Test Light or Power Probe? Side by Side Comparison for Car Electrical Diagnosis

About this video

Circuit tester (test light) vs power probe, compared side by side. In this video we explain what a 12 volt circuit tester is, what a power probe is, how each tool works, and which one you should buy for automotive electrical diagnostics.

We show you how to use a test light to check for power and ground, and how a power probe goes further by letting you supply power or ground directly to a component, test circuits, activate relays, fuel pumps, cooling fans, and window motors, and troubleshoot wiring problems faster.