I was recently about to replace cable from solenoid to starter just the smaller one going to spade terminal connector as it was in need of replacement..anyways truck was fine before however before I started this job it's now however dead 100%. No lights outside or in dash radio door chime nothing. New battery new terminals same with another battery he'll even if I attempted to boost I get nothing anywhere. No signs of power anywhere all fuses check all seem ok from the ones I can visually check etc... Ideas? Something in the power block?

 

Something similar happened to me while replacing my negitave battery cable , after doing this when I turned my headlighs on the truck would die. I cleaned all the grounds and terminal that the negitave cable connects to on the passenger side fender. And this solved my issue.

 

same thing kinda happened to me...turn key over,power,no power,power,no power......cable wires were on tight,so i thought?....retightened them and boom,easy fix.