Autel PowerScan PS100 - Manual (Page 16)

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 The component is a very high current component(i.e., starter
motor).
If the circuit breaker is tripped, reset it by waiting for it to cool down
(15 sec.) and then depressing the reset button.
WARNING : Haphazardly applying voltage to certain circuits can
cause damage to a vehicle’s electronic components. Therefore, it is
strongly advised to use the vehicle manufacturer’s schematic and
diagnosing procedure while testing.
NOTE : When powering up components, you can increase the life
of power switch if you first press the switch, then contact the tip to
the component. The arcing will take place at the tip instead of the
contacts of the switch.
Figure 13
3.7 Activating Components w/Ground
While the tool in DC Voltage mode, contact the probe tip to the
negative terminal of the component, the red LED should light. While
observing the red LED, quickly depress and release the power switch
rearward. If the red LED went out and the green LED came on, you