US PRO 6789 Automotive Power Probe – 6–24V Digital Circuit Tester, 5 m Lead, 8A Protection

Cut diagnosis time on electrical faults. The US PRO 6789 connects to the vehicle battery and lets you power or ground a circuit at the probe tip with a simple rocker switch—perfect for fast checks of lights, motors, relays and wiring. Built-in short-circuit/overload protection (8A auto cut-off) safeguards the vehicle and the tool. Use the probe to trace and locate shorts, verify good/bad grounds, and perform quick continuity tests using the included auxiliary ground lead. The long 5-metre cable reaches front to back on most vehicles, making it a staple for auto electricians and DIYers.

Key features / specs

• Operating voltage: 6–24 V DC

• Functions: power feed (±), ground test, short tracing, continuity (aux ground lead)

• Protection: 8 A overload (auto disconnect)

• Lead length: 5 m cable with battery clamps

• Compliance: CE

• Brand: US PRO • Code: 6789

What’s included

• Automotive power probe unit

• 5 m power lead with battery clips

• Auxiliary ground lead

• Quick-start instructions

Usage tips

• Always confirm polarity before energising a circuit.

• Use the probe to load-test components (lamps, fans, pumps) briefly to confirm operation.

• When tracing shorts, work down the circuit in sections while monitoring protection trips.