Primary Circuit Test

Fig. 2 Primary circuit test connections with external IC unit.:

1. Disconnect harness from IC unit and connect voltmeter as shown in Fig. 2.
2. Turn ignition switch to on position. Meter should read 11.5-12.5 volts.
3. If reading is less than 11.5 volts, and all primary wiring has continuity, test coil primary winding.