When you are diagnosing circuits, the POWER PROBE 4 gives you the confidence to safely test circuits. We connected it to the driver output from the engine control unit. We saw there was good ground, however when using Driver Test Mode to reference the transistor in the circuit to ground. With 1 volt displayed we realize it’s a faulty Control Unit caused by a bad transistor. Once replaced, the display on the PP4 shows a green light and a 0.2 volt reading, showing a perfect tolerance. Using the Dr

🔧 How to use the Power Probe 4 Fuel Injector Test Mode 🚗⚡ Did you know the Power Probe 4 includes a built-in Fuel Injector Test Mode? It’s the perfect solution for diagnosing injector issues with speed and accuracy—demonstrated here on a Fiat 500 petrol engine by our go-to tech by Danny Sehmi. 👨‍🔬 Once you’re in Fuel Injector Mode, the Power Probe 4 gets straight to work. You’ll instantly see four live data points: ✔️ A pulse confirmation via LED ✔️ Injector on-time to measure duration ✔️ In