my wiring harness in the 73 was crap and shorting out so i took the harness out of the parts car 74..everything else fit except when it came time to hook up the heater switch..what the F..the wiring is also dfferent on the heater box connection ..the 74 has different colors of wiring and one additional wire..the 74 also has a box that is down by the steering collum its black but i think is called the dreaded yellow box?? what the **#@ does this thing go to? anyone have picts of the 74 heater switch? any help would be greatly appreciated..thanks yergntiger93@yahoo.com