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
- S&G Tool Aid®12 V Short Finder Circuit Tester (25100)Universal 12 V Short Finder Circuit Tester by S&G Tool Aid®. Use to locate shorts quickly and inexpensively in 12 volt automotive circuits. Eliminates need to remove upholstery and floor coverings. Operates through metal parts, panels,...Use to locate shorts quickly and inexpensively in 12 volt automotive circuitsEliminates need to remove upholstery and floor coverings$46.94
- S&G Tool Aid®30" Jumper Twins Test Leads (22900)Universal 30" Jumper Twins Test Leads 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,...Designed for your maintenance needsMade from high-grade material for a long lifespan$8.50
- S&G Tool Aid®Finger Saver Wire Clamp (21250)Finger Saver Wire Clamp 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 great...Designed to help to get your job done rightManufactured utilizing the highest quality materials$7.96
- S&G Tool Aid®Perma-Coil™ Jumper Test Leads (23150)Universal Perma-Coil™ Jumper Test Leads 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,...High quality retractile leads for all purpose circuit jumping and testingEliminates tangling$20.28
- S&G Tool Aid®Protect-A-Terminal™ 6 V/12 V/24 V Computer Safe Automotive Circuit Tester (28100)Universal Protect-A-Terminal™ 6 V/12 V/24 V Computer Safe Automotive Circuit Tester by S&G Tool Aid®. Your electrical system maintenance will be easier with this high-quality product. It is specially developed and manufactured for...Our most computer safe circuit testerHigh impedance - the current draw is less than 7 milliamps to protect all vehicle circuits$15.12
- S&G Tool Aid®Protect-A-Terminal™ 6 V/12 V/24 V Heavy Duty Automotive Circuit Tester (28000)Universal Protect-A-Terminal™ 6 V/12 V/24 V Heavy Duty Automotive Circuit Tester 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...Our most computer safe circuit testerHigh impedance - the current draw is less than 7 milliamps to protect all vehicle circuits$14.11
- ATD®12 V 500 A Variable Carbon Pile Battery Load Tester (5489)Universal 12 V 500 A Variable Carbon Pile Battery Load Tester by ATD®. Your electrical system maintenance will be easier with this high-quality product. It is specially developed and manufactured for your electrical system maintenance...Tests 12V batteries, alternators and startersTests batteries to 1000 CCA$115.36
- ATD®3 V to 30 V Heavy Duty Cordless Circuit Tester (55033)Universal 3 V to 30 V Heavy Duty Cordless Circuit Tester by ATD®. Your electrical system maintenance will be easier with this high-quality product. It is specially developed and manufactured for your electrical system maintenance needs,...3V to 30V detection range of DC voltageBi-directional polarity testing: Power and Ground$52.46
- ATD®3 V to 48 V Digital Circuit Tester (55045)Universal 3 V to 48 V Digital Circuit Tester by ATD®. 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...Large, backlit LCD display for visible voltage readingsDesigned for your maintenance needs$30.60
- ATD®6 V to 36 V Electronic Battery and Charging, Starting Systems Tester (5491)Universal 6 V to 36 V Electronic Battery and Charging, Starting Systems Tester by ATD®. Your electrical system maintenance will be easier with this high-quality product. It is specially developed and manufactured for your electrical...Tests all 6 & 12V Lead Acid, AGM and Gel batteriesTests 6/12/24/36V starting/charging systems$451.52
- ATD®6 V/12 V 100 A Battery Load Tester (5488)Universal 6 V/12 V 100 A Battery Load Tester by ATD®. 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...Completely portable - external power source not required. Complete test done in 10 secondsHeavy duty, shock-resistant ventilated cover. Heavy duty, color-coded copper-plated clamps$26.86
- Associated Equipment®0 to 12 V 125 A Alternator or Battery Tester (6031)Universal 0 to 12 V 125 A Alternator or Battery Tester by Associated Equipment®. Tests for defective alternators diodes including GM trio test, and performs complete battery test as well. 125 amp load checks state of charge on...Powerful PerformanceTests for defective alternatordiodes including GM trio test$162.86
- Associated Equipment®0 to 16 V 1000 A Carbon Pile Battery Load Tester (6036B)Universal 0 to 16 V 1000 A Carbon Pile Battery Load Tester (6036B) by Associated Equipment®. 1000 AMP Load Tester Ideal for battery distributors, high volume testing, and fleet use. High resolution carbon pile assembly, featuring unique...High RPM fan cools for continuous battery testingVoltmeter leads are protected with PVC tubing around cable$1,622.27
- Associated Equipment®0 to 16 V 125 A Durable Handheld Battery Tester (6029)Universal 0 to 16 V 125 A Durable Handheld Battery Tester by Associated Equipment®. Tests battery state of charge, cranking ability, charging system output Checks for excessive stater motor draw. This product is made of high-quality...Powerful PerformanceTest 6 and 12 volt batteries alternators and starters$124.38
- Associated Equipment®0 to 16 V 135 A Handheld Battery Load Tester (6026)Universal 0 to 16 V 135 A Handheld Battery Load Tester by Associated Equipment®. This test evaluates the battery's ability to crank an engine. The tester draws current from the battery while measuring its voltage level. The voltage...Great value priced battery testerCables extend out from bottom of handle for safe and convenientuse$75.02
- Associated Equipment®0 to 16 V 500 A Carbon Pile Battery Load Tester (6034)Universal 0 to 16 V 500 A Carbon Pile Battery Load Tester (6034) by Associated Equipment®. Carbon Pile Load Tester 500 AMP value packaged Carbon Pile tester handles all 6/12 Volt batteries. This product has been engineered and designed...Two large Analog meters display amperes and voltsDC test leads are cable$155.06
- Associated Equipment®0 to 16 V 60 A/125 A Handheld Digital Combo Battery Load Tester (6028DL)Universal 0 to 16 V 60 A/125 A Handheld Digital Combo Battery Load Tester by Associated Equipment®. Your electrical system maintenance will be easier with this high-quality product. It is specially developed and manufactured for your...With two loads: a 60A load to test smaller batteries and a 125A load to fully test larger batteries for both CCA andA hoursMid-sized clamps offer greater flexibility when attaching the hard to reach applications$173.86
- Associated Equipment®0 to 20 V 600 A Battery Load Tester (6039)Universal 0 to 20 V 600 A Battery Load Tester (6039) by Associated Equipment®. Easy-to-read DIGITAL voltmeter and ammeter combine with the versatility of a carbon pile load to give a quick and precise determination of battery and...Spring loaded to shut off automaticallyThis tester has unique curved discs to prevent hot spots$962.26
- Associated Equipment®0 to 32 V 1000 A Battery Load Tester (6036B-24)Universal 0 to 32 V 1000 A Battery Load Tester (6036B-24) by Associated Equipment®. 1000 AMP Load Tester. All the same features as the 6036B with the added value of 24 Volt battery testing capability. Using a dual scale meter and a...Tests batteries up to 2000 CCANarrow threaded shaft for fine adjustment$1,800.64
- Associated Equipment®0 to 32 V 500 A Battery Load Tester with Cart (6042)Universal 0 to 32 V 500 A Battery Load Tester with Cart (6042) by Associated Equipment®. Designed with the highest quality and versatility in mind. Interprets data from the charging/starting system on easy-to-read LED display voltmeter...500A safety clamps with “Flexi-Spring” and patented side terminal adapter plus separate light gauge test leads for tighter spotsHeavy-duty single extruded leads for testing up to 15 feet apart$1,955.58
- Associated Equipment®12 V Handheld Digital Battery, Alternator, Starter Tester with Thermo Printer and USB port (12-1015)Universal 12 V Handheld Digital Battery, Alternator, Starter Tester with Thermo Printer and USB port (12-1015) by Associated Equipment®. The utilization of the latest advanced technologies in battery testing had enabled this Analyser to...Stores last test series with or without powerBattery test displays:$431.23
- Associated Equipment®24 V 500 A Automatic Battery and Electrical System Tester with Cart (6044-C)Universal 24 V 500 A Automatic Battery and Electrical System Tester with Cart (6044-C) by Associated Equipment®. An automated battery testing unit that uses no dirty, maintenance-prone carbon piles. Just enter the discharge current,...Easy-to-read LED voltmeter and ammeter500A safety clamps with “Flexi-Spring” and patented side terminal adapters$2,291.08
- Associated Equipment®6 V to 32 V 125 A Handheld Alternator and Battery Tester (6024)Universal 6 V to 32 V 125 A Handheld Alternator and Battery Tester by Associated Equipment®. Full 125A load tests; 12 volt and 24 volt batteries, alternators and starters on all types of vehicles. This product is made of high-quality...Lightweight and easy to useHand-held testers have recessed meters to protect from damage$186.48
- Associated Equipment®7 V to 19 V 125 A Digital Battery Load Tester (6033)Universal 7 V to 19 V 125 A Digital Battery Load Tester by Associated Equipment®. Digital 125 Amp load tester that computes the CCA of the battery. The heavy load enables the 6033 to detect bad batteries that are sometimes missed by the...Kelvin connected digital meter displays the following values:Current Battery Voltage$167.84
- Associated Equipment®9 V to 36 V Handheld Digital Battery Load and Electrical System Tester with Printer (12-2415)Universal 9 V to 36 V Handheld Digital Battery Load and Electrical System Tester with Printer by Associated Equipment®. The model 12-2415 analyzer performs 12V battery and Electrical System testing including the ripple diode test and...Fully graphical display solves language barrier issuesMulti-function testing of battery, starter, alternator, earth ground$471.40
- Astro Pneumatic Tool®3.5 V to 60 V Digital Circuit Tester (7767)Universal 3.5 V to 60 V Digital Circuit Tester by Astro Pneumatic Tool®. Your electrical system maintenance will be easier with this high-quality product. It is specially developed and manufactured for your electrical system maintenance...Digital display to read the accurate voltage valueLCD indication for power (Red) and ground (Green)$24.50
- Auto Meter®6 V/12 V 800 A Variable Electrical System and Battery Load Tester (SB-5/2)Universal 6 V/12 V 800 A Variable Electrical System and Battery Load Tester (SB-5/2) by Auto Meter®. Heavy-Duty repair shops and battery warehouses rely on unparalleled quality and durability of the SB-5/2. An industry standard for over...Automatic safety un-loader knobFan cooling offers built-in protection against overheating$955.87
- Auto Meter®DPL Technology™ 6 V/12 V 40 A Intelligent Handheld Battery Tester (SB-300)Universal DPL Technology™ 6 V/12 V 40 A Intelligent Handheld Battery Tester (SB-300) by Auto Meter®. AutoMeter's SB-300 is a handheld battery tester that is a great addition to any technician's toolbox! This tester will help you...Tests flooded, deep cycle, and AGM batteries with also detects discharged batteries, bad cells, and has built in reverse polarity protectionThis tester applies a true load to the battery in order to simulate real world operating conditions consistent$414.36
- Battery Doctor®12 V/24 V Circuit and Spark Plug Tester (21049)Universal 12 V/24 V Circuit and Spark Plug Tester by Battery Doctor®. Battery Doctor’s high quality tester instantlylocates wiring problems such as bad con-nections, faulty or broken wires and socketsin 12V to 24V systems. A light...Designed for your maintenance needsMade from high-grade material for a long lifespan$16.43
- CDI Electronics®Diagnostic Test Kit (511-9904)Universal Diagnostic Test Kit by CDI Electronics®. 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$722.57
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.