This is what a wire piercing probe looks like:

Wire Piercing Probe

This tool helps you to get to the signal (inside the wire) without damaging the wire itself or probing the front of the terminal (since probing the front of the terminal can damage it).

This tool is one of the best wire piercing tools that I've ever used (and I've used them all over the years). Here are the main reasons why:

  1. This tool has a long handle. This long handle comes in handy when the wire is hard to reach.
  2. Very sturdy tool.
  3. The tool will center the wire almost automatically as you turn the knob to pierce the wire.
  4. Bright green color that makes it almost impossible to lose it in the engine compartment.
  5. At the bottom of the page, I'll show you where you can buy them... since this is a tool that can not be bought at your local auto parts store.
Wire Piercing Probe

To use this wire piercing probe (Power Probe (PWPPPPP01) Piercing Probe), you need two other important accessories:

  1. You'll need an adaptor to fit it into multimeter's lead (number 2).
  2. You'll also need a multimeter Lead with female adaptors on both ends (number 3).

Below are the links where you can buy these tools online:

Wire Piercing Probe