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
- MotoRad®Red Fail Calibration Cap (12412S)Universal Red Fail Calibration Cap by MotoRad®. 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$72.06
- MotoRad®Tan with Grey Ring Quick-On Fuel Cap Tester Adapter (12422S)Universal Tan with Grey Ring Quick-On Fuel Cap Tester Adapter (12422S) by MotoRad®. 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...Designed for your fuel system maintenanceMade from quality materials to survive the test of time$13.43
- OTC®30 to 110 Diesel Fuel Hydrometer (6750)Universal 30 to 110 Diesel Fuel Hydrometer by OTC®. Quickly troubleshoot engine performance problems and measure #1 and #2 grade diesel fuel quality. The hydrometer measurements are given as an American Petroleum Institute (API) gravity...Designed for your fuel system maintenanceMade from quality materials to survive the test of time$225.87
- OTC®6 V/12 V/24 V Battery Tester with Printer (1699200244)Universal 6 V/12 V/24 V Battery Tester with Printer by OTC®. The BAT 135 battery tester with integrated printer tests 6V and 12V batteries from 40 - 2,000 CCA including AGM, Gel cell, flooded lead-acid, start/stop EFB and Commercial SLI...Presents State of Health and State of Charge percentageIntegrated printer to capture test results and customer records$465.31
- OTC®6 V/12 V/24 V Heavy Duty Battery Tester (BAT155)Universal 6 V/12 V/24 V Heavy Duty Battery Tester by OTC®. Your electrical system maintenance will be easier with this high-quality product. It is specially developed and manufactured for your electrical system maintenance needs,...Designed for your maintenance needsMade from high-grade material for a long lifespan$705.06
- OTC®Antifreeze and Coolant Tester (100)Universal Antifreeze and Coolant Tester 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, this product by OTC® will last a...Superior grade materials for unbeatable safety and comfortExpertly crafted utilizing advanced technologies$38.29
- OTC®Bosch™ ADS Basic 1-Year Subscription Card (3945-SUB-BAS)Universal Bosch™ ADS Basic 1-Year Subscription Card 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...Includes full access to all Domestic/Asian/European coverage additions for 12 monthsUpdates to Code-Assist - access millions of confirmed fixes powered by Identifix$750.00
- OTC®Bosch™ ADS Enhanced 1-Year Subscription Card (3945-SUB-ENH)Universal Bosch™ ADS Enhanced 1-Year Subscription Card by OTC®. The 3945-SUB-ENH Enhanced Plan software subscription includes 12-months access to software and coverage updates for the Bosch ADS X. This product is made of high-quality...Includes full access to all Domestic/Asian/European coverage additions for 12 monthsUpdates to Code-Assist - access millions of confirmed fixes powered by Identifix$1,150.00
- OTC®Cable (3101-33)Universal 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$442.13
- OTC®EVAP Access Port Tool (6787)Universal EVAP Access Port Tool by OTC®. Diagnose all GM 5/16" EVAP line systems. This adapter connects into the EVAP system line at the canister quick-connect fitting. An EVAP port fitting allows EVAP system testing and diagnosis. Use...Diagnose GM EVAP systemsWorks on all GM EVAP line systems$88.92
- OTC®Fuel Pressure Test Adapter (6780)Fuel Pressure Test Adapter by OTC®. Adapts to fuel system for use during pressure testing and diagnostic procedures. This product is designed and manufactured to help you keep the fuel system of your vehicle in mint condition. It will...Designed for your fuel system maintenanceMade from quality materials to survive the test of time$44.18
- OTC®Heavy Duty Allison Diagnostic WTEC II & III Software (3101-61)Universal Heavy Duty Allison Diagnostic WTEC II & III Software by OTC®. Your electrical system maintenance will be easier with this high-quality product. It is specially developed and manufactured for your electrical system maintenance...Designed for your maintenance needsMade from high-grade material for a long lifespan$884.82
- OTC®Heavy-Duty MPC WTEC II and III Software (3101-63)Heavy-Duty MPC WTEC II and III Software (3101-63) 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...Assists in the vehicle’s diagnostics to help maintain its well-beingBuilt to make the process fast, easy, and reliable$990.04
- OTC®Mac V-Mac III MPC Software (3101-45)Universal Mac V-Mac III MPC Software 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...Assists in the vehicle’s diagnostics to help maintain its well-beingBuilt to make the process fast, easy, and reliable$886.65
- OTC®Meritor Software (3101-14)Universal Meritor Software 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$763.96
- OTC®Photo-Tac Probe for Photo Tachometer (45329)Universal Photo-Tac Probe for Photo Tachometer by OTC®. 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. Manufactured...Made to high standards of qualityDesigned to provide the ultimate in practicality$324.92
- OTC®Robinair™ R-ID Plus Refrigerant Analyzer (16995)Universal Robinair™ R-ID Plus Refrigerant Analyzer by OTC®. The Robinair R-ID Plus Refrigerant Analyzer is a tool to meet the service needs of technicians working on vehicles equipped with either R134A or the newer R-1234yf...Quickly and accurately determine refrigerant purityDisplays amount of R-1234yf, R-134a, R-12, R-22 and Hydrocarbons in percentage$5,293.30
- OTC®Spark Tester Kit (6590)Universal Spark Tester Kit 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 quality...Designed to help to get your job done rightManufactured utilizing the highest quality materials$26.62
- S&G Tool Aid®0 to 300 psi Analog Gauge for 34000 Compression Tester (34001)Universal 0 to 300 psi Analog Gauge for 34000 Compression Tester (34001) by S&G Tool Aid®. 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...Designed to help to get your job done rightManufactured utilizing the highest quality materials$73.73
- S&G Tool Aid®0 to 50 psi Fuel Injection Pressure Gauge (33966)Universal 0 to 50 psi Fuel Injection Pressure Gauge by S&G Tool Aid®. 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...Designed for your fuel system maintenanceMade from quality materials to survive the test of time$15.74
- S&G Tool Aid®12 x 1.25 mm Gasoline Compression Test Adapter (34303)Universal 12 x 1.25 mm Gasoline Compression Test Adapter by S&G Tool Aid®. 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...Designed to help to get your job done rightManufactured utilizing the highest quality materials$15.81
- S&G Tool Aid®24" Fuel Injection Pressure Tester Hose (33916)Universal 24" Fuel Injection Pressure Tester Hose (33916) by S&G Tool Aid®. 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...Designed for your fuel system maintenanceMade from quality materials to survive the test of time$26.08
- S&G Tool Aid®3/16" x 1/8" NPT 6' Automatic Transmission Pressure Tester Hose (34502)Universal 3/16" x 1/8" NPT 6' Automatic Transmission Pressure Tester Hose by S&G Tool Aid®. 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...Manufactured for your oil system maintenanceBuilt to enhance your productivity$43.25
- S&G Tool Aid®6 V/12 V Heavy Duty Circuit Tester with 12' Retractable Wire and Battery Clip (27300)Universal 6 V/12 V Heavy Duty Circuit Tester with 12' Retractable Wire and Battery Clip by S&G Tool Aid®. Your electrical system maintenance will be easier with this high-quality product. It is specially developed and manufactured for...Designed for your maintenance needsMade from high-grade material for a long lifespan$14.74
- S&G Tool Aid®Analog Replacement Lens for 34563 Gauge (33975)Universal Analog Replacement Lens for 34563 Gauge (33975) by S&G Tool Aid®. 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...Designed to help to get your job done rightManufactured utilizing the highest quality materials$7.92
- S&G Tool Aid®Coil Tester Extension (23974)Universal Coil Tester Extension by S&G Tool Aid®. 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$6.18
- S&G Tool Aid®Coupler Quick Male (34743)Universal Coupler Quick Male by S&G Tool Aid®. 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$5.02
- S&G Tool Aid®Replacement Lens for 34704 Gauge (34717)Universal Replacement Lens for 34704 Gauge (34717) by S&G Tool Aid®. 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...Designed to help to get your job done rightManufactured utilizing the highest quality materials$10.35
- S&G Tool Aid®Short Adapter (34008)Universal Short Adapter by S&G Tool Aid®. 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 features and...Designed for your maintenance needsMade from high-grade material for a long lifespan$23.43
- S&G Tool Aid®Tee (33908)Universal Tee by S&G Tool Aid®. These practical and effective audio/video installation tools are right what the ordered for proper audio/video installation. They will give you maximum convenience when installing your in-vehicle...Designed for your fuel system maintenanceMade from quality materials to survive the test of time$5.62
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.