What was found
RT DEFUEL VLV LIGHT REMAINS ON WITH SWITCH IN EITHER ON OR OFF POSITION. IAW MEL 2826B REMOVE CP FROM VLV & CONFIRMED VLV IS IN CLOSE POSITION, CB`S PULLED & COLLARD. CONFIRMED NO FUEL TRANSFER OR ABNORMAL INDICATIONS WHEN MANIFOLD PRESSURIZED. ALSO VISUALLY CONFIRMED VLV OPERATED NORMALLY. TROUBLE SHOT IAW WDM 28-26-11. REPLACED K450 & K453 RELAYS, NO HELP. REQUIRES FURTHER TROUBLESHOOTING OF WIRING BEFORE REPLACING ACTUATOR. CAPPED & STOWED PLUG & COLLARED CB'S IAW MEL.