What was found
(CAN) MAINTENANCE FOUND NR 2 MAIN AFT FUEL LOW PRESSURE LIGHT ILLUMINATED DURING OVERNIGHT MAINTENANCE. SYSTEM INSPECTED, RELATED CIRCUIT BREAKER FOUND POPPED. AIRCRAFT RELEASED UNDER MEL 28-1-1. MAINTENANCE REPLACED NR 2 AFT FUEL BOOST PUMP - SYSTEM DID NOT FUNCTION CHECK SERVICEABLE. FURTHER INVESTIGATION FOUND A BROKEN AND BURNED WIRE IN THE THREE WIRE BUNDLES GOING TO CONNECTOR D74 FROM THE AFT BOOST PUMP. THE REPORTED PROBLEM IS ADDRESSED BY SERVICE BULLETIN 737-28A1188 RELEASED MAR. 06/03. WESTJET COMPLETED SB FEB.27/03. MAINT REPAIRED WIRING, PLUG D74 WIRE IAW MM 20-10-11. SYSTEM GROUND CHECKED SERVICEABLE & RETURNED TO SERVICE WITH NO FURTHER INCIDENTS TO REPORT.