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14-4
1---1~
BATTERY.
-
..!.
_ _
_.TO
GENERATOR
REGULATOR
STARTER RELAY
TO
IGNITION
COIL
STARTER
Red·Bive
Stripe
---AUTOMATIC
TRANSMISSION ONLY
STARTER
NEUTRAL SWITCH
CLOSED WITH SELECTOR IN
N
OR P
POSITION
(
Red·
Bive Stripe
---STARTER SWITCH
(ON IGNITION SWITCH)
TO BATTERY
TERMINAL
OF
GENERATOR
REGULA TOR
J
1 083 -C
FIG. 3-Starting Circuit
NOTE2
Connect a heavy jumper cable
from the battery terminal of the re-
lay to the starter terminal of the relay
(Fig.
4, connection No. 1).
NOTE 3-STARTER RELAY
TEST
Connect a jumper from the bat-
tery
terminal
of
the
relay to the
starter
(ignition)
switch terminal of
the relay
(Fig.
4, connection No. 2).
If
the
engine does not crank, the
starter relay probably is at fault.
NOTE 4-STARTER CONTROL
CIRCUIT TEST
On vehicles equipped with an au-
tomatic transmission, if the engine
cranks, connect a jumper from the
battery
terminal of the
relay
to
the
relay
side
of the neutral
start
switch.
(Fig.
4,
connection No. 3). If the
engine does not crank, the wiring be-
tween the neutral-start switch and the
relay
is at
fault. If
the
engine cranks,
connect
a jumper from the
battery
GROUP 14- STARTING SYSTEM
terminal of the relay to the starter
(ignition) switch side of the neutral-
start switch (Fig. 4, connection
No.
4). If
the engine does not crank, the
neutral-start switch is out of adjust-
ment or defective. If the
engine
cranks, check for voltage at the bat-
tery terminal of the starter
(ignition)
switch
wiring
harness connector wi!h
a
test light
or a voltmeter.
If voltage
is not available, the wiring
between
the battery terminal of the
starter re-
lay and
the
battery terminal of the
starter
(ignition)
switch is at
fault.
If
voltage is available, substitute an
ignition switch from stock. If the
en-
gine cranks, replace the ignition
switch. If the engine
still
will not
crank,
the
trouble
is in
the
wiring
or
connections
between the
ignition
switch and
the
starter-neutral switch.
STARTER CRANKS ENGINE
SLOWLY
Refer to Fig. 5 for
this
symptom.
I
•
•
1---1~
BATTERY. -
.l
.
....,
_
__,
•
• •
:
TO
~,
3
IGNITION
•
COIL
1•
~--~S~TA~R~T~ER~--~
I
--------AUTOMATIC
TRANSMISSION
STARTER NEUTRAL SWITCH
Red. Blue Stripe
(
------STARTER SWITCH
(ON
IGNITION
SWITCH)
TO BATTERY
FIG. 4-Starting Control
Circuit Tests
J 1084. F
ENGINE WILL CRANK AT
NORMAL SPEED BUT
WILL
NOT START
Refer
to Group 8 for this symp-
tom.
STARTER LOAD
TEST
Connect the test equipment as
shown in Fig. 6 Be sure that no cur-
rent is flowing through the ammeter
and
heavy-duty
carbon pile rheo-
stat
portion
of the circuit (rheostat
at
maximum
counterclockwise posi-
tion).
Crank
the
engine with the ignition
OFF,
and determine the exact read-
ing on
the
voltmeter.
This test is ac-
complished by disconnecting and
grounding
the high tension lead from
the spark
coil,
and by connecting a
jumper from the battery terminal of
the starter relay to the ignition switch
terminal
of
the relay.
Stop
cranking the
engine,
and re-
duce the resistance of the carbon pile
until the voltmeter indicates the same
reading as that obtained while the
starter cranked the engine. The am-
meter
will indicate the starter current
draw under
load.
STARTER NO-LOAD
TEST
The starter no-load test will un-
cover
such faults as open or shorted
windings, rubbing armature, and bent
armature
shaft. The starter can be
tested,
at no-load, on the test bench
only.
Make
the test connections as
shown
in Fig. 6. The starter will run
at
no-load.
Be
sure that no current is
flowing
through the ammeter (rheo-
stat at
maximum counterclockwise
position).
Determine the exact read-
ing on the voltmeter.
Disconnect
the starter from the
battery,
and reduce the resistance of
the rheostat
until
the
voltmeter indi-
cates
the same reading as that ob-
tained
while the starter was
running.
The
ammeter will indicate the starter
no-load
current draw.
ARMATURE OPEN
CIRCUIT
TEST---oN
TEST
BENCH
An open
circuit armature may
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