realise you are prob aware of this but>>>if u got to jump your bus pay paticular attn to the closeness of all that fuel and note any oil /petrol which may have gathered in engine bay !!!<<<<and REMOVE it ! >also, when removing jump leads ,switch on your lamps at least ,1st,(to reduce possibility of elec "spike" firing thru your bus elec. system. this stuff so matters !most bus fires start in engine bay !and most do not need to happen . best wishes.