211083
11
Vedpak 104GB_Version 2_040909
GB
HeCkINg fOR bAD gROUND CONTACTs
Probe the suspected ground wire or contact with
the probe tip.
Observe the green LED indicator.
Depress the power switch forward then release.
If the LED indicator changed from GREEN to
RED, this is not a true ground.
If the circuit breaker tripped, this circuit is more
than likely a direct ground. Keep in mind that high
current components such as starter motors will
also trip the circuit breaker.
fOllOWINg AND lOCATINg sHORT
CIRCUITs
In most cases a short circuit will appear by a fuse
or a fusible link blowing or a protection device
tripping (i.e., a circuit breaker). Here is the best
place to begin the search.
Remove the blown fuse from the fuse box. Use
the testers tip to energize each of both contacts
in the fuse box. The side which trips the tester
circuit breaker is the shorted circuit. Take note of
this wire’s identification code or color. Follow the
wire as far as you can along the wiring harness,
for instance if you are following a short in the
brake light circuit you may know that the
wire must pass though the wiring harness at
the door sill. Locate the color-coded wire in
the harness and expose it. Probe through the
insulation of the wire with the tester tip and
depress the power switch forward to energize the
wire. If the tester circuit breaker tripped you have
verified the shorted wire.
Cut the wire and energize each end with the
tester tip. The wire which trips the tester circuit
breaker again will lead you to the shorted area.
Follow the wire in the shorted direction and
repeat this process until the short is located.
