Description | Fault Trigger Conditions |
|---|---|
Switch: Circuit Short To Ground detects a short to ground on the rear fog lamp on input circuit. | |
B1A79:15 Rear Fog Lamp: Circuit Short To Battery or Open | A continuous memory and on-demand DTC that sets when the BCM detects an open or short to voltage from the rear fog lamp output circuit. |
DTC
Possible Sources
Wiring, terminals or connectors Headlamp switch BCM
Visual Inspection and Diagnostic Pre-checks
Inspect the headlamp switch for damage.
PINPOINT TEST E : THE REAR FOG LAMP IS ON CONTINUOUSLY - CHINA ONLY
E1 CHECK THE HEADLAMP SWITCH
Ignition OFF. Disconnect: Headlamp Switch C205. Carry out the headlamp switch component test. Refer to Wiring Diagrams Cell 149 for schematic and connector information.
Does the headlamp switch pass the component test?
Yes | GO to E2 |
|---|---|
No | INSTALL a new headlamp switch. REFER to: Headlamp Switch (417-01 Exterior Lighting, Removal and Installation). |
E2 CHECK THE FOG LAMP SWITCH CIRCUIT FOR A SHORT TO GROUND
Disconnect: BCM C2280B. Measure:
Click to display connectors
Positive Lead | Measurement / Action | Negative Lead |
|---|---|---|
C205-2 | Ground |
Is the resistance greater than 10,000 ohms?
Yes | GO to E3 |
|---|---|
No | REPAIR the circuit. |
E3 CHECK THE FOG LAMP VOLTAGE SUPPLY CIRCUIT FOR A SHORT TO VOLTAGE
Ignition OFF. Disconnect: BCM C2280C. Ignition ON.
Does the rear fog lamp continue to illuminate?
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.