As reported to the FAA. Reports are unverified, and codes are left as the FAA publishes them.
What was found
#2 FUEL SYSTEM MAIN TANK FORWARD LOW PRESSURE ILLUMINATED WITH SWITCH IN ON POSITION. GROUNDED - YES. VERIFIED INTERMITTENT VOLTAGE AT CONNECTOR D76 AND SWITCH S6 OPERATES NORMALLY. REMOVED AND REPLACED GFI RELAY R21 OP CK GOOD REF B737-800 AMM 28-22-41. #2 FWD PUMP LIGHT NOW GOES OFF WITH SWITCH ON.