My truck has sat for over a week, get in and notice the MM3 display is not on and the lights are blinking, red, red, green, red, red.
I found a thread about this same issue (link below) and unplugged it and let sit all night. Plugged it in this AM and started truck, still blinking red, red, green, red, red. I noticed someone said to unplug and then plug back in while the truck running, will try that next.
With respect to my trucks batteries, less than a year old. ....yeah, I know, that doesn't mean anything.
I'll have them checked JUST to be sure.
https://www.igotacummins.com/threads...hlight=display
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