BATTREY LIGHT -MESSAGE CENTER

There are about a bazillion reasons this could happen.

Out of gas?
Bad alternator?
Failed fuel pump?

Blown master link on the battery cable?

You will need a mechanic to diagnose unless it is something obvious like fuel.

do you mean interior light comes on , if so one of the door switches are not being depressed to shut of light this may include rear hatch door switch also , open one door at a time and depress switch with finger if light goes out try next door , also if light has been on you may have flat battery check charge first.

Read this service bulletin
Service 4WD Light on Ricks Free Auto Repair Advice

it is supposed to stay on. it is to tell people that the alarm is on. to deter people from stealing. I have same truck 2011 cummins 2500 stays on to

The battery is shot, Get a new battery.

Your battery is definitely low. First clean the terminals on the battery and the inside of the terminal rings on the wires. If you have a slow charger put it on that overnight and see if it holds a charge. If it still keeps depleting or doesn't charge overnight then either your battery or your alternator are done....possibly both. So take the battery to have it load tested. Most places that sell them can test them. If the battery is done replace it then test the battery with a volt meter. If the old battery is still good put it back in the vehicle and test the voltage with a volt meter. With the engine off the voltage should read 12 volts (once its fully charged or if its new) with the engine running it should read around 14 volts. If it is way higher than that or it doesn't go up at all your alternator requires replacing. Alternators are fairly easy to replace but if you don't feel comfortable with that take it in to a mechanic.

i would have the battery checked out 1st, it could very possibly have a bad cell in it. if battery checks out ok, then have the alternator checked out.

sometimes turning the ignition on 3 times quickly without starting will reset the computer. If the van has power locks and keyless entry then try using only the keyless entry. Sometimes your car wont have a alarm but an anti theft device which will not allow it to start if it goes off or something triggers it.

fob broken or bad, or fob battery bad, key problem not reading key code

This is the factory installed "Security" light. It blinks to let you know that the security system is active, and to ward off potential theives. It's part of the factory anti-theft system. Also, it is a diode, and consumes virtually no battery power.
Normal condition; nothing to worry about.