Seat Belt Reminder Lamp: Description and Operation

CIRCUIT OPERATION
The fasten seat belt indicator is used with the warning chime to tell the operator to fasten the seat belt. The seat belt switch is normally OPEN when the seat belt is buckled.

If the seat belt is not buckled, the switch CLOSES, and a ground path is completed on the G10 circuit to the Z1 circuit. The G10 circuit is connected to the Body Control Module (BCM). When the ground path is complete a signal is sent over the CCD Bus to the instrument cluster. This illuminates the lamp in the instrument cluster.

When the ignition switch is moved to the START position, the lamp is illuminated as a bulb check. Logic internal to the BCM determines the length of time the lamp remains illuminated.