Symptom Chart: Turn Signal and Hazard Lamps
WARNING: This page is about a different car, the 2018 Ford F-550 Super Duty, 2018 Ford F-450 Super Duty, 2018 Ford F-350 Super Duty, and 2018 Ford F-250 Super Duty. However, it is still accessible from the selected car via links, so may be relevant.
Diagnostics in this article assume a certain skill level and knowledge of Ford-specific diagnostic practices. Refer to: Diagnostic Methods .
| Condition | Possible Sources | Actions |
|---|---|---|
| A module does not respond to the diagnostic scan tool | Fuse Wiring, terminals or connectors Module |
REFER to: Communications Network . |
| The turn signal does not cancel and the LH steering column multifunction switch does not return to the neutral position | LH steering column multifunction switch Clockspring (vehicles without adaptive steering) SCCM (vehicles with adaptive steering) |
INSTALL a new LH steering column multifunction switch. Refer to: Steering Column Multifunction Switch LH
. TEST the system for normal operation. If the condition is still present, For vehicles without adaptive steering, INSTALL a new clockspring. Refer to: Clockspring . For vehicles with adaptive steering, INSTALL a new SCCM. Refer to: Steering Column Control Module (SCCM) - Vehicles With: Adaptive Steering . |
| The turn signal function is inoperative or always on | Refer to the Pinpoint Test | GO to Pinpoint Test A |
| One front turn signal lamp is inoperative or always on - halogen headlamps | Refer to the Pinpoint Test | GO to Pinpoint Test B |
| One front turn signal lamp is inoperative or always on - LED headlamps | Refer to the Pinpoint Test | GO to Pinpoint Test C |
| One rear turn signal lamp is inoperative or always on - vehicles without a pickup bed | Refer to the Pinpoint Test | If the stoplamp is also inoperative, diagnose the inoperative stoplamp. Refer to: Stoplamps . If the stoplamp operates correctly, Refer to BCM Hardware Testing . |
| One rear upper turn signal lamp is inoperative or always on - incandescent rear lamps | Refer to the Pinpoint Test | If the stoplamp is also inoperative, diagnose the inoperative stoplamp. Refer to: Stoplamps . If the stoplamp operates correctly, Refer to BCM Hardware Testing . |
| One rear lower turn signal lamp is inoperative or always on - incandescent rear lamps | Refer to the Pinpoint Test | If the stoplamp is also inoperative, diagnose the inoperative stoplamp. Refer to: Stoplamps . If the stoplamp operates correctly, CLEAR the Diagnostic Trouble Codes (DTCs). REPEAT the self-test. If the turn signal lamp is still inoperative, INSTALL a new BCMB. |
| One rear turn signal lamp is inoperative or always on - LED rear lamps | Refer to the Pinpoint Test | If the stoplamp is also inoperative, diagnose the inoperative stoplamp. Refer to: Stoplamps . If the stoplamp operates correctly, INSTALL a new REFER to: Rear Lamp Assembly . If the turn signal lamp is still inoperative, Refer to BCM Hardware Testing . |
| One exterior mirror turn signal lamp is inoperative or always on | Refer to the Pinpoint Test | GO to Pinpoint Test D |
| The hazard lamp function is inoperative or always on | Refer to the Pinpoint Test | GO to Pinpoint Test E |
| The turn signal indicator flashes fast when no turn signal lamps are inoperative or does not flash fast when a turn signal lamp is inoperative - LED headlamps or LED rear lamps | Refer to the Pinpoint Test | GO to Pinpoint Test F |
| The turn signal indicator flashes fast when no turn signal lamps are inoperative - halogen headlamps turn signal lamp | Refer to the Pinpoint Test | GO to Pinpoint Test G |