In researching this a bit it seems that the BCM and FLM need to be reset as first step in troubleshooting after you check the fuses and bulbs of course. For the earlier models like 2007 and 08 ForScan does not work for BCM reset. Maybe just undo the battery and cross the cables with headlights on to drain any residual and the total loss of power will reset. But from looking at the electrical diagram it looks like there is a FET that controls both the low beams independently inside the BCM and I suspect those are going bad on these cars due to low quality FET within the BCM. So it looks like with power verified coming to the fuse then the only other thing in the diagram is the FET. Pull BCM and test FET and desolder and replace with higher quality from Japan....rated for more duty cycles. Save 3 cents to screw customers for the repairs....buy Toyota or Honda next time?