Okay, so I was at my cousins for the weekend and my friend shows up and tells me that, on her way here, her radio, lights, and other electronics just cut out. Her car continued to run, however, and when she tried to start it again, it was dead. I attempted to give her a jump (no pun intended), but her engine just wouldn't turn over. Now, shortly after, my CEL comes on.. It seems to coincidental for it to just come on.. Could if have been from the jump?