The present invention provides a method and apparatus for selectively enabling or disabling a plurality of machine systems of a work machine. A service control box is provided on the work machine at a position accessible to a service technician. The service control box includes a battery disconnect switch and at least one service mode control switch. The service control switch is adapted to enable at least one machine system for the purpose of performing a service procedure on that machine system. A keypad may be used as a service control switch and be adapted to enable or disable a plurality of various machine systems. The service control switch may be adapted to be used from locations on the work machine that are remote from the service control box.