A wake-up signal test system to test a wake-up signal output by a platform controller hub of a motherboard includes a test card and an oscillograph. The second electrode can be manually removed from the housing and then manually returned to a resting position within the housing. Also included is a thermally activated actuator for opening the valve in response to an engine condition such as load or a need for power. The first and second manifold ducts are connected to respective supply devices adapted to supply them with a flow of liquid and a flow of gaseous fluid respectively. An operator station extends from a back end of the base unit.