Where is the battery saver relay located in the 2003 ford f250?

The battery saver relay for the 2003 Ford F-250 is located on the left side of the fuse block in the driver's area. The Battery Saver Relay is controlled by the Generic Electronic Module. It depowers any courtesy lights that are accidentally left on after about a 10-minute delay with the key turned off. So the relay coil is only powered for those ten minutes after key shutoff. A bad battery saver relay can cause a voltage draw which would cause the battery to die after a day or so of sitting without the use. Since the battery saver circuit is designed to stay on for a while after the ignition key is shut off a dead battery is a common symptom.