Well I replaced a fuse for my window switch because my windows were not going up or down...but my tuner powers on now....I'm not sure if those are on the same circuit

It starts up just fine in another vehicle.
Is there a fuse or something that would not send power to it if it were to be burnt?

i have a 2010 dodge ram 1500
I have the T1000 tuner
I plug my cord into the OBD2 port then my tuner and it doesnt even power on. But when i plug it into my computer it powers on fine.
Do i have to have the micro USB plugged in at the same time as when it plugged into the OBD2 port?