Autel PowerScan PS100 - Manual (Page 15)

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voltage to the probe tip. This lets you check the function and
orientation of the connector and trailer lights. (Figure 12)
If the circuit breaker tripped, that contact is likely a ground. Reset the
circuit breaker by letting it cool down for 15 seconds and depressing
the reset button until it clicks into place.
Figure 12
3.6 Activating Components in The Vehicle
While the tool in DC Voltage mode, contact the probe tip to the
positive terminal of the component, the green LED should light,
indicating continuity to ground. While observing the green LED,
quickly depress and release the power switch forward. If the green
LED went out and the red LED came on, you may proceed with
further activation. (Figure 13) If the green LED went off at that
instant or if the circuit breaker tripped, the tool has been overloaded.
This could happen for the following reasons:
 The contact you are probing is a direct ground.
 The component you are testing is short-circuited.