CIRCUIT TESTERS

• Most widely used automotive circuit tester.
• Quickly checks all 6 and 12 volt systems.
• Use with power on.
• Includes 48" ground wire.
• Use to locate shorts, grounds and open circuits.

If you're looking for a reliable solution to complete your project, this 1st-grade product is right up your alley. Designed utilizing the finest materials, it delivers unmatched levels of durability and strength needed to provide long-lasting service life. Superior in functionality, it will help you make any job easier and faster.

FEATURES:

• "Circuit Master" is the modern universal circuit tester for all vehicles. Use to test all primary electrical circuits plus any on-board computer systems.
• Test computer circuits without fear of causing damage to expensive electronic components. Completely safe to use on microprocessor control modules.
• Operating range from 3-15 volts.
• Current draw is less than 21 milliamps at 12 volts D.C.
• Long life LED glows when voltage is sensed at probe and indicates polarity:
  Red = + (Positive)                    Green = - (Negative)
• Use to locate shorts, opens and intermittents.
• Made of high impact chemical resistant plastic.
• Supplied with a 4 foot ground wire.
• All solid state construction.
• "Circuit Master" is supplied with Protect-A-Terminal, Probe Adapter (Part No. 21713), which will not deform sensitive female terminals at computer connections.

This product has been discontinued

26025 S&G Tool Aid 24-40 Volt Circuit Tester

26050 S&G Tool Aid High and Low Voltage Circuit Tester . Two electrical testers in one! Trouble shoots both primary and secondary circuits. Checks spark plugs,plug wires and distributor cracks. Test for shorts,grounds and open circuits with power on for 6 and 12 volt systems. The best available value in a circuit tester. Made of durable,non-conductive plastic.

• Checks AC and DC wiring up to 36 volts
• Use to check series-parallel switches and solenoids on tractor-trailer starter systems
• An absolute must for the trucking, farm, heavy equipment and trailer industries
• 48" ground wire

SELF POWERED ELECTRICAL CONTINUITY TESTER

Features:
•Use to test for continuity with power disconnected.
•Excellent for use on marine, recreational and general automotive vehicles.
•Test appliances and other electrical circuits with power off.
•Supplied with 48" lead wire.
•Uses any AA 1.5 volt battery. Battery not supplied.
•Replacement Bulb Part No. 22707

• Troubleshoot virtually all domestic and imported cars, SUV's and trucks.
• Use for testing newer vehicles with recessed spark plugs and conventional and coil-on plug ignition systems.
• Flashing bulb indicates ignition or fuel delivery problems.
• Provides information not available with OBD II code reading devices - pinpoints if there is a spark plug, plug wire, mechanical, fuel injection or electrical problem.
• Shows a duplicate view of the ignition spark so technician can visually check condition of ignition system at each cylinder. 
• Frequency and intensity of flash indicates whether there is an ignition system problem or fault in the fuel delivery system.
• Safety orange color for easy visibility.

Designed to withstand the most rugged use

• The best quality electrical circuit tester available for checking 6 and 12 volt systems.
• Has heavy duty ground clip and insulator.
• 5` of tough, flexible, heavily insulated rubber wire is retained in spring supported strain relief designed to withstand the most rugged use.
• Made to last a lifetime!
• Bulb is easily replaced. Replacement Bulb Part No. 27010 (G.E. 1889 or equivalent).

• Use to quickly troubleshoot ignition system.
• Device is "hands free" and connects in-line between spark plug and spark plug wire.
• Shows a duplicate view of the ignition spark and checks the condition of ignition system at each cylinder.
• Frequency and intensity of flash indicates whether there is an ignition system problem or a fault in the fuel delivery system.
• Connects in-line between the spark plug and the ignition wire
• Technician can visually check condition of ignition system at each cylinder
• Frequency and intensity of flash indicates whether there is an ignition system problem or a fault in the fuel delivery system
• The bright light can be seen in the bright sunlight.

How to Use