Vehicle and vehicle seat belt system

1. A seat belt system for a vehicle seat comprising:

a D-ring assembly including a visible-light source;

a tongue;

an anchor;

a retractable belt strap passing through the D-ring and tongue, and terminating at the anchor;

a buckle configured to receive the tongue; and

a controller programmed to, in response to a detected trigger condition requiring a vehicle occupant to locate the position of the D-ring, illuminate the visible-light source.

2. The system of claim 1 , wherein the buckle includes a light source.

3. The seat belt system for a vehicle seat of claim 1 , wherein the trigger condition is a door of a vehicle being opened.

4. The seat belt system for a vehicle seat of claim 1 , wherein the trigger condition is an ignition of a vehicle being activated.

5. A vehicle comprising:

a D-ring having a visible-light source;

a belt strap passing through the D-ring;

a tongue connected to the belt strap;

a buckle; and

a controller programmed to, in response to either a door of the vehicle being opened or an ignition of the vehicle being activated, illuminate the visible-light source.

6. The vehicle of claim 5 , wherein the controller is further programmed to illuminate the light source of the D-ring only if ambient light conditions fall below a predetermined threshold.

7. The vehicle of claim 6 , wherein the controller is further programmed to illuminate the light source of the D-ring for a predetermined period of time after either the door of the vehicle is opened or the ignition of the vehicle is activated.

8. The vehicle of claim 7 , wherein the controller is further programmed to illuminate the light source of the D-ring after the predetermined period of time if a seat of the vehicle is occupied.

9. The vehicle of claim 8 , wherein the controller is further programmed to terminate the illumination of the light source of the D-ring if the belt strap is pulled from a stationary position and the tongue and buckle are engaged.

10. The vehicle of claim 5 , wherein the buckle has a light source.

11. The vehicle of claim 10 , wherein the controller is further programmed to illuminate the light source of the buckle if ambient light conditions fall below a predetermined threshold.

12. The vehicle of claim 11 , wherein the controller is further programmed to illuminate the light source of the buckle if the belt strap is pulled from a stationary position and the tongue and buckle are not engaged.

13. The vehicle of claim 12 , wherein the controller is further programmed to terminate the illumination of the light source of the buckle if the tongue and buckle are engaged.

14. The vehicle of claim 10 , wherein the controller is further programmed to, in response to vehicle movement and an unbuckled condition of the tongue and buckle, trigger a flashing of the light source of the D-ring and the light source of the buckle.

15. The vehicle of claim 10 , wherein the controller is further programmed to illuminate the light source of the D-ring and the light source of the buckle for a predetermined period of time after the ignition of the vehicle is deactivated.

16. The vehicle of claim 10 , wherein the controller is further programmed to illuminate the light source of the D-ring and the light source of the buckle for a predetermined period of time after the ignition of the vehicle is deactivated and the door of the vehicle has been opened.

17. The vehicle of claim 5 further comprising a sensing device in communication with the controller and configured to relay an occupancy status of a seat of the vehicle to the controller.

18. The vehicle of claim 5 further comprising a sensing device in communication with the controller and configured to relay ambient light conditions to the controller.

19. The vehicle of claim 5 further comprising a sensing device in communication with the controller and configured to relay an open/closed condition of the door of the vehicle.