Car Truck Voltage Circuit Tester Auto 6V 24V 36V Herramientas Tools Diagnostic Probe Test Pen Light Bulb Automobile Polarity Pen

Product features:
1. Sharp steel probes can easily pierce wire insulation to check circuits.
2. The probe pen is ideal for checking circuits, fuses, switches and wiring in cars, trailers, boats, motorcycles and other low voltage systems.
3. Ground the alligator clip and test the circuit with a probe. When the light is on, there is electricity.

Product instructions:
1. Clip the measured alligator clip to the ground wire (such as the metal or negative pole of the car)
2. Measure the conductive metal in the test circuit with the needle of the electric pen
3. If the light bulb of the stylus will light up, it means that the measured point has formed a circuit and works normally. On the contrary, there is a fault at the measured point, which is to be checked.