All gauges stopped responding & A/C stopped working

I have a 2007 freightliner colombia that I am having electrical issues inside the cab .the tach and speedo quit the AC quits both turn signals and flashers quit the qualcomm quits the ABS light comes on the voltage will jump to 16 then will fall back to normal and every thing works again any Ideas what it might be thanks

 

sounds like the alternator might be overcharging. Check your voltage at the alternator with the truck at idle. Should be around 14 volts.

 

I'm having exactly same problem with 2006,burning up n this Georgia heat so is my PUPPY. Please help

 

Im having that problem now. And the only thing I did was shut the truck off. About 2 hours later when out and started it and the gages don't work. All the fuse are good and none are missing.
Does anybody got any advice?

 

Did you figure your trucks issue out? I know this is an old post but now my truck is doing the same. Only guages that work is air pressure. Also a/c not work or fan for motor. Any help to resolve would be greatly appreciated

 

Hey man my truck is doing what yours did. How did you fix it?

 

I believe he said he put a fuse in that had fallen out look for empty 15 amp slot . Seems to be a bug going around

 

I wish mine were that simple I had to end up replacing the light bar. Just posting incase anyone else comes up with same issue. That was my solution

 

I have a 2004 freighter
My gauges go wild
Ac stop working and my display read no data
Have replaced fuse and clean ground wires