I have a 2004 SCREW Lariat, and when I turn on the ac/heater/defrost...anything, it will come on for a second or two and then turn off.....keeps doing this until I turn if off. You can hear the relay in the fuse box "clicking" when this happens. I switched out the relay and it didnt help. The lights around the control will flicker even though the thing is off.
It sounds like a short somewhere but, I dont know. Has anyone had this problem...would like to take care of it myself if I can.

Jack