Seat Belt Switch - Description

DESCRIPTION





The driver side seat belt switch is a small, normally open, single pole, single throw, leaf contact momentary switch. The driver side switch is integral to the driver side front seat belt buckle (1). On domestic market vehicles, a second seat belt switch is integral to the passenger side front seat belt buckle. The passenger side seat belt switch consists of a fixed-position, Hall Effect Integrated Circuit (IC) chip and a small permanent magnet that are integral to the passenger side front seat belt buckle.

The front seat belt buckles are located on a molded plastic scabbard (2) and secured along with the seat belt buckle or the buckle and tensioner (4) mechanism by a screw near the back of the inboard front seat cushion frame. The seat belt switches are connected to the vehicle electrical system through a two-lead pigtail wire (5) and a two-way (driver side) or four-way (passenger side) connector shared with the buckle tensioner squib circuits on the front seat belt buckle-half, which is connected to a connector and take out of the seat wire harness routed beneath the front seat cushion. On the passenger side, a one kilohm diagnostic resistor is connected in parallel with the Hall Effect IC where the two pigtail wire leads connect to the IC pins.

The seat belt switches cannot be adjusted or repaired. If ineffective or damaged, the entire front seat belt buckle-half or buckle and tensioner unit must be replaced.