Battery Saver

WARNING: This page is about a different car, the 2005 Ford Pickup, 2005 Ford F550 Super Duty, 2005 Ford F450 Super Duty, and 2005 Ford Cab & Chassis. However, it is still accessible from the selected car via links, so may be relevant.

The battery saver is activated when the instrument cluster is not receiving voltage input from the ignition switch (OFF position). The instrument cluster then provides ground to the battery saver relay coil, activating the relay, for a period of 10 minutes with the interior lamp (headlamp) switch in the OFF position, or a maximum period of 30 minutes with the interior lamp (headlamp) switch in the ON position, or a door is ajar, provided that the instrument cluster does not receive any other input signals within the time-out period. The activated battery saver relay switches voltage to the demand lamp circuit and the interior lamp relay coil. After time-out, the instrument cluster removes the ground from the battery saver relay coil, disabling the demand lamp circuit.