Thinkcar ACT20 Automotive Circuit Tester – 12V/24V Power Probe, Electrical System & Component Tester

Designed for 12V and 24V automotive electrical systems, the ACT20 combines voltage, current, and resistance measurement with polarity testing, continuity testing, ground testing, short-circuit troubleshooting, and direct component activation. Technicians can quickly identify positive, negative, and open circuits, check questionable grounds, test switches, relays and diodes, and apply power or ground directly through the probe to activate supported electrical components. A built-in 1.77-inch display provides easy-to-read measurements, while an integrated flashlight helps illuminate dark engine compartments, fuse panels, dashboards, and other difficult-to-see areas.