What was found
ARRIVED AT HELICOPTER, THE FUEL QUANTITY INDICATION WENT FROM 50 PERCENT TO 0 PERCENT. AN UNUSUAL ODOR FOLLOWED DURING FLIGHT. TROUBLESHOT SYS, FOUND WITH A/C ELECTRIC POWER ON, AND BOOST PUMPS ON. FLUCTUATING FUEL INDICATION, LOW FUEL PRESSURE, AND INOP FUEL PRESSURE LIGHT. FOUND COMMON GROUND WIRE TERMINAL END FOR THE INDICATION, THE FUEL PRESSURE AND THE PRESSURE SWITCH, "BROKEN". RECONNECTED GROUND USING A NEW TERMINAL END IAW AEC SPM, OPS-CHECKED SYSTEM, ALL INDICATIONS NORMAL, NO EVIDENCE OF ODOR IN CABIN. ACFT RELEASED FOR FLIGHT.