SNA TWR ALERT B752 OF COURSE DEV AS FLC DISCOVER THEY HAVE INCORRECTLY SET UP APCH FROM ILS RWY 19 TO LOC BACK COURSE RWY 1L.

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OCCASIONAL MODERATE TURB AND HVY RAIN. SHORTLY BEFORE COMMENCING APCH; THE RWY WAS CHANGED FROM THE BRIEFED RWY 19R TO RWY 1L BACK COURSE. AFTER A QUICK CHANGE OF THE NAV EQUIP AND REBRIEF OF THE APCH; WE COMMENCED THE APCH. AS FO; I HAD RAW ILS SELECTED ON HSI; THE NEEDLES SHOWED US NEEDING TO FLY L AND SLIGHTLY L OF THE MAGENTA LINE. AS WE APCHED TIP OVER; THE APCH DID NOT LOOK RIGHT AND THE CAPT DECIDED TO GAR AT THE SAME TIME THE TWR CALLED WELL L OF COURSE. WHILE SETTING UP FOR THE SECOND APCH; THE CAPT NOTICED THE WRONG COURSE SELECTED IN THE ILS CTL HEAD. SUBSEQUENT APCH WAS UNEVENTFUL. I ATTRIBUTED THE GAR TO A LATE RWY CHANGE; POOR WX AND FO INEXPERIENCE WITH BACK COURSE APCHS. I HAVE NEVER FLOWN A BACK COURSE APCH AND POOR WX AND LATE RWY CHANGE DID NOT HELP. FINDING THE MISTAKE AFTER THE GAR JOGGED MY MEMORY REGARDING ILS SETUP FOR BACK COURSE APCHS TAUGHT AT THE ACADEMY. I PERSONALLY HAVE REVIEWED NON PRECISION APCHS; SO I WILL BE PREPARED NEXT TIME. WE DID NOT GET BELOW 1700 FT DURING THE FIRST APCH; SO I DON'T BELIEVE THERE WAS ANY INFRACTION. SUPPLEMENTAL INFO FROM ACN 499787: FO; WHO WAS NOT HIGH TIME IN ACFT AND HAD NEVER DONE A LOC BACK COURSE APCH; HAD SWITCHED IT 180 DEGS; THINKING IT SHOULD SHOW INBOUND COURSE. REAL SOUL-SEARCHING WERE OF MY OWN ACTIONS. WHILE I HAD BRIEFED ALL THE REQUIRED ITEMS FOR THE APCH; IT WAS VERY RUSHED IN TRYING CONDITIONS. I BELIEVE I DID SAY 'COURSE SELECTION REMAINS 194 DEGS'; BUT IF I DID; IT OBVIOUSLY DID NOT REGISTER. I SHOULD HAVE MADE TIME TO BRIEF THE APCH SO ALL ITEMS WERE HEARD AND UNDERSTOOD; INSTEAD OF RUSHING. I WAS NOT MENTALLY PREPARED FOR A NON PRECISION APCH; WHICH I HAD NOT DONE SINCE LAST RECURRENT; AND HADN'T TAKEN THE TIME TO REVIEW GAR PROCS IN MY MIND; SO IT ENDED UP SLOPPY. LESSON IS ONE OF MANY WE HAVE TO RELEARN PERIODICALLY -- DON'T RUSH PROCS TO PLEASE ATC OR TO FEED YOUR OWN CAN-DO EGO.