GODIAG GT101 4 in one DC 6-40V Circuit Tester Power Probe Relay Tester

The GT101 is a multi‑function automotive electrical tester designed to help diagnose and service 6 V–40 V DC vehicle electrical systems. It combines several tools into one, so you don’t need separate testers for basic electrical checks and component activation.

 Key Functions

• Circuit testing – Finds open circuits, short circuits, positive/negative polarity, and pulse currents in wiring and circuits.

• Power probe/circuit activation – Supplies controlled battery power (positive or negative) to components like motors, lamps, windows, etc., to check if they work.

• Fuel injector testing & cleaning – Tests injector electrical operation and supports cleaning work with adapters included.

• Relay testing – Checks automotive relays and continuity using supplied adapters and leads.