JTC-6934 Cordless Circuit Tester

1. Outstanding Features

Bi-color LED and dual-tone buzzer can distinguish between positive and negative polarity voltage. No ground wire or clip required, making operation fast and tidy. V-Groove needle accessory makes piercing and carrying safe. Cordless design convenient for automotive circuit testing. Only for 3-30V DC Voltage, suitable for common automotive electrical systems.

 

2. Practical Applications

Quickly testing wire polarity in automotive circuits. Identifying positive and negative wires without ground clip. Testing circuits at connectors, fuses, relays and switches. Supporting circuit fault diagnosis on passenger cars and light trucks. Used in garages, service workshops and technician training. Suitable for quick checks when installing auxiliary electrical equipment.

 

3. How to Use

Step 1: Check that the V-Groove needle is firmly installed on the probe.

Step 2: Touch the needle tip to the point to be tested on the circuit.

Step 3: Observe the bi-color LED to determine polarity.

Step 4: Listen to the dual-tone buzzer to distinguish positive and negative.

Step 5: Move the needle to other points for continuous testing.

Step 6: Disconnect contact after testing is complete.

 

Step 7: Store the device with the needle protective cap when not in use.

 

4. Device Maintenance

Clean device body with soft damp cloth after each use. Do not immerse device in water or strong solvents. Check V-Groove needle periodically for bending or breakage. Replace needle when tip is worn or contact is poor. Store in dry place, avoid direct sunlight and high temperature. Do not use device outside 3-30V DC measurement range. Cover needle protective cap when carrying for safety.