Ignition Module Run Mode Test

Insert test adapter between wiring harness and ignition module 4-pin connector. See Fig 1. Connect a scope with an inductive pick-up to coil high tension wire. Turn ignition on and check for spark while repeatedly grounding test lead.

Fig 1: EEC Ignition System Test Adapter Hook-Up
Courtesy of FORD MOTOR CO.

Fig 2: Ignition Module Final Start Test Diagnostic Chart
Courtesy of FORD MOTOR CO.
If spark occurs, go to IGNITION MODULE START MODE TEST. If spark does not occur, turn ignition on and off and check for spark each time ignition is turned off. If spark occurs, go to next step. If not, to step 4.
Remove test adapter. Install a known good ignition module and attempt to start engine. If engine starts, install original module to verify that unit is faulty and then replace module. If engine starts with original module, repeat test procedure.
Turn ignition on. Compare battery voltage with voltage at Red wire. If voltage at Red wire does not equal battery voltage, repair Red wire and attempt to start engine. If voltage at Red wire is okay or if engine does not start, go to IGNITION MODULE FINAL TEST.