The signal output is communicated to a fuel system control circuit including a first operating relay operatively connected to {HEAD ~ a jettison fuel pump enable circuit portion}, where the signal output operates the first operating relay and the jettison fuel pump enable circuit portion to operatively control the jettison fuel pump and deliver {TAIL ~ fuel} to the fuel manifold 
The signal output is communicated to a fuel system control circuit including a first operating relay operatively connected to { HEAD ~ a jettison fuel pump enable circuit portion } , where the signal output operates the first operating relay and the jettison fuel pump enable circuit portion to operatively control the jettison fuel pump and deliver { TAIL ~ fuel } to the fuel manifold
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