Units With Integral Coil

Fig. 15 Testing integral ignition coil:

Ignition Coil Testing
1. Connect a suitable ohmmeter as shown in Fig. 1, step 1. Using the low scale, read ohmmeter. Should be near zero or zero. If not, replace coil.
2. Connect ohmmeter both ways as shown in Fig. 1, step 2. Using the high scale, read ohmmeter. If both readings are infinite, replace coil.

Fig. 16 Testing integral coil distributor pickup coil:

Pickup Coil Testing
1. Remove distributor rotor, then disconnect pickup coil leads from module.
2. Connect ohmmeter as shown in Fig. 2, step 1. Connect a suitable vacuum source to vacuum advance chamber (if equipped) and note ohmmeter reading throughout entire vacuum advance range. If no vacuum advance is used, flex leads by hand to check for opens. Ohmmeter should read infinite at all times. If not, pickup coil is defective and must be replaced.
3. Connect ohmmeter as shown in Fig. 2, step 2. Repeat step 2. Ohmmeter should read one steady value between 500-1500 ohms. If not, pickup coil is defective and must be replaced.

Note: Ohmmeter may deflect if vacuum advance range causes timing core teeth to align. This is not to be considered a defect.

Fig. 14 Testing Hall Effect switch:

Hall Effect Switch Testing (If Equipped)
1. Carefully noting polarity, connect battery and suitable voltmeter as shown in Fig. 3.
2. Voltmeter should read less than 0.5 volts. If not, replace Hall Effect switch.
3. Insert knife blade as shown in Fig. 3. Voltmeter should read within 0.5 volts of battery voltage. If not, replace Hall Effect switch.