i have a 2001 f150 supercrew 4.6l 4x4 and driving to work this morn the 4x4 dash light started coming on and off by itself i could hear what sounded like a relay kicking on and off butt the fourwheel drive switch and everything was fine put it in fourwheel drive and it worked fine and came out fine but the dash like still came on and off weather it was in or out of fourwheel drive seems to be maybe a relay problem but not sure what relay