Weird thing tonight. Had my truck in 4X4, and twice the battery light came on, and within seconds shut off. No other issues noted. My fan seemed off at one point, but not really sure if it was or not. Might have been my imagination.

Truck ran fine, no other issues but squealing sound for a few seconds, but I think that was a wet belt, since it was a combo of snow, slush and a buttload of rain. Water was everywhere. I am assuming water might also have caused my battery light issue. Like I said, shut off seconds after turning on.

I didnt notice any power loss etc.

 

Did you check the battery connections? I would disconnect the battery, clean the terminals, and reconnect.

 

Ditto the battery connection thing.

 

I wonder if your alternator is not getting ready to go, and the water slush and snow just allowed the belt to slip on it making the squealing sound

Take the belt free of it, and turn it by hand, is it smooth, or does it kinda grind/make noise?

 

mine did this once or twice, i ignored . about 200km later my water pump blew up(figure of speech). check for excessive play in the fan.

 

I would almost bet a million (if I had it) that the slipping belt was the culprit meaning the computer noticed a drop in charge going to the battery while the truck was running.