I will try to look more into this.
Why did FU14 blow?

Is the 101 code the only code that is coming up or is it the last of several? If Access 7 has no power then you will get a CAN error as well. If the lights on Access 7 are not lighting up I would check CA703-10 #2975 which is key switch pos and CA703-8 #569 which is batt neg and see if one is open. I have had error codes lead me astray many times because I failed to simply look and see what the truck was doing or not doing. Sometimes an error code is a by-product of another problem like when a module gets no power and then there are CAN error codes. Hope that helps.