The TBC fuse is for Truck Body Control. It is for the interior lighting and door locks.
In the fuse/relay center under the hood.
The fuse box on a 1996 Chevy Blazer S-10 is located to the right of the steering column. All the fuses in the fuse box are numbered. The fuse located in the number 18 slot is your cruise control fuse which is a 15 amp fuse.
Under the front passengers seat
We need to know what year the S10 is.
The fuse box is located on the panal betweeh the dash and the drivers door.
Fuse box by the driver side door that says FRT WPR
When you open the door on the truck it should be on the side of the dash.
Need to know what year you have, it makes a difference.
under the hood in the Fuse/Relay center It should be in the fuse box under the dashboard.
Check under your dash.
It should be in your drivers manual.
Owner's manual. If they had a manual they wouldn't be here !!