Actron Sunpro CP7673 - Ignition Resistor Circuit Test

10. IGNITION RESISTOR CIRCUIT TEST
OHM ae
EA HIGH AMP i
č
VOLTS
se
ay
`
%,
Low | DWELL y,
SS ES
F
RPM
NO CONNECTION NECESSARY
PE SANE PAE
A.
Turn
test
selector
to
the
VOLTS
position
and
put
the
range
switch
in
the
LOW
position.
B.
Connect
the
RED
test
clip
to
the
positive
(+)
battery
terminat
and
the
BLACK
test clip
to the “BAT”
(+)
terminal
of the
ignition
coil.
C.
With
engine
stopped,
connect
a
jumper
wire
from
the
DIST
(-)
terminal
of
the
ignition
coil
to ground.
D.
Turn
ignition
switch
to
the
ON
position
and
observe
the
HIGH
VOLTS
scale.
RESULTS:
VOLTAGE
READING
ABOVE
7.5
VOLTS
—
Defective
ballast
resistor
or
primary
resistance
wire,
defective
ignition switch,
loose or
corroded
connections.
VOLTAGE
READING
BETWEEN
4.5
AND
7.5
VOLTS
—
Resistor,
ignition switch,
wiring
and
connections
are
OK.
NOTE:
A
few
ignition
systems
use
an
internal
resistor
within
the
ignition
coil.
This condition is indicated by a near-zero volt reading. Refer to your vehicie’s
service manual for this information.
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