my truck

Ok I have burnt wire on harness where it's
attached to under hood at firewall going
under drivers side cab, it's burnt 8in back
from female plug on inner side of fuselink
all th way back to gas tank to another
fuselink that looks good from there back to
taillights, now I replaced the burnt wire but
didn't on both fuselinks, I still have no
power, no crank, no start, no lights, no dash
lights, my brake lights don't even work, now
before I found th problem, I replaced
everything I thought was it, computer
system, new switch, new key switch, starter,
battery, cables, relay switch, fuel pump
relays, all th fuses under dash, just about
everything & 3 months & $400 dollars later, I
happened to take another look slowly at all
th wires & I think I finally found my problem,
burnt wire from harness at firewall to th gas
tank, that one wire was bare with nothing
covered it, after replacing it, I still have no
power no nothing, except I didn't replace
both fuselinks, U think if both fuselink is
fixed that I will have power again, I'm all out
of opportunities on what th hell it could be, if
anyone knows what they are talking about
please help me, thanks