2012 Ram 1500 5.7L Hemi no electrical power at all

[lawrence Alexis]

2012 Ram 1500 Express single cab
5.7 Hemi Automatic
Approx. 78000 miles
W/o remote start

Over the last few weeks my Ram has developed an electrical issue
I have no power to anything, no dash, no lights nothing
The battery tests good and I put a good charge on it
A one time I was able to get it to work when I disconnected the battery for a couple hours while testing every fuse under the hood - they all were good
I have also tried another ignition switch
Checked the grounds (engine and body) both good
Cleaned the cables

Any ideas what to do next?

 

[lawrence Alexis]

There are a couple things that I thought strange when troubleshooting
There were sugar ants in the dash (a couple) and in the fuse box (a couple)
Also when checking grounds with the negative cable disconnected I did a resistance check between the positive cable and the alternator mounting bolt and got a reading. Should I have gotten any reading?

 

[lawrence Alexis]

Resolved - Can't tell you how stupid I Feel right now
Apparently the main cable coming into the fuse box was lose
I discovered this when I pulled it up to check the connections underneath of it and checked the power again and I had power and the truck started but when I started to put the fuse box back it cut off

I tighten down the connection and everything works great

 

[lawrence Alexis]

Resolved - Can't tell you how stupid I Feel right now
Apparently the main cable coming into the fuse box was lose
I discovered this when I pulled it up to check the connections underneath of it and checked the power again and I had power and the truck started but when I started to put the fuse box back it cut off

I tighten down the connection and everything works great