SKU 94130 For technical questions please call 1-800-444-3353. Page 4
Unpacking
When unpacking the 3 Piece Circuit Tester Kit, check to make sure parts on pages 5 and 6 are
included. If any parts are missing or broken, please call HARBOR FREIGHT TOOLS at
1-800-444-3353.
Operation
Your Circuit Tester comes completely assembled. It is important that you read the entire manual to
become familiar with the product BEFORE you use the Circuit Testers.
The 3 Piece Circuit Tester Set contains each of the following Circuit Testers:
A: Self-Powered Electrical Continuity Tester. Use this tester to test for continuity with the
power disconnected. For use on recreational and general automotive vehicles.
Operation: This Tester requires one “AA” battery. Disconnect the vehicle battery. Attach
the Alligator Clip (12A) to a ground of the vehicle, such as the vehicle’s body. Poke the tip of
the Probe (1A) through the wire’s jacket and touch the metal of the wire. If the circuit is
complete, the Bulb (7A) will illuminate; this indicates there is electricity flowing through
the circuit. No illumination of the bulb indicates no electricity flowing through the circuit and
that repair or replacement of the components being tested is needed.
B: Heavy Duty Circuit Tester (Green) for 18, 24, and 36 Volt systems. Use this tester to check
AC or DC wiring up to 36 Volts. Use to check series-parallel switches and solenoid on
tractor-trailer starter systems.
Operation: Use this tester with the battery connected. The vehicle does not have to be
running. Connect the Alligator Clip (11B) to the vehicle as a ground; or connect it to the
negative battery post. Poke the tip of the Probe (1B) through the wire’s housing and
touch the metal of the wire. If the circuit is complete the Bulb (6B) inside the Handle (7B)
will illuminate; this indicates there is electricity flowing through the circuit. No illumination of
the Bulb (7B) indicates no electricity flowing through the cirecuit and that repair or
replacement of the components being tested is needed.
C. High and Low Voltage Tester: Use this tester to check primary circuits of 6 and 12 Volts. Use
to trouble shoot both primary and secondary circuits. On secondary or high voltage circuits
you can check spark plugs or distributor caps. To test spark plugs and secondary (ignition)
circuit, do not ground clip. Attach clip to nose of plastic probe housing. With engine idling,
run probe of tester along wire from distributor to plugs. To test plugs, insert probe through
plug cap. Extreme brightness of long bulb flashes is sign of high resistance or plug gap is
set too far apart. Bright even flashes indicate normal ignition. Extreme dimness indicates
low resistance and means carbon deposits have formed on plug electrodes or plug is not
firing properly for other reasons. Remove plug for closer check after cleaning.
To avoid serious injury form electrical shock,
DO NOT TOUCH the probe with your bare
hands while preforming high voltage test!
Rev 12/05; REV 12/06
(11 Seiten)
(4 Seiten)
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