Beginning in 1971, all cars were required to have a warning system which operates a buzzer and warning system light if either of the front seat belts are not fastened when the seats are occupied and the car is in a forward gear. A light with the words Seat Belts, or Fasten Seat Belts is located on the dashboard while a buzzer is located under the dash. They are controlled by pressure sensitive switches hidden in the front bench or bucket seats. A switch in each of the front seat belt retractors turns off the warning system only when the belt or belts are pulled a specified distance out of their retractors.
Two different types of switches are used to control the system, depending upon the type of transmission used.
On manual transmission equipped cars, the transmission neutral switch is used to activate the seat belt warning circuit.
Automatic transmissions use the inhibitor switch to activate the seat belt warning circuit.
When removing the seats, be sure to unplug the pressure sensitive switches at their connections.