What was found
NR 1 FUEL TANK AFT PUMP LOW PRESSURE LIGHT ILLUMINATED WITH 5900 LBS INDICATED. ACFT GROUNDED. R18 GFI RELAY TRIPPED. ACCOMPLISHED FIM 28-22 / 803. FOUND WIRE W1136-3601B-16 SHORTED AT CONNECTOR D70 BACKSHELL. REMOVED THE DAMAGE, PINNED WIRING AND REPLACED THE CONNECTOR & BACKSHELL ASSY IAW SWPM 20-60-11, AND WDM 28-23-11. RESET GFI AND ONE CIRCUIT BREAKER P92-1D, CONFIGURATION CHANGE. CHECKED 115VAC AT PINS 1,2,3 WITH PUMP SWITCH ON. GROUND VERIFICATION SUCCESSFUL IAW FIM 28-22 / 803. REPAIR CONFIRMATION - NR 1 FUEL PUMP LOW PRESSURE LIGHT GOES OFF, PUMP OPERATES NORMALLY. REMOVED AND REPLACED THE NR 1 FUEL AFT BOOST PUMP AS A PRECAUTION IAW AMM 28-22-41-400-801. ACCOMPLISHED AN OPS CHECK IAW AMM 28-22-41-710-801. OPS CHECKED GOOD.