Check Voltage Ratings: Before piercing any wire, ensure the circuit voltage is within the safety rating of both your test clip and multimeter.
Correct Connections: Always confirm your multimeter is set to the correct function and range (Volts, Amps, etc.) and that the test leads are plugged into the correct input jacks.
Step 1: Tool Setup and Meter Preparation
1)Connect the Leads: Plug the right-angle banana plugs of the test clips (the red and black leads) into your multimeter's input jacks.
1.The Black plug goes into the COM (Common) jack.
2.The Red plug goes into the VΩmA (Voltage/Resistance/Current) or a dedicated A (Amps) jack, depending on what you are measuring.
2) Select Function: Turn the multimeter dial to the appropriate setting (e.g., DC V for measuring vehicle sensor signals, or Amps if measuring current).
Step 2: Wire Piercing and Connection
1)Identify Target Wire: Locate the specific insulated wire you need to measure (e.g., a power wire or a data signal line in a vehicle harness).
2)Open and Position: Squeeze or slide the clip to open the jaws.
3)Place the Wire: Gently position the target wire into the U or V-shaped groove of the test clip's jaw. Ensure the wire is centered directly under the internal sharp point of the clip.
4)Pierce the Insulation: Slowly and steadily close or tighten the test clip.
1.The sharp needle/pin inside the clip will penetrate the outer insulation of the wire.
2.The electrical connection is established when the needle makes firm contact with the metal conductor inside the wire.
Secure Connection: The clamp should now be securely fixed to the wire, providing a stable, low-resistance connection for hands-free testing. *
Step 3: Measurement and Post-Test Care
1)Take the Reading: With the clip securely in place, you are free to observe the real-time voltage, current, or signal reading on your multimeter.
2)Remove the Clip: When the test is complete, gently open the clip and remove it from the wire.
3)Seal the Puncture: Inspect the wire. Due to the small size of the puncture, the insulation material often closes up. For long-term reliability, especially in environments exposed to moisture (like an engine bay), it is highly recommended to seal the tiny puncture hole. Use a small dab of liquid electrical tape or a piece of self-fusing silicone tape to ensure the wire's insulation integrity is fully restored.