I would set down with a pc. of paper and wright down whats in the truck.
1- ign sys.
2- head lites
3- tail lites and turn sig.
4- heater or heaters (bus)
etc.
Thats a good start from there you can figure out the fuse size
1- 10 amp
2- 20 amp
3- 15 amp
4- ? don't know what kind of heater is in a bus
Try and keep the sys. seperate
Pete
