1998 Isuzu Hombre Fuse relay center

I have a blown 10A fuse in the fuse relay center of my truck. It is labeled TCB. What does TBC stand for. I recently had my Head lights go out. I found a burnt fuse in the side dash fuse compartment. It blows every time I turn the lights on. While trying to find the reason for my head lamps problem, I located the 10A TBC fuse burnt. At this point my truck will not turn over. I am in the process of checking all my ground and fuses. I am looking for some input on my situation as well as thr TBC definition. I have a Chilton manual but it does not have this informaion.