Merc-O-Tronics 98 - COIL GROUND TEST; Coil Ground Test Procedure

COIL
GROUND
TEST
SMALL
BLACK
TEST
LEAD
CONDENSER
CONDENSER
SINGLE RED
TEST LEAD
NOT USED
1.
2.
SMALL
RED
TEST LEAD
Figure
l0
Leave
small
black
test
lead connected
as
in
CoiI
Continuity
Test.
Remove small
red
test lead
from hieh
tension wire
and connect
it
to
ground
or
frame of stator
plate.
(See
wiring
hookup,
Fig. 10.)
Turn selector
switch
to
position
No.
3
and
read Scale
No.
3.
The
meter
pointer
hand must
be
on
the
"ZERO"
line
at
the
left.
Any
meter movement
to the
right
indicates
a
grounded
coil.
If
there is
a meter
pointer
hand
movement
to
the
right, in#cating
a
grounded
coil,
remove
the
breaker
point
terminal
screw
at
"X"
on
diagram
Fig.
10.
3.
4.
5.
6.
7.
Remove
primary
coil wire
at
this
point.
If
the
meter
needle
remains
to
the
right the
trouble
is elsewhere.
8.
Check
condenser
for
short
or
grounded breaker
points.
NOTE:
When
coils
are
permanently
grounded to
lamination
(i.e.,
Fair-
banks-Morse,
Bendix-Scintilla),
see
illustration
and similar
type Fig.
11,
it is not
possible to
check
for
ground.
This
type
of coil
must
indicate
a
ground
(movement
of
meter
pointer hand
to
full right).
NOTE:
When
coils
are
not
permanently
grounded
to
lamination'
it
is
possible
to
check
for
ground. This
type
of
coil
must
not indicate
any
movement
of
meter
pointer
hand.