Diagnostic & Testing

Spark Plug Pliers Two Pulling Positions Help Make Removing Spark Plug Wires A Safe And Easy Job. Specially shaped, cushioned jaws grip the boot straight on or from the side. Plastic handle grips help prevent shock.

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 voltage up to 28 volts By depressing the red button the tester becomes a jumper for powering electrical...

Checks Both Low Voltage and Spark Plug Wires. The low-side checks AC and DC current up to 28 volts with power on. The high-side checks spark plug wires without piercing. Complete with insulated clip.

Quickly Tests Low Voltage up to 28 Volts. A heavy duty circuit tester for lifetime use. The probe, handle, cord and clamp are reinforced for extra durability. Comes with a strain relief spring on the cord.

Quickly Tests Voltage up to 28 Volts. Heavy duty probe, cord and clamp. The probe is insulated with high-visibility shrink tubing to prevent the possibility of shorting the side of the probe to other components. Comes with a strain relief spring on the...

Quick check both AC and DC current up to 28 volts with power on. Helps locate shorts or breaks in wiring. Complete with insulated grounding clip.

Features: This unit does not require ground wire or clip and is safe with ECMs, Sensors, Transducers, Airbags, etc. Designed to be used on DC powered circuits with voltages between 3 and 28 volts Special designed V-Tip needle allows safe piercing and...

Included adapters work interchangeably with banana plugs on the 2 x 15-ft. retractable test leads Used for testing electrical circuits in cars, trailers, boats, etc. 15-ft. wire allows you to connect the leads under the hood and test from the driver’s...

Used for testing electrical circuits Retractable test leads pull out and stay at desired length Rewind test leads into protective case when not in use Contains insulated alligator clips 18 gauge copper wire

Used for testing electrical circuits. Retractable test leads pull out and stay at desired length. Rewind test leads into its own protective case when not in use. Insulated alligator clips. 18 gauge copper wire, 30' total lenth

Quickly and easily checks electrical circuits and accessories on 6 and 12 volt systems Exta long, high visibility wire stretches for use, then automatically retracts Supersharp probe

Features an extra long wire that stretches up to 12 feet for use, then automatically retracts. Quickly and easily check electrical circuits and accessories on 6 and 12 volt systems. Great for use on cars, trucks, boats, trailers, motorcycles, airplanes...