Circuit Operation

The seat belt system is used to lock and unlock the seat belts. It consists of a seat belt control timer module, door ajar switches, ignition switch, and solenoids located in the seats.

When the operator OPENS the door, the door ajar switch completes a path to ground on circuit G75 for the drivers door, and G74 for the passengers door. The seatbelt control module then supplies voltage to the solenoids located in the seats, unlocking the seat belts.

Circuit R7 provides power from the module to the drivers seat solenoid, and circuit R8 provides power to the passengers seat solenoid from the control module. Logic internal to the module determines the amount of time the solenoids remain energized. Ground for the solenoids is supplied on circuit Z1.

Power for the seat belt control module is supplied on circuits A45 and F13. The A45 circuit is a direct battery feed and is protected by a 20 Amp fuse located in cavity 13 of the Power Distribution Center (PDC).

Circuit F13 is HOT when the ignition switch is in the ACCESSORY and RUN position only. This circuit is protected by a 10 Amp fuse located in cavity 15 of the junction block.

Ground for the module is supplied on circuits Z1 and Z2.