No power to ignition

[Tazdad]

I have a 1999 Gulfstream Sun voyager, I put in 3 new batteries and ran it for 2 days. The 3rd day I have no power to the ignition, and the instrument cluster. I have checked all the fuses and they are fine. Please help!

 

[bharbison2500]

What chassis and engine combo do you have?

 

[Tazdad]

It's a Ford 6.8L V10