wont start on the key or with the button under the cab? The lorry was turning over then justed stoped there is power to the relay in the cab but not to the starter motor?
check to see if battery charge w/l is ok if not that is where the fault is
usually alternator
q, July 2010
check wiring to alternator and make sure none are broken,i think it is connected through charging system so starter cant be engaged when engine is running!