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Vedpak 132_501186_Version 4_12.2017
211097
TESTING TRAILER LIGHTS AND CONNECTIONS
1. Connect the tester to a good battery.
2. Clip the auxiliary ground clip to the trailer ground.
3. Probe the contacts at the jack and apply voltage to
them. 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 and
depressing the reset button until it clicks into place.
ACTIVATING ELECTRICAL COMPONENTS
IN THE VEHICLE
To activate components with positive (+) voltage:
Contact the probe tip to the positive terminal of the
component, the green negative sign “÷“ LED should light.
Indicating continuity to ground.
While observing the green indicator, quickly depress
and release the power switch forward (+). If the green
indicator went out and the red positive sign (+) LED came
on, you may proceed with further activation. If the green
indicator went off at that instant or if the circuit breaker
tripped, the tester has been overloaded. This could hap-
pen for the following reasons:
• The contact is a direct ground.
• The component is short-circuited.
• The component is a high current component
(i.e., starter motor).
If the circuit breaker tripped, reset it by allowing it to cool
down and then depress 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 correct schematic and diagnosing procedure while
testing.
Trick: When powering-up compo-
nents, you can increase the life of
your tester 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.
