing the highest quality materials$58.02
- Lang Tools®0 to 15 psi Vacuum and Fuel System Test Kit with 6' Hose and Quick Coupler (TU-32-6)0 to 15 psi Vacuum and Fuel System Test Kit with 6' Hose and Quick Coupler by Lang Tools®. This product is designed and manufactured to help you keep the fuel system of your vehicle in mint condition. It will make fuel system...Designed for your fuel system maintenanceMade from quality materials to survive the test of time$215.03
- Lang Tools®0 to 300 psi Compucheck Fuel System Pressure Test Gauge (TU-32-20)Universal 0 to 300 psi Compucheck Fuel System Pressure Test Gauge by Lang Tools®. 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...Designed to help to get your job done rightManufactured utilizing the highest quality materials$148.42
- Lang Tools®0 to 5000 psi High Pressure Oil System Tester (TU-32-7)0 to 5000 psi High Pressure Oil System Tester (TU-32-7) by Lang Tools®. Used to diagnose the inline pressure, pressure loss to one head, and oil pump. This product is manufactured to help you maintain and service your oil system. It...Manufactured for your oil system maintenanceBuilt to enhance your productivity$972.13
- Lang Tools®1" Injector Diesel Adapter for use with Diesel Compression Tester TU-15 (TU-15-9)1" Injector Diesel Adapter for use with Diesel Compression Tester TU-15 (TU-15-9) by Lang Tools®. This product is made of high-quality materials to serve you for years to come. Designed using state-of-the-art technology and with...Designed to help to get your job done rightManufactured utilizing the highest quality materials$63.46
- Lang Tools®10' 3 Leads Magnetic Retractable Test Leads with Insulated Alligator Clip (1135)Universal 10' 3 Leads Magnetic Retractable Test Leads with Insulated Alligator Clip (1135) by Lang Tools®. Your electrical system maintenance will be easier with this high-quality product. It is specially developed and manufactured for...Retractable test leads pull out and stay at desired length and rewind into its own protective case when not in useDesigned for your maintenance needs$26.51
- Lang Tools®10' 3 Leads Retractable Test Leads with Insulated Alligator Clip (1129)Universal 10' 3 Leads Retractable Test Leads with Insulated Alligator Clip (1129) by Lang Tools®. Your electrical system maintenance will be easier with this high-quality product. It is specially developed and manufactured for your...Retractable test leads pull out and stay at desired length and rewind into its own protective case when not in useDesigned for your maintenance needs$17.21
- Lang Tools®100 psi Dual Gauge Cylinder Leak Down Tester (CLT-2PB)Universal 100 psi Dual Gauge Cylinder Leak Down Tester by Lang Tools®. Measures the ability of an engine cylinder to hold compressed air using shop air pressure; supplements a compression tester. Measures the ability of an engine...Perfect solution for leak detectionJust the way to get the job done quickly and hassle free$99.73
- Lang Tools®13-piece Analog Diesel Compression Test Set (TU-15-55)13-piece Analog Diesel Compression Test Set by Lang Tools®. 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...TU-15 gauge with easy to read red and black dialTester has a handy deflator for releasing air and re-testing$303.56
- Lang Tools®15-piece Analog Diesel Compression Test Set (TU-15-70)15-piece Analog Diesel Compression Test Set by Lang Tools®. 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, this product will last a...Tester has a handy deflator for releasing air and re-testingA 16-1/2" wire reinforced hydraulic hose has a Quick Coupler on a swivel for ease of connection$505.38
- Lang Tools®30' 2 Leads Magnetic Retractable Test Leads with Insulated Alligator Clip (1138)Universal 30' 2 Leads Magnetic Retractable Test Leads with Insulated Alligator Clip (1138) by Lang Tools®. Your electrical system maintenance will be easier with this high-quality product. It is specially developed and manufactured for...Retractable test leads pull out and stay at desired length and rewind into its own protective case when not in useDesigned for your maintenance needs$37.80
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.