ok so when im driving all the lights on the dash light up and my headlights flicker and my speedometer starts jumping up and down, this started happening since like the winter time, first once a week or so now its been happening everysingle ride. here are 2 videos i recorded of the problem.......VIDEO 1 - https://www.youtube.com/watch?v=RUIfWdFOcSE VIDEO 2 - https://www.youtube.com/watch?v=JVy9soXnIIg

 

i have a 2012 jk unlimited sport

 

Have you installed anything electronic recently? Lights, CB, or guages? Check the grounds, most of the time loose grounds will cause what you described. How do I know? Reading this forum for one and personal experience just yesterday, in fact. Tighten them up and hopefully that will be the end of your problem. It was the end of mine.

 

This ^^^ it's free, and always a safe first thing to check.