Positive Lead | Measurement / Action | Negative Lead |
|---|---|---|
C205-3 | C205-6 |
Is the resistance greater than 10,000 ohms?
Yes | GO to A6 |
|---|---|
No | REPAIR the circuit in question. |
A6 CHECK THE INSTRUMENT PANEL DIMMER SWITCH
Perform the instrument panel dimmer switch component test (part of the headlamp switch component test). Refer to Wiring Diagrams Cell 149 for schematic and connector information.
Does the instrument panel dimmer switch pass the component test?
Yes | GO to A7 |
|---|---|
No | INSTALL a new headlamp switch. REFER to: Headlamp Switch (417-01 Exterior Lighting, Removal and Installation). |
A7 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 pushed-out pins — install new pins as necessary
Reconnect the BCM connectors. Make sure they seat and latch correctly. Operate the system and determine if the concern is still present.
Is the concern still present?
Yes | CHECK OASIS for any applicable Technical Service Bulletins (TSBs). If a TSB exists for thei concern, DISCONTINUE this test and FOLLOW the TSB instructions. If no TSB address this concern, Click here to access Guided Routine (BCM).. |
|---|---|
No | The system is operating correctly at this time. The concern may have been caused by module connections. ADDRESS the root cause of any connector or pin issues. |
All Non-Networked Illumination Is Inoperative
Refer to Wiring Diagrams Cell 71 for schematic and connector information.
Normal Operation and Fault Conditions
The dimmer switch is integral to the headlamp switch and provides a corresponding voltage signal to the BCM based on which switch is pressed (dim up or dim down).
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.