Condition | Possible Sources | Actions |
|---|---|---|
Module | ||
The turn signal function is inoperative or always on | Refer to the Pinpoint Test | GO to Pinpoint Test A |
One turn signal lamp is inoperative or always on - except China | Refer to the Pinpoint Test | GO to Pinpoint Test B |
One turn signal lamp is inoperative or always on - China only | Refer to the Pinpoint Test | GO to Pinpoint Test C |
The hazard lamp function is inoperative or always on | Refer to the Pinpoint Test | GO to Pinpoint Test D |
Pinpoint Tests
The Turn Signal Function Is Inoperative Or Always On
Refer to Wiring Diagrams Cell 90 for schematic and connector information.
Normal Operation and Fault Conditions
REFER to: Exterior Lighting - System Operation and Component Description (417-01 Exterior Lighting, Description and Operation).
Possible Sources
LH Multifunction switch SCCM BCM
PINPOINT TEST A : THE TURN SIGNAL FUNCTION IS INOPERATIVE OR ALWAYS ON
A1 CHECK THE SCCM (STEERING COLUMN CONTROL MODULE) TURN SIGNAL PARAMETER IDENTIFICATIONS (PIDS)
Ignition ON. Using a diagnostic scan tool, view SCCM Parameter Identifications (PIDs). Monitor the Turn signal Left Switch Input Status (TRN_SIG_SW_L) and Turn signal Right Switch Input Status (TRN_SIG_SW_R) while placing the LH steering column multifunction switch in the left and right turn positions.
Do the Parameter Identifications (PIDs) match the LH steering column multifunction switch position?
Yes | GO to A2 |
|---|---|
No | INSTALL a new LH steering column multifunction switch. REFER to: Steering Column Multifunction Switch LH (211-05 Steering Wheel and Column Electrical Components, Removal and Installation). TEST the system for normal operation. If the concern is still present, GO to A3 |
A2 CHECK FOR CORRECT BCM (BODY CONTROL MODULE) OPERATION
Disconnect and inspect all BCM connectors. Repair:
corrosion (install new connector or terminals – clean module pins) damaged or bent pins – install new terminals/pins
2016 Mustang workshop publication supplied to Mustang Atlas. Original technical text and illustrations; HTML formatting by Mustang Atlas. Source page numbering is retained for traceability. Follow the configuration, revision, warnings, and cross-references in the material. About this edition.