Activating electrical components with negative (-) voltage
Contact the Testing Device’s tip to the negative terminal of the component, the LED indicator should light RED.
While keeping an eye on the red LED indicator, quickly depress and release the power switch rearward (-). If the red indicator
changed instantly from RED to GREEN you may proceed with further activation. If the green indicator went off at that instant or if
the circuit breaker tripped, the Testing Device Switch has been overloaded. This could have happened for the following reasons:
- The contact is a direct positive voltage.
- The component is short-circuited.
- The component is a high amperage component (i.e., starter motor).
If the circuit breaker tripped reset it by depressing the reset button.
Trick: When powering-up
components, you can
increase the life of your Testing
Device’s 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.
Depress the power
switch rearward to
ground the horn.
Activating electrical components with positive (+) voltage
To activate components with positive (+) voltage:
Contact the the Testing Device’s tip to the positive terminal of the component, the LED indicator should Light GREEN. While
keeping an eye on the green indicator, quickly depress and release the power switch forward (+). If the green indicator changed
instantly from GREEN to RED you may proceed with further activation. If the green indicator went off at that instant or if the
circuit breaker tripped, the the Testing Device’s has been overloaded. This could happen 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 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 correct schematic and diagnosing procedure while testing.
