Sealey PPVT - Manual (Page 3)

3.9 activatinG components WitH a neGative
(-) voLtaGe WitHin tHe veHicLe’s
eLectricaL system (fig.9).
3.9.1 set the selection switch to ‘tEst’ position.
3.9.2 contact the probe tip to the negative terminal of the
component, the test indicator should illuminate rED.
Whilst observing the test indicator, quickly press the
power switch to the double bar ‘nEGAtiVE’ position
and release it. if the indicator changes instantly from
rED to GrEEn, you may proceed with further
activation.
3.9.3 if the indicator went off instantly, 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 has a short circuit.
c) the component is a high current component
(e.g. a starter motor).
WarninG! With this function a vehicle’s fuses
may blow when the probe tip is earthed in series
with them.
3.7 Jumper LeaD feature (fig.7).
3.7.1 set the selection switch to ‘tEst’ position.
3.7.2 the black battery clip and the auxiliary earth lead are
connected directly through the unit. By leaving the red
battery clip disconnected from the vehicle’s battery, the
unit can be used as a long jumper lead.
3.7.3 Be careful to avoid a short circuit and overloading when
using this jumper function. in this configuration, the
leads are not protected by the unit’s built in circuit
breaker.
fig.7
3.8 activatinG components WitH a positive (+)
voLtaGe WitHin tHe veHicLe’s eLectricaL
system (fig.8).
3.8.1 set the selection switch to ‘tEst’ position.
3.8.2 contact the probe tip to the positive terminal, the test
indicator should illuminate GrEEn. Whilst observing
the test indicator, quickly press and release the power
switch to the single bar ‘PositiVE’ position.
3.8.3 if the test indicator went off instantly, the unit has
been overloaded. this could happen for the following
reasons:
a) the tip’s contact went to direct earth.
b) the component has a short circuit.
c) the component is a high current component (i.e.
starter motor)
WarninG! randomly applying voltage to certain
circuits can cause damage to a vehicle’s electronic
components. it is strongly advised to use the
correct circuit diagram and diagnostic procedures
whilst performing this test.
fig.8
fig.9
3.10 cHecKinG for baD eartH contacts (fig.10).
3.10.1 set the selection switch to ‘tEst’ position.
3.10.2 Probe the suspected earth wire or contact with the probe
tip. observe the colour of the test indicator.
3.10.3 Press the power switch to the single bar ‘PositiVE’
position and release it. if the test indicator changes from
GrEEn to rED, this is not a true earth.
3.10.4 if the test indicator turned off when the power switch
was pressed to the single bar position, this circuit is
more than likely a direct earth. note that high current
components such as a starter motor will also cause
the test indicator to turn off during this check.
fig.10
Original Language Version
PPVt issue: 1 - 13/05/11