Symptom Chart

WARNING: This page is about a different car, the 2005 Ford Mustang. However, it is still accessible from the selected car via links, so may be relevant.

SYMPTOM CHART

Condition	Possible Sources	Action
The courtesy lamps are inoperative	Fuse(s). Circuitry open/shorted. Door ajar switch. Lamp. Smart junction box (SJB).	GO to PINPOINT TEST A .
The demand lamps are inoperative	Fuse(s). Circuitry open. Lamp.	GO to PINPOINT TEST B .
The interior lamps are inoperative using the dimmer control	Circuitry open. Dimmer control. Smart junction box (SJB).	GO to PINPOINT TEST C .
The interior lamps stay ON continuously	Door ajar switch. Dimmer control. Circuitry open/shorted. Smart junction box (SJB).	GO to PINPOINT TEST D .
The trunk lamp is inoperative	Circuitry open/shorted. Lamp. Decklid ajar switch. Smart junction box (SJB).	GO to PINPOINT TEST E .
The trunk lamp stays ON continuously	Circuitry open/shorted. Decklid ajar switch. Smart junction box (SJB).	GO to PINPOINT TEST F .
The illuminated entry is inoperative when using the remote keyless entry (RKE) transmitter/keyless entry keypad	Smart junction box (SJB).	GO to PINPOINT TEST G .