What was found
LEFT SYSTEM AND LEFT DEMAND PUMP LOW PRESSURE LIGHT ILLUMINATED WITH PUMP ON AND EICAS SHOWING 3000 PSI. ISOLATED M925 TIME DELAY MODULE AND CHECK RESISTANCE FROM M925 TO LOW PRESS CONNECTOR. METER SHOWED 1.6 OR WIRE GROUNDED. ISOLATED GROUND IN WIRE BUNDLE FROM D4280P TO D52 REF WIRE DIAGRAM 29-11-12. ACCOMPLISHED WIRE CHECK FROM D52 TO APPROX 3 FEET. NO DEFECT FOUND. MOVED WIRE NEAR CON D4280P AND SHORT WENT AWAY. FOUND SHORTED WIRE PIN 4 ON WIRE W398-006-18 ABOUT 8 INCHES AFT OF D4280P. ACCOMPLISHED REPAIR. PERFORMED OPERATION. CHECK OF LT HYD PUMP IN AUTO AND ON, PRESSURES NORMAL AND NO FAULT LIGHT NOTED.