Ford COUGAR 1968 Shop Manual page 432

9-1 2
GROUP 9
-,Ignition System
SHORTING PATTERN
I
-
NO.
1 CYLINDER
TEST
CYLINDER SHORTED
B
3103-A
FIG. 9
-
Dynamic Compression
Pattern
following the procedure under Clean-
ing and Inspection (Section 3 of this
part).
Check the coil on a coil tester
by following the manufacturers in-
structions. Check for excessive re-
sistance on both the primary and
secondary windings. Also check the
amperage draw both with the engine
idling and stopped. These checks
should all fall within specifications.
S E C O N D A R Y ( H I G H T E N S I O N )
W I R E S RESISTANCE TEST
The secondary wires include the
wires connecting the distributor cap
to the spark plugs and the wire con-
necting the center terminal of the
distributor cap to the center terminal
of the ignition coil.
-
Rotunda RE- 1631 or
A
RE-27-44 Tester
Red
FIG. 70
-
Battery to Coil and
Starting lgnition Circuit Test
B
ACCES~ORY
TERMINAL
Red-
FIG. I 7
-
lgnition Switch Test
Clean and inspect the secondary
wiring by following the procedure
under Cleaning and Inspection (Sec-
'
tion 3 of this part).
These wires are the radio resist-
ance-type which filter out the high
frequency electrical impulses that
are the source of ignition noise in-
terference. The resistance of each
wire should not exceed 1000 ohms
per inch.
When checking the resist-
ance of the wires or setting, ignition
timing, do not puncture the !ires
with a probe. The probe may cause
DISTRIBUTOR
d
FIG.
7 2
-
Resistance Wire Test
Rotunda
RE- 27.
FIG.
73
-
Coil t o Ground Test
a separation i n the conductor.
When removing. the wires from
the spark plugs grasp and twist the
moulded cap, then pull the cap off
the spark plug. D o not pull on the
wire because the wire connection in-
side the cap may become separated
or the insulator may be damaged.
T o check the spark intensity at the
spark plugs, proceed as follows:
1. Disconnect a spark plug wire.
Check the spark intensity of one wire
at a time.
2. Install a terminal adapter in the
terminal 'of the wire to be checked.