Hi guys I think I figured it out ! :D
So, like TheRatLiker pointed out there is a cr.health command on the console, I had missed this entirely. CR1 (comms radar tower #1) was broken. Health was 0, so I ran over, checked it. You gotta play a minigame with red and green lights, then turn the lever when all lights are green and this is how you turn it back on.
The health levels, as far as I know, are determined by how many fuses you have in the fusebox of said tower, if I understood correctly. You have to play the minigame, simply inserting new fuses won't do it.