The automatic seat belt motor is not working correctly.
I have seen this before. It is not common but seat belt retractors do fail from time to time. The actual repair requires the replacement of the retractor itself. Care must be taken as this is a safety item. If your state has a safety inspection, this is something that will need to be repaired in order to be in compliance. I suggest seeking the help of a professional technician to help you with this repair.
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