Symptom Chart

WARNING: This page is about a different car, the 2013 Ford Mustang. However, it is still accessible from the selected car via links, so may be relevant.

Diagnostics in this service information assume a certain skill level and knowledge of Ford-specific diagnostic practices. Refer to DIAGNOSTIC METHODS for information about these practices.

SYMPTOM CHART

Condition	Possible Sources	Action
The courtesy lamp flashes on and off	Smart Junction Box (SJB) is not configured correctly	CONFIGURE the SJB. REFER to MODULE CONFIGURATION . TEST the system for normal operation.
The courtesy lamp does not turn on with a door open	Wiring, terminals or connectors Door ajar switch SJB	GO to PINPOINT TEST A .
The courtesy lamp is inoperative from the instrument panel dimmer switch	Wiring, terminals or connectors Instrument panel dimmer switch SJB	GO to PINPOINT TEST B .
The interior courtesy lamp is inoperative	Fuse Wiring, terminals or connectors Overhead console SJB	GO to PINPOINT TEST C .
The pony projection light(s) are inoperative	Wiring, terminals or connectors Exterior mirror	GO to PINPOINT TEST J .
The interior courtesy lamp stays on continuously	Wiring, terminals or connectors Door ajar switch Instrument panel dimmer switch SJB	GO to PINPOINT TEST D .
The pony projection lights stay on continuously	Wiring, terminals or connectors SJB	GO to PINPOINT TEST K .
One or more demand lamp is inoperative	Wiring, terminals or connectors Overhead console Sun visor (vanity mirror lamp) SJB	GO to PINPOINT TEST E .
The luggage compartment lamp is inoperative/always on	Wiring, terminals or connectors Luggage compartment lamp Luggage compartment lid latch SJB	GO to PINPOINT TEST F .
The battery saver does not deactivate after time-out	Wiring, terminals or connectors SJB	GO to PINPOINT TEST G .
The ambient lighting does not cycle through all color combinations (single LED or zone)	Wiring, terminals or connectors Ambient lighting harness Body Control Module B (BCM-B)	GO to PINPOINT TEST H .
An individual LED is inoperative	Wiring, terminals or connectors Ambient lighting harness	GO to PINPOINT TEST H .
The ambient lighting is inoperative	Wiring, terminals or connectors BCM-B	GO to PINPOINT TEST I .