F 150 4WD Pickup V8-281 4.6L VIN W EFI (1997)
Central Timer Module Inputs/Outputs
CHIMES
The Generic Electronic Module (GEM) and Central Timer Module (CTM) control the following warnings and chimes:
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Driver safety belt not fastened (warning belt and repetitive chime).
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Key-in-ignition (repetitive chime).
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Headlamp-ON warning (repetitive chime).
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Headlamp-ON reminder (repetitive chime).
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Door ajar (warning lamp and single tone).
Four distinct chime rates are used to indicate warning. They are:
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Safety belt warning chime is one chime per second.
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Key-in-ignition warning is two chimes per second.
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Headlamp-ON warning is four chimes per second.
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Door ajar warning is a single chime.
Warning Chime, Safety Belt
The safety belt warning chime warns that the safety belt is not fastened. The safety belt warning chime will sound when:
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The driver safety belt is not fastened when the ignition switch is turned from the OFF/LOCK or ACC to the RUN or START position.
The safety belt warning chime will stop sounding when:
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Safety belt fastened.
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Ignition switch is switched from the RUN or START to the OFF/LOCK or ACC position.
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After chime has sounded for six seconds.
The safety belt warning chime inputs are:
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Ignition switch START position (battery potential on the START [clutch depressed] input).
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Ignition switch RUN position (battery potential on RUN and RUN/ACC inputs).
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Driver safety belt switch (grounded when not fastened, open circuit when fastened).
Warning Chime, Door Ajar