Electrical Testers

Test two new relays with your Relay Buddy! 2 pack of adapters allows testing of two new relay types - commonly used for fuel pumps and other power...

Voltage drop test with the push of a button Finds corroded wires/connections and shorts to ground Diagnose faster and earn more $$$ - works with y...

Fundamental Electrical Troubleshooting Complete 200 page guide to every aspect of electrical troubleshooting – explained in a way that makes is us...

Kit Makes Testing Relays or Live Circuits Quick and Easy. Extends the Functionality of a DMM. Turns All Fuse and Relay Boxes into Test Points. Inc...

Set of Four Relay Test Jumpers Make Testing Relays or Live Circuits Quick and Easy. Set includes four jumpers to fit the most popular size relays ...

Heavy Duty Automotive Logic Probe Computer safe for 6, 12 and 24 volt systems. Dual color LED indicates red for power and green for ground. 6' Lea...

Expands the testing capability of your Relay Buddy!!! 3 pack of adapters allows testing of shielded relays. Adapters set cover the same 3 types of...

Provides a good ground for test light and multimeter diagnostic use Especially useful in the auto industry where testing is Especially useful in t...

A 2-in-1 Tester that Tests Circuits up to 28 Volts and Works as a Jumper Wire for Power or Ground Heavy-duty circuit tester for checking low volta...

Blowing Fuses? Plug in the Fuse Buddy and read circuit amperage draw on your DMM Adapts your DMM to plug directly into ATC Blade fuse socket Origi...

ATO fuse holder in-line Provides extra overload protection Can prevent your DMM's internal fuse from blowing For use with any digital multi-meter

Heavy-Duty Circuit Tester with Digital LCD Display to Accurately Show DC Voltage Operating range of 3-30 volts DC work son most vehicle electrical...

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 i...

Use to locate shorts quickly and inexpensively in 12 volt automotive circuits Eliminates need to remove upholstery and floor coverings Operates th...

Fully graphical display solves language barrier issues Multi-function testing of battery, starter, alternator, earth ground Test 12V batteries and...

Designed to test any type of non-live electrical circuit. Track down broken wires, bad grounds and blown fuses quickly. Features and Benefits Comes...

Use with 56810 or 60610 to Easily and Securely Connect Relay Test Jumper to a Multimeter Can also use banana plug to pin probe adapter with pin pr...

Stop the guess work and repair intermittent electrical connections. Recondition your electrical connections with the 8045 Plow Connector Terminal C...

180 LOADpro Test Leads load the circuit to see if current can flow. LOADpro finds these problems quicker: High Corrosive Resistance Shorts to Grou...

Everything Needed for North American Trucks and Trailers! Test all trailers Test all vehicle tow circuits Clean all truck and trailer electrical c...

TERMINAL CONNECTOR CLEANERS FOR 4, 5, 6, 7 WAY TRAILER CONNECTORS & MORE! Maintenance Tools For Automotive Connectors & Terminals The Firs...

The 76 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...

Professional Timing Light with High Visibility LED display Measures ignition spark advance from 0-90 degrees 2 and 4 Stroke Tachometer measures en...

Tests both 12V and 24V relays 3 diagnostic trouble codes help define the cause of the bad relay Available as stand alone tester #192 and in kit fo...