F 150 2WD Pickup V8-5.4L Prop SOHC VIN Z (1998)
Turn Signal Switch: Flow of Diagnosis
1. Verify the customer concern by operating the multi-function switch.
2. Visually inspect the following for obvious signs of mechanical and electrical damage:
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Damaged multi-function switch
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Damaged ignition switch
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Damaged ignition key
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Blown fuse(s)
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Damaged wiring harness
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Loose or corroded
3. If the concern remains after the inspection, connect the New Generation STAR (NGS) Tester to the data link connector (DLC) located beneath the
instrument panel and select the vehicle to be tested from the NGS menu. If the NGS does not communicate with the vehicle:
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check that the program card is properly installed.
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check the connections to the vehicle.
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check the ignition switch position.
4. If the NGS still does not communicate with the vehicle, refer to the New Generation STAR Tester manual.
5. Perform the DATA LINK DIAGNOSTIC TEST. If the NGS responds with:
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CKT914, CKT915 or CKT70 = ALL ECUS NO RESP/NOT EQUIP, Diagnose the GEM and related wiring.
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NO RESP/NOT EQUIP for GEM, go to Pinpoint Test E.
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SYSTEM PASSED, retrieve and record the continuous diagnostic trouble codes (DTCs), erase the continuous DTCs and perform self-test
diagnostics for the GEM.
6. If the DTCs retrieved are related to the concern, go to the GEM Diagnostic Trouble Code (DTC) Index to continue diagnostics.
7. If no DTCs related to the concern are retrieved, proceed to Symptom Chart to continue diagnostics.
