Trigger Check
- Disconnect ignition control module's 3-pin connector (black, orange and green wires). Install diagnostic test adapter (T79P-12127-A) between 3-pin module and harness connectors. See Fig 1.
Courtesy of FORD MOTOR CO.
NOTE: If adapter is not available, use jumper wires. Connect black and green wires to their mating harness wires. Attach jumper wire to orange module wire, but do not attach this wire to its mating harness wire. Leave it free for testing. - Remove coil high tension wire from distributor. Install spark tester on end of wire. Turn ignition switch to "RUN" position. Tap the adapter diagnostic lead wire (jumper wire to orange module wire) against battery positive terminal. A spark should occur at spark tester each time diagnostic lead touches battery.
- If spark results, ignition system is OK. Check other parts of EEC system. Then check fuel system. If no spark results, proceed to next test after reconnecting all vehicle wiring.