User Manual

11
3.5 Testing Trailer Lights and Connections
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 and depressing the reset button until it clicks into
Place.
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.
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.
 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.