My AWD doesn't kick in often, but when it does and when i happen to have my headlights on, i notice the headlight flickering.

Has anyone experienced the same? is this perhaps a sign of a weak battery or alternator?

 

I've never had this problem on my AWD G. I am simply guessing but it sounds like a grounding issue. I had a problem on a couple of my other vehicles; when I braked the lights would dim/flicker. Added a grounding kit and the issue was resolved. Someone else might know of another issue though.