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
- OEM Tools®Analog Master Petrol Compression Test Set (27266)Universal Analog Master Petrol Compression Test Set by OEM Tools®. The OEMTOOLS Master Compression Test Kit tests compression on all domestic and foreign cars, light trucks, and small gasoline engines. This is one of the highest quality...Designed to help to get your job done rightManufactured utilizing the highest quality materials$117.29
- OEM Tools®Combustion Leak Detector (27145)Universal Combustion Leak Detector by OEM Tools®. The OEMTOOLS 27145 Combustion Leak Detector offers a quick and efficient way to test for combustion leaks that result from head gasket, cylinder head and engine block leaks. This...Test for Internal Combustion Leaks on Gasoline EnginesFluid Color Changes to Yellow When a Combustion Leak is Present$30.14
- OEM Tools®Relay Circuit Tester (27211)Relay Circuit Tester by OEM Tools®. The new OEM Relay Circuit Tester is not simply a tool to test a relay. It is a tool that can test an entire circuit from the battery to the component in question. Through its function it will also...Cut Relay Related Diagnosis Time by 75%Identify at the Push of a Button if a Wire, a Part, or a Relay is Defective an Entire Circuit from the Battery to the Component$167.13
- OTC®0 to 10 psi Diesel Fuel Pressure Gauge (6754)0 to 10 psi Diesel Fuel Pressure Gauge by OTC®. This product is designed and manufactured to help you keep the fuel system of your vehicle in mint condition. It will make fuel system maintenance easier and more convenient, saving your...Designed for your fuel system maintenanceMade from quality materials to survive the test of time$404.13
- OTC®0 to 100 psi Basic Fuel Injection Diagnostic Kit (7635A)0 to 100 psi Basic Fuel Injection Diagnostic Kit (7635A) by OTC®. Fuel Injection Diagnostic Set With these sets, you can quickly and accurately diagnose fuel pressure problems on engines that have multi-port fuel injection systems. You...Designed to help to get your job done rightManufactured utilizing the highest quality materials$160.17
- OTC®0 to 100 psi Fuel Pressure Tester Kit (FIX7818)0 to 100 psi Fuel Pressure Tester Kit (FIX7818) by OTC®. Safely test car and truck fuel pressure systems equipped with a Schrader or fuel access valve test port on the fuel line. The Fuel Pressure Tester Kit works on most domestic fuel...Large, easy-to-read scaleSolid brass fittings$54.02
- OTC®0 to 100 psi Pressure Hose (211398)0 to 100 psi Pressure Hose (211398) by OTC®. 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 great...Designed to help to get your job done rightManufactured utilizing the highest quality materials$32.93
- OTC®0 to 1150 psi Analog Compression Gauge (Similar to J-6692-B) (5872)0 to 1150 psi Analog Compression Gauge (Similar to J-6692-B) by OTC®. Designed to measure compression within heavy duty engines. Similar to J-6692-B. This product is made of high-quality materials to serve you for years to come....Hose has push button release valve, and hose end has a quick coupler for connection to compression adaptersDesigned to measure compression within heavy duty engines$227.53
- OTC®0 to 400 psi Pressure Gauge (0031-0462)Universal 0 to 400 psi Pressure Gauge (0031-0462) by OTC®. lass1 Interlube filled pressure gauges with patented Sub-Z II freeze-proof isolator are a must for all fire apparatus. Because the stem and bourdon tube are filled and sealed...White dial with black markingsChrome plated bezel$32.93
- OTC®0 to 5000 psi Replacement Gauge for Nozlrater Diesel Injector Nozzle Tester (11565)Universal 0 to 5000 psi Replacement Gauge for Nozlrater Diesel Injector Nozzle Tester by OTC®. Replacement Gauge for Nozlrater Diesel Injector Nozzle Tester Replacement Gauge For OTC 4200 Nozlrater Diesel Injector Nozzle Tester. Gauge...Replacement gauge for OTC 4200 Nozlrater diesel injector nozzle testerGauge Calibrated 0-5000 PSI (350 bar)$210.44
- OTC®1" to 1-1/16" Oil Pressure Sensor Socket (4673-5)Universal 1" to 1-1/16" Oil Pressure Sensor Socket (4673-5) by OTC®. This product is manufactured to help you maintain and service your oil system. It will make it easier to keep the oil pressure under control for smooth and safe...Manufactured for your oil system maintenanceBuilt to enhance your productivity$19.81
- OTC®10 Pieces Replacement Bulbs for 3642 Circuit Tester (3642-10)Universal 10 Pieces Replacement Bulbs for 3642 Circuit Tester (3642-10) by OTC®. 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$54.61
- OTC®10 Pieces Replacement Bulbs for 3643 Circuit Tester (3643-11)Universal 10 Pieces Replacement Bulbs for 3643 Circuit Tester (3643-11) by OTC®. 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$668.44
- OTC®10' DLC Cable for Each 2 Flash Adapter (3000095)Universal 10' DLC Cable for Each 2 Flash Adapter by OTC®. Designed with maximum accuracy and precision in mind, this tool is the ultimate solution that will help make automotive diagnostic scanning fast and easy. It’s crafted using...High quality at an affordable priceExpertly made from premium materials$197.57
- OTC®12 V Digital Charging System and Battery Tester (3183)Universal 12 V Digital Charging System and Battery Tester by OTC®. Speed. Accuracy. Reliability. These are the cornerstones behind the technology in digital battery testers. 3183 tests 12 volt batteries (125-1400 CCAs) and analyzes by...Utilizes cost effective conductance test technology for accurate testing at a value price pointQuick 1-second initial results$181.24
- OTC®12 V MinuteMan Plus Starter, Charger System and Battery Tester (3130AGM)Universal 12 V MinuteMan Plus Starter, Charger System and Battery Tester by OTC®. MinuteMan Plus saves you hours when you're testing batteries, starters, alternators, regulators, and charging systems. This product has been engineered...Special AGM Test options for accurately diagnosing AGM and spiral (six-pack style) batteriesCan switch between English and Spanish languages with a menu-based selection$2,506.24
- OTC®12" Adapter Cable (216044)12" Adapter Cable by OTC®. Designed with maximum accuracy and precision in mind, this tool is the ultimate solution that will help make automotive diagnostic scanning fast and easy. It’s crafted using the finest materials and...Assists in the vehicle’s diagnostics to help maintain its well-beingBuilt to make the process fast, easy, and reliable$92.12
- OTC®14 mm Deep Well Petrol Compression Tester Adapter (5603)14 mm Deep Well Petrol Compression Tester Adapter (5603) by OTC®. This unique connector allows easy access to hard-to-reach spark plug hole on Hemi style and recessed plug well style heads. This product is made of high-quality materials...Use with OTC compression testers or other compression testersSolid steel 8" length shaft$39.86
- OTC®20' Replacement Cable Kit (3491-13)Universal 20' Replacement Cable Kit (3491-13) by OTC®. Digital Pressure Gauge - 20' cable, No. 3500-05, bead-type temperature probe, assorted fittings. Designed with maximum accuracy and precision in mind, this tool is the ultimate...Assists in the vehicle’s diagnostics to help maintain its well-beingBuilt to make the process fast, easy, and reliable$154.19
- OTC®24' Jumper Lead (3903)Universal 24' Jumper Lead by OTC®. Constructed from high quality polyurethane, these high visibility coil cord test leads have superior memory retention and resistance to grease and oil, making them a perfect compliment to any...Designed for your maintenance needsMade from high-grade material for a long lifespan$25.62
- OTC®25' Nitrogen Coiled Hose for Leak Tamer Plus Evap Smoke Machine (CEA-041)Universal 25' Nitrogen Coiled Hose for Leak Tamer Plus Evap Smoke Machine by OTC®. Optional accessory for No. 6521, 25 ft. nitrogen coiled hose. Keep your pride and joy running in tip-top shape with this top-grade automotive product....Perfect solution for leak detectionJust the way to get the job done quickly and hassle free$87.53
- OTC®3-piece Back Probe Kit (3840-05)Universal 3-piece Back Probe Kit by OTC®. The exclusive vehicle-specific database in the 3840F contains information for most domestic vehicles as well as many imports. The Scope also recommends the appropriate test procedures for fast,...Designed for your maintenance needsMade from high-grade material for a long lifespan$17.73
- OTC®500 psi Pressure Sensor (3491-01)Universal 500 psi Pressure Sensor by OTC®. This product is manufactured to help you maintain and service your oil system. It will make it easier to keep the oil pressure under control for smooth and safe operation of the system. The...Manufactured for your oil system maintenanceBuilt to enhance your productivity$306.89
- OTC®6 V/12 V Starter, Charger System and Battery Tester (3914)Universal 6 V/12 V Starter, Charger System and Battery Tester by OTC®. Perform wireless battery and system tests directly from the OTC Encore and Evolve scan tools. This product has been engineered and designed to help you with your...Test automotive batteries and create health reportsWorks on automotive batteries - regular flooded, enhanced flooded, AGM, EV and start-stop.$305.18
- OTC®ADS 325 Diagnostic Scan Tool (3925)Universal ADS 325 Diagnostic Scan Tool by OTC®. Optimizations to the Bosch ADS series software communications and architecture dramatically improve scanning speed performance - touting many of the fastest scan times in the industry....ADS tools now come with Bosch Repair-Source, a comprehensive vehicle service and repair information libraryFull system coverage for Domestic, Asian and European vehicles covering all makes/models$4,557.51
- OTC®ADS 625 Diagnostic Scan Tool (3970)Universal ADS 625 Diagnostic Scan Tool by OTC®. Engineered and assembled in the USA by Bosch, the new Bosch ADS 325 and 625 are automotive scan tools designed for technicians, by technicians. Knowing what technicians need to get the...ADS tools now come with Bosch Repair-Source, a comprehensive vehicle service and repair information libraryFull system coverage for Domestic, Asian and European vehicles covering all makes/models$7,483.02
- OTC®ADS 625X Diagnostic Scan Tool (3975)Universal ADS 625X Diagnostic Scan Tool by OTC®. The Bosch ADS 625X is the next generation of Bosch Diagnostics from the world’s leading diagnostics brand. With flexible subscriptions, ADAS software options, large 10" high resolution...Assists in the vehicle’s diagnostics to help maintain its well-beingBuilt to make the process fast, easy, and reliable$4,345.00
- OTC®Automotive Scope Diagnostic Tool (3840F)Universal Automotive Scope Diagnostic Tool by OTC®. The exclusive vehicle-specific database in the 3840F contains information for most domestic vehicles as well as many imports. The Scope also recommends the appropriate test procedures...Assists in the vehicle’s diagnostics to help maintain its well-beingBuilt to make the process fast, easy, and reliable$1,480.51
- OTC®Bosch™ 6 V/12 V Remote Starter Switch (FIX7853)Universal Bosch™ 6 V/12 V Remote Starter Switch by OTC®. Bosch's Remote Starter Switch allows one person to start or crank the engine from under the hood - ideal for a compression test or bumping the piston onto Top Dead Center (TDC)...Power tool type trigger switchHeavy duty neoprene leads$21.53
- OTC®Charged Air Cooler Tester (J-41473)Charged Air Cooler Tester (J-41473) by OTC®. This is the easy way to find air leaks in the charged air cooler systems used on class 7 and 8 truck engines. The tester features a large 2-1/2", 0-60 PSI pressure gauge, regulator and relief...Perfect solution for leak detectionJust the way to get the job done quickly and hassle free$359.08
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.