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Please read and save these instructions. Read through this owner’s manual carefully before using product. Protect 

Operating Instructions and Parts Manual 

 

 

 

 

        1EKN8 

yourself and others by observing all safety information, warnings, and cautions. Failure to comply with instructions could 
result in personal injury and/or damage to product or property. Please retain instructions for future reference. 

 

  

 
 
 

PROFESSIONAL CIRCUIT 
TESTER 

 

Description  

 

Easy to use screwdriver probe continuity tester for 6, 12, 
and 34 volt systems. This self-powered electrical tester can 
be used to detect power, ground and find shorts and breaks 
in low voltage circuits. The handle will light up if the circuit 
is complete. If the handle fails to light up, the circuit is faulty.   
 

Unpacking  

 

After unpacking unit, inspect carefully for any damage that 
may have occurred during transit. Check for loose, missing, or damaged parts. Shipping damage claim must be filed 
with carrier. 

 

 

Specifications and Dimensions  

 

 

 

 

 

                 

    Voltage Protection

 Dimensions (Inch)

            Weight

Model        Display                       (Yes/No)                            Length     Diameter    Height            (Lbs)

 

1EKN5              Bulb                                No                                 10.75”          N/A            1.5”               0.221LBS 

 

 

Wear safety glasses and gloves 

that have heat protection.

 

 

Study, understand, and follow all 

instructions before using this tool.  Intended use 
is to detect power, ground, and find shorts and 
breaks in low voltage electrical circuits.  No 
alterations of this product are allowed.  Do not 
use this tool for any purpose other than that for 
which it was intended.  Failure to heed any one or 
combination of these warnings may result in 
severe personal injury.   
 

 

Do not use to test spark plugs and 

systems with 110 volts or higher.

 

 

Types of Application 

 

Wiring, connectors, switches, and relays 

 

Fuses and fusible links 

 Circuit 

Breakers 

 Switches 

 Distributors 

 Junction 

Blocks 

 Armatures 

 Condensers 

 

Coils and diodes 

 Breaker 

points 

 Appliance 

cords 

 

Operation 

Before using this tool verify that the voltage does not 
exceed 110V or higher.  

 

1. 

Remove bulb tip by twisting and install 2 AA 
batteries (1.5V).  Tester is ready for use. 

2. 

Turn off power source on the item that is being 
tested. 

3. 

Attach the alligator clip securely to ground wire. 

LOCAL LIVE WIRE 

4. 

Use the probe to pierce the wire insulation.  If 
the tester lights up the wire is live. 

BROKEN WIRE 

5. 

Use the probe to pierce the wire insulation.  
Probe along the wire until tester fails to light up.  
This is where the circuit is broken. 

TEST FUSES 

6. 

 Use the probe to make contact with the fuse 
terminal closets to load.  If the tester lights up 
the fuse is good. 

TEST LIGHT SOCKETS 

7. 

Connect alligator clip to socket housing and use 
the probe to touch the base of the socket.  If 
tester lights up the circuit is good. 

 

 
 
 

THRXXX 
Printed in Taiwan 
08/07

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