Switched wire not working?

So I got my truck with a aftermarket Tach in it. The Tach was wired to the radio switched power source. I took out the Tachometer and now my switched wire for my Radio doesn't work? It's the Blue/Red wire if I'm not mistaken. But I get no power from it or any other wire under there when the key is in the on position except the constant power source. Is there something I should look for to get this wire to work again other then the fuse?

dome light fuse would be my guess

no the dome light is on constant power

the fuse i belive you should be looking for is the RADIO fuse

room

ok this sounds dumb but there isn't a Radio fuse labeled on my fuse block. I know what a NEWB but I looked and there isn't one

under the dash fuse panel, yes there is

theres also one labeled ROOM

I have the room one just not one labeled Radio

mine doesn't have a radio one either, but i have the room one

So I took out ALL my fuses and everyone of them was good! If they looked any kind of old I replaced them....So the switched wire still doesn't work :/