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16
9. TEST APPLICATIONS
9.4 ACTIVATING COMPONENTS IN YOUR HAND - FIG. 17
While the tool is in DC Voltage mode, by using the probe tip in connection with the auxiliary ground
lead, components can be activated right in your hand, thereby testing their functions.
Connect the auxiliary ground lead to the negative terminal or ground side of the component being
tested. Then contact the probe tip to the positive terminal of the component, the green LED should
light, indicating continuity through the component. While keeping an eye on the green LED, quickly
press and release the power switch forward. If the green LED went out and the red LED came on,
you may proceed with further activation. Rock the power switch forward and hold it down to
provide power to your component. With the power switch rocked forward, power will flow from the
positive lead on the battery into the probe tip, through the tip into the component’s positive
terminal, into the component and out of the component, through the auxiliary ground lead and back
into the tool, and back to the vehicle’s battery’s ground.
9.5 TESTING TRAILER LIGHTS AND
CONNECTIONS - FIG. 18
While the tool in DC Voltage mode, clip the auxiliary
ground lead to the trailer ground, probe the contacts at
the jack and then apply voltage to the probe tip. This
lets you check the function and orientation of the
connector and trailer lights.
If the circuit breaker tripped, that contact is likely a
ground. Reset the circuit breaker by letting it cool down
for 15 seconds.
• Press the power switch forward to activate the bulb.
• Contact the tip to the positive terminal of the bulb
• Connect the negative auxiliary clip.
If the green LED went off at that instant or if the circuit breaker
tripped and the tool has been overloaded. This could happen
for the following reasons:
• The contact you are probing is a direct ground or negative
voltage.
• The component you are testing is short-circuited.
• 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.)
FIG.17
FIG.18
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