Merc-O-Tronics 98 - High Tension Leakage - Crack Test

HIGH TENSION
TEAKAGE
-
CRACK TEST
PROBE
TEST CORD
(RED)
AROUND
TERMINALS
PROBE
LEAI)
TEST
PROBE TEST
LEAD
SMALL
RED
TEST LEAD
l1
MOVE
OVER
WHEN
PROBING T'{IS
srDE
i
1
SECONOARY CONNECTION
_
CAN
BE BRASHOPPER
OR
HEAVY WIRE
SMALL BLACK
TEST LEAD
Figure 24
To
check
for
cracks
or
leakage
paths
ln ignition
distributor caps
or
distributor
rotors, clip
small red test lead to coil
primary
lead and
blaek
test lead
to coil
core,
as
shown in illustration
above.
A
used coil
is best
for
this
test,
sinee
the
coil
will be
used for inducing a
high
secondary
voltage. The
secondary
coil
terminal
must
have a brass or
copper lead
attached
so
that
it
will
extend fulty
into the distributor cap
spark
plug
Iead
wlre outlet
to
provide
the
spark for
thls test.
Turn selector
switch to
position
No.
1,
"Coil
Power Test"randturn"LO-III" current control
knob
to
the
"HI"
position.
Place test
probe
into
jack
in
tester and
pass
other
end of test
probe
over
area
around dlstributor contact
post.
If
there
is
a
crack
or
leakage
path,
it
will show
up
by
the
spark
following a
path
in the
cap
rather
than
sparking
directly
to the correct terminal. If the
spark
path
occure,
the
cap ls defective and must be replaced. There
ehould be
no
Bpark
jump
to any
other
distributorpostother
than the one
being
tested.
Repeat
procedure
on
each
contact
post
of distributor cap.
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