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Resettable protection: an 8-amp thermal circuit breaker with manual reset shields the tool and the vehicle’s wiring after an accidental short — let it cool about 15 seconds
Connect battery leads and verify circuit voltage
Red/green polarity LEDs and a toggleable audio tone confirm positive or ground and let you “listen” to sensor signals across a 10Hz–10kHz pass-through
000 points to the Power Probe Link app
Capture over time + MAX/MIN/AVG
Power Probe PP4 Automotive Circuit Testing Lighting Resettable protection: an 8-amp thermalWhat it is Power, ground and diagnostics. One probe. The Power Probe 4 (PP4) is the next generation of the Power Probe circuit tester the signature power and ground probe now loaded with multimeter functions, eight diagnostic modes and an easy to read colour LCD. Touch the tip to a circuit to apply battery voltage or ground through the 23 ft lead, read volts, resistance, frequency and pulse width on one screen, and pulse fuel injectors or test module