Power Probe IV User Manual page 13

Power Probe IV
To test, first disconnect the device or load being operated from the circuit, then contact the probe tip
to the circuit being tested. Removing the component from the circuit prevents the component load
from affecting and altering the resistance reading.
For voltage drop testing the component must be connected and observe the difference between
battery voltage (BATT V) and tip voltage (TIP V)
If the circuit resistance is less than 10 Ohms the Red or Green LED will illuminate and the speaker will
make a corresponding tone if the speaker is on. Any differences between battery voltage and tip
voltage are easily observed.
PFT can also be used as an ohmmeter on wire or components not connected to battery power or
ground. Simply connect the item being tested between the probe tip and the auxiliary ground lead
and read the resistance reading in Ohms.
While it is possible to ohm check some components, it should be noted that PFT is primarily for use
on wiring only and should never be connected to a solid state component such as a module.
Testing and Measuring Operations
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Power Feed Testing
Remove component from
circuit before performing
Power Feed Test
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