Figure 3-35. Ignition coil, installed view.

(1) A test ammeter is required as shown to give

accurate measurement.

(2) Close ignition switch and adjust voltage to 12

volts.

(3) Test ammeter should read 2 to 3 amperes.

(4) Remove connections and instruments used

for test wiring.

e. Primary Ignition Circuit Resistance Test. Con-

nect a voltmeter with a one volt scale in series with

the positive battery terminal and the coil primary

terminal opposite distributor primary terminal.

(1) Remove distributor cap (para 3-44) and rotate

engine to close breaker points in distributor.

(2) Turn ignition switch to ON position. Volt-

meter should not read more than 0.20 volts.

(3) Turn ignition switch to OFF position. Dis-

connect voltmeter leads from battery and coil. Con-

nect one voltmeter lead to coil primary connected to

distributor and ground the other to the distributor

housing.

(4) Turn ignition switch to ON position. Volt-

meter should read less than 0.10 volts.

(5) If readings exceed the values specified, re-

place ignition coil.

(6) Turn ignition switch to OFF position and

disconnect test circuit.

Figure 3-35. Ignition coil, installed view.

Figure 3-36. Ignition coil test wiring.

3-34