I have a question about my "diff lock" light comming on when I have a load in the back of my truck..Whenever I load the back of my truck ie, my fourwheeler, or a few buddies, about 200lbs. or more, my "diff lock" light on my dash blinks. I don't notice any difference in my driving or hear any noises like my diff lock kicking in. Anyone else with this problem? Some say it might be auto locking, but why would it blink? Its not a consistant blink. Seems like wires are touching or somethin... please help?