1988 bighorn 2.8td master relay/fuse location?

[poopertrooper96]

Hi ALL

I recently removed my alternator and rebuilt it with new seals for the vacuum pump as it was leaking oil. when re-installing everything it got dark and with no work light i accidentally wired the positive and negative terminals backwards and now the truck has no life whatsoever. i suspect i have blown a master fuse or relay of some sort but i dont know where it is. hope somebody can help. thanks