I have a 2000 Buick Lasabre with approx. 135,000 miles. It has a 3800 V6 series II engine. The heated seat for the driver is not working. When you push the button the light comes on but the seat does not warm up. Also you must push the button several times in order for the light to go out. When you push the button for this you can hear a clicking noise from underneath the dashboard. Is there a relay for this under the dashboard?