Symptom Chart
Diagnostics in this article assume a certain skill level and knowledge of Ford-specific diagnostic practices. REFER to: Diagnostic Methods .
Symptom Chart
| Condition | Possible Sources | Actions |
|---|---|---|
| A module does not respond to the diagnostic scan tool | Fuse Wiring, terminals or connectors Module |
REFER to: Communications Network . |
| All the trailer lamps are inoperative | Refer to the Pinpoint Test | GO to Pinpoint Test A |
| The trailer stop/turn lamp is inoperative or always on | Refer to the Pinpoint Test | GO to Pinpoint Test B |
| The trailer parking lamps are inoperative or always on | Refer to the Pinpoint Test | GO to Pinpoint Test C |
| Trailer brake lamp fault message in the message center when no trailer is connected | Refer to the Pinpoint Test | GO to Pinpoint Test D |