my seat belt light stays on all the time. the door chime works perfect as well as all other functions for the lap belt system except for the light always staying on. i know the easy thing is to unplug the bulb, but i would like to find the reason. does the light illuminate for the shoulder not being plugged in or the lap belt or both have to be plugged in? does anyone know what the wires are for the lap belt under the seat and when the lap belt is plugged in do they go to ground or read resistance?