HI GUYS, THERE IS A WIRING MODIFICATION THAT NEEDS TO BE DONE WHEN REPLACING AN ECC CONTROL ON 93 ONLY 850'S. TSB # TP 31861/2. YOU NEED PART # 271927-6, WIRING KIT. CALL YOUR LOCAL DEALER AND SEE IF THEY WILL FAX THIS TO YOU, IF NOT, E-MAIL ME ( [...] ) AND I... Login to read more.