73 74 duster dart val, dart spt Wiring diagram

You can download a 72 shop manual (newest I know of) here:

http://www.forabodiesonly.com/mopar/showthread.php?t=132309&highlight=manual,+download

You can get "usable" wiring diagrams over at "MyMopar" but they don't have accessories such as the defogger

http://www.mymopar.com/index.php?pid=31

74 diagrams:

http://www.mymopar.com/downloads/1974/74ValiantA.jpg

http://www.mymopar.com/downloads/1974/74ValiantB.jpg