Sealey PPLK - Manual (Page 2)

3.3 PoLarity testinG. (see fig.3)
contacting the tip of the probe to a positive (+) circuit
will light the LED indicator rED. contacting the tip of
the probe to a negative (-) circuit will light the LED
indicator GrEEn. contacting the tip of the probe to
an open circuit will be indicated by the fact that the
LED indicator is off.
fig.3
3.4 continuity testinG. (see fig.4)
By using the probe tip together with the auxiliary
ground lead, continuity can be tested on wires and
components which are disconnected from the vehicle’s
electrical system.
3.4.1 When continuity is present, the LED indicator will light
GrEEn. note: Do not press the power switch.
fig.4
3.6 activatinG coMPonents reMoveD froM
tHe veHicLes eLectricaL systeM. (such as
fuel pumps, starter solenoids, magnetic clutches,
blower motors, cooling fans, lights etc.) see fig.5.
By using the probe tip together with the auxiliary
ground lead, components can be activated, thereby
testing their function.
3.6.1 connect the auxiliary ground lead’s clip to the
negative terminal of the component to be tested.
contact the probe to the positive terminal of the
component. the LED indicator should light GrEEn
indicating continuity through the component.
3.6.2 Whilst keeping an eye on the green illuminated LED,
quickly rock the power switch forwards to the single
bar position and release it. if the green indicator
changes instantly from GrEEn to rED, you may
proceed with further activation.
3.6.3 if the green indicator went off at that instant or if the
unit sounds, the unit has been overloaded. this could
happen for the following reasons.
a) Where the tip of the tester has contacted is a direct
ground or a negative voltage.
b) the component is short circuited.
c) the component requires a high amperage (e.g. a
starter motor).
note: When the unit sounds, a circuit breaker within
the unit will trip. this breaker will reset
automatically within 3 to 5 seconds.
fig.5
3.10 testinG traiLer LaMPs anD connections
3.10.1 connect the unit to a battery of the correct voltage.
3.10.2 Attach the auxiliary ground lead to the trailer ground.
3.10.3 Probe the contacts of the towing electrical connector
whilst rocking the power switch to the forward single
bar position. this lets you check the function and
orientaion of the trailer lights. (see fig.9).
fig.9
3.8 activatinG coMPonents WitH a Positive
(+) voLtaGe WitHin tHe veHicLe’s
eLectricaL systeM (see fig.7).
3.8.1 contact the probe tip to the positive terminal of the
component, the LED indicator should light GrEEn.
Whilst keeping an eye on the green indicator, quickly
rock the power switch forwards to the single bar
position and release it. if the green indicator changes
instantly from GrEEn to rED, you may proceed
with further activation.
3.8.2 if the green indicator went off at that instant or if the
unit sounds, the unit has been overloaded. this could
happen for the following reasons.
a) Where the tip of the tester has contacted is a
direct ground or a negative voltage.
b) the component is short circuited.
c) the component requires a high amperage (e.g. a
starter motor).
WarninG!
Haphazardly applying voltage to certain circuits
can cause damage to a vehicles electronic
components. therefore it is strongly advised to
use the correct wiring diagram and diagnosing
procedure whilst performimng tests.
fig.7
3.9 activatinG coMPonents WitH a neGative
(-) voLtaGe WitHin tHe veHicLe’s
eLectricaL systeM (see fig.8).
3.9.1 contact the probe tip to the negaitive terminal of the
component, the LED indicator should light rED.
Whilst keeping an eye on the red indicator, quickly
rock the power switch backwards to the double bar
position and release it. if the red indicator changes
instantly from rED to GrEEn, you may proceed
with further activation.
3.9.2 if the red indicator went off at that instant or if the
unit sounds, the unit has been overloaded. this could
happen for the following reasons.
a) Where the tip of the tester has contacted is a
direct positive voltage.
b) the component is short circuited.
c) the component requires a high amperage (e.g. a
starter motor).
WarninG! With this function a vehicle’s fuse can
be blown or tripped if grounding the contact is in
series with it.
fig.8
3.7 JuMPer LeaD feature (see fig.6).
3.7.1 the black clamp and the auxiliary ground lead are
connected through the unit. By leaving the red clip
disconnected from the vehicles battery, the unit can be
used as a long jumper lead.
3.7.2 Be careful to avoid short circuits and overloading
when using this jumper function. in this
congiguration the leads are not protected by the
units circuit breaker.
fig.6
3.5.3 Locate the colour coded wire in the harness and
expose it.
3.5.4 Probe through the insulation of the wire with the probe
tip and move the power switch to the forward, single bar
position to energise the wire. if the LED indicator turns
off or the unit sounds you have identified the shorted
wire.
3.5.5 continue testing the wire at each connector in the
harness. the wire which causes the LED indicator to
turn off or causes the unit to sound will lead you to the
shorted area. inspect the harness for signs of chafing or
burnt out wiring and replace or repair as necessary.
3.5 foLLoWinG anD LocatinG sHort circuits:
in most cases a short circuit causes a fuse to blow or a
circuit breaker to trip and this is the best place to begin
the fault tracing process.
3.5.1 remove the blown fuse from the fuse box. Hold the
probe tip against each of the contacts in turn whilst
moving the power switch to the forward, single bar
position. the side which causes the LED indicator to
turn off or causes the unit to sound is the shorted circuit.
3.5.2 note this wire’s identification code or colour. follow the
wire as far as you can along the wiring harness.
PPLK issuE no: 2 - 14/01/09 PPLK issuE no: 2 - 14/01/09