Chevrolet Corvette 1963 Repair & Tune-Up Manual page 303

282 TROUBLESHOOTING
Test and Procedure
3.4—On point-type ignition systems,
connect a dwell-meter between
the distributor primary lead and
ground. Crank the engine and ob-
serve the point dwell angle. On
electronic ignition systems, con-
duct a stator (magnetic pickup as-
sembly) test. See Chapter 3.
CLOSE
3.5—On the point-type ignition systems,
check the condenser for short:
connect an ohmeter across the
condenser body and the pigtail
lead.
Checking the condenser for short
3.6—Test the coil primary resistance:
On point-type ignition systems,
connect an ohmmeter across the
coil primary terminals, and read
the resistance on the low scale.
Note whether an external ballast
resistor or resistance wire is used.
On electronic ignition systems,
test the coil primary resistance
as in Chapter 3.
Check the coll primary resistance
Results and Indications
On point-type systems, adjust the dwell angle
if necessary. NOTE: Increasing the point gap
decreases the dwell angle and vice-versa.
If the dwell meter shows little or no reading;
On electronic ignition systems, if the stator is
bad, replace the 'stator. If the stator is good,
proceed to the other tests in Chapter 3.
WIDE GAP
SMALL
DWELL
INSUFFICIENT
DWELL
Dwell Is a function of point gap
If any reading other than infinite is noted,
replace the condenser
Point-type ignition coils utilizing ballast re-
sistors or resistance wires should have ap-
proximately 1.0 ohms resistance. Coils
with internal resistors should have approx-
imately 4.0 ohms resistance. If values far
from the above are noted, replace the coil.
Proceed
to "•!
3.6 3.5
NARROW GAP
LARGE
DWELL
3.6
4.1