Description
JDiag • Automotive electrical circuit tester P60
The JDiag P60 is a handheld circuit diagnostic tool designed for testing and repairing 6–30 V DC automotive electrical systems. It allows professional technicians and experienced DIYers to activate components such as fuel pumps, solenoids, cooling fans and headlights directly, plus detect voltage, test diodes, check continuity, identify ground faults and trace short circuits—all from one probe. With a measuring range of approximately 0.3 to 70 V, activation current up to 8 A, and a user-friendly LCD display with color-changing backlight for polarity indication, it simplifies complex electrical troubleshooting.
Key benefits
- Component activation mode provides positive or negative voltage output (up to 8 A) to test systems under load
- Voltage measurement from 0.3 to 70 V with clear LCD display and polarity feedback via backlight and audio cues
- Diode detection, continuity testing and ground identification to pinpoint wiring faults accurately
- Short-circuit tracing and fault location to reduce diagnostic time in complex wiring harnesses
- Designed for 6–30 V DC systems, covering a wide variety of vehicles including cars, trucks, motorcycles, boats, and more
Supported protocols
- DC voltage detection 6–30 V
- Voltage measurement 0.3–70 V
- Current output for activation 0–8 A
Supported functions
Depending on vehicle compatibility the following functions are supported:
- Activate components: fuel pumps, fans, relays, headlights
- Measure voltage and detect positive/negative polarity
- Test diode functionality
- Check continuity and verify circuit integrity
- Detect grounding and bad ground connections
- Trace and locate short circuits
Included items
- 1 × test probe tool P60
- 1 × user manual










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