Hello all, on my way in to work today my truck lost engine power, and headlights when I flipped the heater switch to high. It will crank over but no go. I checked all of the fuses and they are all good. I would have expected to see the heater fuse blown. The hazards work but no horn or interior lights. I have the haynes and Clymer manuals and I am trying to locate a master fuse or something like it. Does this truck have such a thing. Keep in mind that this truck has over 200K on it. Thanks for the help.