Symptom Checks

Check the following items:

• If engine cannot be turned off, check for damaged ignition switch or short to power in IGN RUN circuit or VPWR circuit. See appropriate wiring diagram in appropriate article:

For 4.2L Van, see WIRING DIAGRAMS - 4.2L .

For 4.6L Van, see WIRING DIAGRAMS - 4.6L .

For 5.4L Van, see WIRING DIAGRAMS - 5.4L GASOLINE .

For 6.8L Van, see WIRING DIAGRAMS - 6.8L .

For 4.2L Pickup, see WIRING DIAGRAMS - 4.2L .

For 4.6L Pickup, see WIRING DIAGRAMS - 4.6L .

For 5.4L Pickup, see WIRING DIAGRAMS - 5.4L GASOLINE .

• Perform QUICK TEST. See appropriate article:

For 4.2L Van, see TESTS W/CODES - 4.2L .

For 4.6L Van, see TESTS W/CODES - 4.6L .

For 5.4L Van, see TESTS W/CODES - 5.4L GASOLINE .

For 6.8L Van, see TESTS W/CODES - 6.8L .

For 4.2L Pickup, see TESTS W/CODES - 4.2L .

For 4.6L Pickup, see TESTS W/CODES - 4.6L .

For 5.4L Pickup, see TESTS W/CODES - 5.4L GASOLINE .

If any DTCs are present, perform appropriate CIRCUIT TEST.