Expedition 4WD V8-4.6L SOHC VIN W (1999)
Battery Saver Relay: Description and Operation
The following components are controlled by the battery saver relay:
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front map lamp assembly
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Front door courtesy lamp
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Generic electronic module (GEM)
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Glove box lamp assembly
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Central security module
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Interior lamps
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Under hood lamp
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Glove compartment lamp
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Interior lamp relay
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Accessory delay relay
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Illuminated vanity mirrors (Navigator only)
The battery saver relay becomes active (relay coil is energized) when the GEM is in the awake mode, or in the sleep mode, (relay coil is de-energized).