Shenzhen IDUTEX Tech Co., Ltd
22
WARNING : With this function, if you are contacting a protected
circuit, a vehicle’s fuse can be blown or tripped if you apply ground
to it.
3.8 Checking for Bad Ground Contacts
Probe the suspected ground wire or contact with the probe tip.
Observe the blue LED. Depress the power switch forward then release. If
the blue LED went out and the red LED came on, this is
not a true ground..
If the circuit breaker tripped, this circuit is more than likely a good
ground. Keep in mind that high current components such as starter
motors will also trip the circuit breaker.
3.9 Following & Locating Short Circuits
In most cases a short circuit will appear by a fuse or a fusible link blowing
or an electrical protection device tripping (i.e., a circuit breaker). This is the
best place to begin the search.
Ɣ
Remove the blown fuse from the fuse box.
Ɣ
Use the probe tip to activate and energize each of the fuse
contacts. The contact which trips the circuit breaker is the
shorted circuit. Take note of this wire
ெ
s identification code or
color.
Ɣ
Follow the wire as far as you can along the wiring harness.