F 450 2WD Super Duty V10-6.8L VIN S (1999)
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Driver seat belt switch (grounded when not fastened, open circuit when fastened).
Door Ajar Warning Lamp
The door ajar warning lamp warns that a door is ajar. The door ajar warning lamp illuminates when it is grounded. The door ajar warning lamp
will be illuminated when any door initially becomes ajar while the ignition switch is in the RUN or START position.
The door ajar warning lamp will turn off when all doors are closed or the ignition switch is turned to the OFF/LOCK or ACC position.
The door ajar warning lamp inputs are:
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Ignition switch START position (battery potential when in START).
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Ignition switch RUN position (battery potential on both RUN and RUN/ACC inputs).
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Door open warning lamp switches (grounded with door ajar, open circuit with door closed).
