1998 Olds Aurora

On the driver side the horizontal control which raise or lowers the front
driver side seat and the vertical control which controls reclinning, does not
work. Does any one know how to fix this problem to get horizontal and
vertical to operate again.  I have check the fuse blocks on the dash and
under the back seat.  I believe it's a fuse, however I unable to locate it. I
have checked the plug-ins under the seat and did not see any loose
connections. Thanks for any help you can provide.

Plinnus