Broken Heated Seats 2004 Venture

I have a 2004 Venture and the driver side seat heater is not working. The passenger side does work. The light on the switch that turns on the heater appears to have power because the light turns on. The fuse that powers this seat heater is also tied to the driver side power sliding door and the door works. Any ideas what the problem might be or where I can find a wiring diagram for this circuit.

Thanks.