As reported to the FAA. Reports are unverified, and codes are left as the FAA publishes them.
What was found
FUELER REPORTS REFUEL PANEL INDICATOR FOR CENTER TANK READS "FAIL". GROUNDED - YES. VERIFIED CNTR TANK REFUEL INDICATOR SHOWS "FAIL" ACCOMPLISHED WIRE CHECKS PER B737-800 FIM 28-21-805 NO DEFECTS NOTED REPLACED CNTR TANK REFUEL INDICATOR REF B737-800 AMM 28-41-61. OP CHK GOOD.