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
- OTC®6' Anti-Static Wrist Strap (7744)Universal 6' Anti-Static Wrist Strap by OTC®. Virtually eliminates the possibility of static electricity causing damage while working on electronic components. One-size-fits-most adjustable wrist strap. Includes a 6' coil cord with...Designed for your maintenance needsMade from high-grade material for a long lifespan$84.94
- OTC®9.6 V Battery Pack (239180)Universal 9.6 V Battery Pack 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, delivering features and...Designed for your maintenance needsMade from high-grade material for a long lifespan$100.78
- OTC®ACC Solarity High Capacity Power Supply/Battery for 3850 Scope Kit (3850-05)Universal ACC Solarity High Capacity Power Supply/Battery for 3850 Scope 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....Designed to help to get your job done rightManufactured utilizing the highest quality materials$140.43
- OTC®Anti-zap Auto Surge Protector (3386)Universal Anti-zap Auto Surge Protector by OTC®. Prevents damage to sensitive electronic systems. Protects key vehicle components from high-voltage spikes. Your electrical system maintenance will be easier with this high-quality...Designed for your maintenance needsMade from high-grade material for a long lifespan$130.18
- OTC®Battery Adapter (212638)Universal Battery Adapter 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, delivering features and...Designed for your maintenance needsMade from high-grade material for a long lifespan$43.11
- OTC®Bosch™ VET 100 Circuit Analysis Tool (3920)Universal Bosch™ VET 100 Circuit Analysis Tool by OTC®. The Bosch VET 100 Circuit Analysis Tool is perfect for data stream analysis using your scan tool. With quick and easy setup, you can identify faulty sensors, wiring harnesses,...Save time and quickly identify failed circuit component, wiring harness or ECMUse with any scan tool during data stream analysis$230.99
- OTC®Diesel Glow Plug Tester (3673)Universal Diesel Glow Plug Tester by OTC®. Glow Plug Tester provides fault detection through LED's for a quick analysis; Short Circuit, Over Current, Normal Operation, Open Circuit/Under Current.Glow Plug Tester allows for testing without removing glow plug from enginePowers the glow plug to test the plug in it's operating state$233.54
- OTC®Ignition Adapter Connector Kit (3579)Universal Ignition Adapter Connector 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...Designed to help to get your job done rightManufactured utilizing the highest quality materials$89.79
- OTC®Parasitic Draw Test Switch (6945)Universal Parasitic Draw Test Switch by OTC®. Test switch is used with an amp meter to isolate parasitic amperage draws on all GM vehicles or any vehicle with a side- or top-post battery. This tool attaches between the negative battery...Designed to help to get your job done rightManufactured utilizing the highest quality materials$112.03
- OTC®Parasitic Draw Tester (7645)Universal Parasitic Draw Tester by OTC®. Finding electrical problems that drain the battery is getting harder all the time. But using No. 7645 with your digital amp meter takes the guesswork out of a complicated job. Attach the test...Designed for your maintenance needsMade from high-grade material for a long lifespan$89.55
- OTC®Standard Terminal Adapter Test Kit (3587)Universal Standard Terminal Adapter Test Kit by OTC®. For the professional electronic diagnostic technician. Set includes an assortment of 28 flexible, color-coded connectors that adapt to Packard WeatherPack, Metri-Pack, and Micro-Pack...Excellent accessory when testing with a scope or meter32-piece standard terminal adapter set for the popular Packard Weather Pack, Metri-Pack, and Micro-Pack style connectors. Multiple external-internal versions of adapter styles$514.38
- Electronic Specialties®12 V Battery Load Tester (700)Universal 12 V Battery Load Tester by Electronic Specialties®. The #700 has an internal loading capacity of 100 amps. It is a great tool for finding batteries that can’t stand up to the load of today’s automotive accessories. It...Internal 100 Amp loading capacityTests battery voltage, relative starter currentwith heat protection draw, charging voltage and battery condition$35.32
- Electronic Specialties®12 V Digital Electrical System and Battery Tester with Printer (726)Universal 12 V Digital Electrical System and Battery Tester with Printer (726) by Electronic Specialties®. Your electrical system maintenance will be easier with this high-quality product. It is specially developed and manufactured for...Accurate Battery & Electrical System TesterFeatures programmed test for new Start/Stop Batteries$262.03
- Electronic Specialties®12 V Pro Relay Tester (191)Universal 12 V Pro Relay Tester by Electronic Specialties®. Relay Buddy is a quick go / no-go tester for the most common automotive relays. With the included adapters, Relay Buddy now tests 5 different relay types and also tests...Designed for your maintenance needsMade from high-grade material for a long lifespan$131.43
- Electronic Specialties®12 V Relay Tester (190)Universal 12 V Relay Tester by Electronic Specialties®. Relay Buddy is a quick go / no-go tester for the most common automotive relays. It provides you with an indication of the general health and functioning of the relay switch...Quick off-the-car relay testerChecks relay coil and switch contacts$60.83
- Electronic Specialties®2 Pieces Replacement Thermal Printer Papers (726-1)Universal 2 Pieces Replacement Thermal Printer Papers by Electronic Specialties®. Your electrical system maintenance will be easier with this high-quality product. It is specially developed and manufactured for your electrical system...Designed to help to get your job done rightManufactured utilizing the highest quality materials$6.52
- Electronic Specialties®70-Piece Diagnostic Test and Terminal Set (846)Universal 70-Piece Diagnostic Test and Terminal Set by Electronic Specialties®. Your electrical system maintenance will be easier with this high-quality product. It is specially developed and manufactured for your electrical system...Clear storage case included & helps you stay organizedWorks with Multimeters and digital scopes$152.16
- Electronic Specialties®Essentials Of Electrical Power Generation (183)Universal Essentials Of Electrical Power Generation by Electronic Specialties®. This is Dan Sullivan's 2nd book, which covers everything you need to know regarding Electric Power Generation from RV generators to large Gensets. Dan lends...Designed for your maintenance needsMade from high-grade material for a long lifespan$44.21
- Electronic Specialties®Fuse Buddy™ 12 V/24 V Relay Tester (316)Universal Fuse Buddy™ 12 V/24 V Relay Tester by Electronic Specialties®. Your electrical system maintenance will be easier with this high-quality product. It is specially developed and manufactured for your electrical system...Is it a circuit problem or a relay problem?Relay Fuse Buddy can help diagnose the case$85.70
- Electronic Specialties®Fuse Buddy™ 30 A Mini Tester (305M)Universal Fuse Buddy™ 30 A Mini Tester by Electronic Specialties®. Your electrical system maintenance will be easier with this high-quality product. It is specially developed and manufactured for your electrical system maintenance...Great for motor blowersOriginal fuse is replaced in-line during testing, thereby maintaining circuit protection$29.79
- Electronic Specialties®Fuse Buddy™ ATC Current Loop (308B)Universal Fuse Buddy™ ATC Current Loop (308B) by Electronic Specialties®. Just clamp your current probe over the loop to access the amperage draw through a fused circuit. Easy testing access, plugs right into fuse socket, no more hand...Designed to help to get your job done rightManufactured utilizing the highest quality materials$15.63
- Electronic Specialties®Fuse Buddy™ Current Loop Kit (309A)Universal Fuse Buddy™ Current Loop Kit by Electronic Specialties®. Your electrical system maintenance will be easier with this high-quality product. It is specially developed and manufactured for your electrical system maintenance...Plug in Fuse Buddy and read circuit amp drawsEasy test connection into fused circuits$32.99
- Electronic Specialties®Fuse Buddy™ Mini Current Loop (307M)Universal Fuse Buddy™ Mini Current Loop (307M) by Electronic Specialties®. Just clamp your current probe over the loop to access the amperage draw through a fused circuit. Easy testing access, plugs right into fuse socket, no more...Designed to help to get your job done rightManufactured utilizing the highest quality materials$15.63
- Electronic Specialties®LOADpro™ 12 V/48 V Dynamic Test Leads (185)Universal LOADpro™ 12 V/48 V Dynamic Test Leads by Electronic Specialties®. This new version of LOADpro is capable of loading circuits as high as 48 volts. 185 can be deployed on Electrical System ranging from 12 volts up to 48 volts....Use on 12V to 48V circuitsPerforms voltage drop test with the push of a button$67.40
- Electronic Specialties®Maxi Relay Adapters (190-8)Universal Maxi Relay Adapters by Electronic Specialties®. Had consistent and regular requests from dealers and end users to add a sixth adapter to the Relay Buddy test system. The relay in question is a popular 50 Amp relay used on...Adapter allows testing of heavy duty 4-pin Maxi relays - commonly used in Heavy DutyRelay adapter plugs into Relay Buddy first$21.01
- Electronic Specialties®Profesional Fuse Buddy Test Kit (310)Profesional Fuse Buddy Test Kit by Electronic Specialties®. Failure to properly maintain the electrical system can result in its damage and costly repairs. Do everything right the first time. Inspect and keep the electrical system in a...Intended to help you do the maintenance job with ease and comfortCrafted using leading-edge technology for maximum functionality$80.89
- Electronic Specialties®Relay Buddy™ 12 V/24 V Pro Relay Tester (192)Universal Relay Buddy™ 12 V/24 V Pro Relay Tester by Electronic Specialties®. Relay Buddy 12/24 is a quick go / no-go tester for the most common automotive relays. This new version Relay Buddy tests both 12 and 24 volt relays. If the...Quick off-the-car relay testerChecks relay coil & switch contacts$65.21
- Electronic Specialties®Relay Buddy™ 12 V/24 V Pro Relay Tester Kit (193)Universal Relay Buddy™ 12 V/24 V Pro Relay Tester Kit by Electronic Specialties®. Relay Buddy 12/24 Pro Test Kit tests five different relays. Relay Buddy is a quick go / no-go tester for the most common automotive relays and this new...Quick off-the-car relay testerChecks relay coil & switch contacts$141.88
- Electronic Specialties®Troubleshooting Book (184)Universal Troubleshooting Book by Electronic Specialties®. Complete 200-page guide to all aspects of electrical equipment troubleshooting - explained in a way that makes it useful in the store. Written by a mechanic for real, practice...Batteries/TestingRelays, potentiometers, resistors, and solenoids$52.82
- S&G Tool Aid®12 V Intermittent Short Finder Short Finder (25300)Universal 12 V Intermittent Short Finder Short Finder by S&G Tool Aid®. Use this device with audio signal to indicate when intermittent short circuit occurs with vehicle at rest or on road test. After faulty system is indicated, use to...Use this short finder with audio signal to indicate when intermittent short circuit occurs with vehicle at rest or on road testAfter faulty system is indicated, use to find short location$69.14
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.