I want to be able to use my cooler and my television on board this POS Columbia class Freightliner but none of the 12VDC power outlets in the rear are hot.
I have already checked for blown fuses marked "Fridge" or "TV" at the fusebox underneath the dashboard cover.
I found nothing....
What or where else should I be looking for them?
Thanx in advance for any help from any one.

you have another fuse panel, to the left of the drivers seat. That's where that fuse for your bunks 12V outlet is. Don't ask me which one, but I just read about it somewhere, and I believe they said it was the 15W one.
Hope this helps.

Yeah, and you just about have to remove the driver's seat to get to it.

Not really, but you do have to position the seat out of the way, then get the curtains out of the way too. I have one that is not working in the back corner of the bunk. I've even had the panel off and checked that out too. The fuse should be in the panel next to the driver's seat, but I can plug a fuse into every one of them and that outlet does nothing at all. Learning to live without it.

Thanks folks!
I checked inside the wall panel next to the seat (both of 'em) and found no additional fuse panel in either side.
I did find a pair of wires (on the driver's side) with inline fuse holders in them but neither one looked blown.
I can live without the bunk outlet but would really like to get power to the cooler 'closet' and the television 'cove'.

When I had the same problem as you, my dealer (the one locally here), just pulled out the old fuse, put the new one in and let it go.

You got a place that you go to often enough that they know you? Ask them about it. My truck was a 2007 that had that problem, but I am sure that this is not the only year where the second panel was in that spot.

I don't think I could let that go, I need the extra out lets.

There's a little door built into the wall behind the driver's door. You have to use a flatblade screwdriver to unlock it. Move the seat all the way forward and (i believe) down. Tilt the backrest all the way forward, move the curtains out of the way, and look at it from behind the seat. There are a couple of fuses in there.

you could get one of those adapters that make one outlet into however many, and get some wire, make your adapter as long as you need to go from the front to the back, maybe run it under the mats or behind some trim, that would be quick and cheap

Just be sure to use the largest practical wire and do your electrical math so you don't end up starting a fire.