2003 Dodge Ram Warning light in right lower dashboard

I have a 2003 Dodge Ram 1500. And a light has appeared in the lower right corner of the dashboard that is red. Looks like 2 vertical lines with a lightning bolt looking symbol between the 2 lines. Can you tell me what this indicates. It came on only for a brief second. The truck seemed to lose all power. Then was fine. I bought used. And have no manual and can't find any info online.
Thanks