Ignition Module Start Mode Test EEC III Models Only
NOTE:
Perform Run Mode Test first, then perform this test, if necessary. Run Mode Test is found in Fig. 5.
- Connect an adapter between ignition module 3-wire connector and harness connector. See Fig. 6. If adapter is not available use jumper wires to connect green wire on ignition module to green wire on harness connector, black wire on ignition module to black wire on harness connector, and an orange wire connected to orange wire of ignition module connector, but not attached to harness connector orange wire. This orange lead is used as the diagnostic lead. See Fig. 6.
- Attach a modified spark plug to coil secondary wire. See Fig. 7. Turn ignition switch to "START" position and hold. Repeatedly touch the orange diagnostic wire to battery positive terminal and then remove it. Watch for a spark at modified spark plug every time diagnostic wire is touched to battery positive terminal.
- If a spark occurs, ignition module is OK. If no spark occurs, measure battery voltage and voltage of the white wire (do not disconnect 2-wire connector), while holding ignition switch in "START" position. Voltages should be within 1.0 volt of each other.
- If voltages are not the same, proceed to step 5). If voltages are the same, substitute a known good ignition module for testing. Repeat Start Mode Test, beginning at step 2). If modified spark plug does not spark, perform Ignition Module Run Mode Test. If modified spark plug sparks, proceed to step 6).
- Repair white wire, connectors of the wire feeding power to white wire (check ignition switch, starter solenoid, etc.). If modified spark plug sparks after repairs, ignition system is OK. If plug still fails to spark, substitute a known good ignition module and start testing from step 4).
- Reconnect original ignition module to make sure it is faulty. If modified spark plug sparks with old module, repeat tests, starting with Run Mode Test. If old module does not spark, install new ignition module.