Battery Saver - Ford 2003 Mustang Workshop Manual

SECTION 417-02: Interior Lighting
DIAGNOSIS AND TESTING
Interior Lighting
Refer to Wiring Diagrams Cell
connector information.
Refer to Wiring Diagrams Cell
information.
Refer to Wiring Diagrams Cell
Special Tool(s)
73 Digital Multimeter or
equivalent
105-R0051
Worldwide Diagnostic System
(WDS)
418-F224,
New Generation STAR (NGS)
Tester
418-F052, or equivalent scan
tool
Principles of Operation

Battery Saver

The battery saver feature provides automatic shut-off of power to demand and courtesy lamp circuitry.
When the generic electronic module (GEM) detects the ignition switch circuits are in the key OFF or
removed ignition key positions, power will be disabled after individual time-out periods of 30 minutes
for the demand lamps, and 10 minutes for the courtesy lamps. However, the time-out period for the
courtesy lamps changes to 30 minutes when the GEM detects that the luggage compartment lid is ajar
by means of the luggage compartment lid ajar circuit, or if the dome lamp is switched on by means of
the dome lamp circuit. When the GEM detects that the ignition switch is in the RUN, ACC, or START
positions, the battery saver feature is disabled.
The battery saver timer for the demand lamps is reset when the GEM detects that the ignition switch is
in the OFF or key out positions or when the GEM detects any one of the following conditions:
the driver or passenger door becomes ajar, as detected by the door ajar circuit
the luggage compartment lid becomes ajar, as detected by the luggage compartment lid ajar
circuit
the dome lamp switch is activated, as detected by the dome lamp switch circuit
The battery saver timer for the courtesy lamps is reset when the GEM detects that the ignition switch is
in the OFF or key out positions or when the GEM detects the driver or passenger door becomes ajar
111 , Remote Control Alarm and Lock System for schematic and
59 , Generic Electronic Module for schematic and connector
89 , Courtesy Lamps for schematic and connector information.
2003 Mustang Workshop Manual