Ford COUGAR 1968 Shop Manual page 609

PART 14- 1
-
General Starting System Service
14-3
crank, the neutral-start switch is out
of adjustment or defective. If the
engine cranks, check for voltage at
the battery terminal of the starter
(ignition) switch wiring harness con-
nector with a test light or a volt-
meter. If voltage is not available,
the wiring between the battery ter-
minal of the starter relay and the
battery terminal of the starter (ig-
I
-TO
ALTERNATOR OUTPUT
STARTER RELAY
&(--------AUTOMATIC TRANSMISSION
STARTER NEUTRAL SWITCH
R e d - B l u e
S t r i p e
-
-
- -
STARTER SWITCH
(ON IGNITION SWITCH)
+
TO BATTERY
FIG.
3-Starting Control Circuit
Tests
nition) switch is at fault. If volt-
age is available, substitute an igni-
tion 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.
CHECK ENGINE
Remove the spark plugs. Remove
the coil high tension lead wire at the
distributor and ground it to the en-
gine. Try to crank the engine with
the starter. If the engine cranks, it
indicates that water is leaking into
the cylinders.
With the spark plugs removed and
coil to distributor high tension lead
grounded to the engine, attempt to
crank the engine with the starter. If
the engine does not crank or cranks
very slowly, a seized engine is
indicated.
E N G I N E C R A N K S SLOWLY
BUT WlLL N O T START
Refer to Fig. 9 for this symptom.
Make the following checks as cover-
ed under Starter Will Not Crank
The Engine: Check Battery, Check
Cables, Check Starter Drive and
Starter. In addition make the lollow-
ing checks:
Examine the dipstick for con-
gealed engine oil. Check the car
owner regarding the viscosity and
grade of oil in the crankcase. Drain
the crankcase and install the proper
viscosity engine oil. Change the oil
filter if required.
Check for partially seized pistons
CARBON PI L E RHEOSTAT
VOLTMmR A
1
TO OTHER CIRCUITS
TO IGNITION
TO BATTERY STARTER
or bearings. Remove the oil pan.
Check for water in the lubrication
system. If water is found, remove the
cylinder head and check for'combus-
tion chamber leaks. Check for seized
pistons, rings and bearings. Clean,
repair or replace defective or dam-
aged engine components.
E N G I N E WlLL C R A N K A T
N O R M A L SPEED BUT WlLL
N O T START
Refer to Group 8 for this symptom.
STARTER LOAD TEST
Connect the test equipment as
shown in Fig. 4. Be sure that no cur-
rent is flowing through the ammeter
and heavy-duty carbon pile rheostat
portion of the circuit (rheostat at
maximum counterclockwise position).
Crank the engine with the igni-
tion OFF, and determine the exact
reading on the voltmeter. This test is
accomplished by disconnecting and
grounding the high tension lead from
the ignition 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
reduce the resistance of the ,carbon
pile until the voltmeter indicates the
same reading as that obtained while
the starter cranked the engine. The
ammeter will indicate the starter cur-
rent draw under load.
STARTER N O - L O A D TEST
The starter no-load test will un-
cover such faults as open o r shorted
FIG.
4-Starter Load Test