I just took the truck apart and did both head gaskets...after putting it all back together, the truck will not do anything. meaning electrically it acts as if there is no power. i checked the battery voltage which was just over 12, i also checked at the started which was also just over 12, going to the fuse box, the fuses apear to be good but no power there...i have double checked the grounds and all apear to be fine...whats the next step, no lights in the cabin nor anywhere work, and appears to be dead