Roger wrote: > If '68 is close enough, I have the "Principles of > Operation 1968 Auto Temp System" Technical Training book > as well as the Master Technicians Service Conference > Reference Book 68-4 "Auto-Temp Diagnosis (Testing It)". Believe it or not, Brad Hogg has already generously scanned and posted these two training booklets for the club's website. "68-3: Understanding How Auto-Temp Works" is available at this address: http://www.imperialclub.com/YearByYear/1968/Tech/68-3/index.htm and "68-4: Auto-Temp Testing & Diagnosis" is here: http://www.imperialclub.com/YearByYear/1968/Tech/68-4/index.htm Hope this helps!! Best Regards, Chris Trettin 1956 Imperial sedan