Tail lights out

Download a free 72 factory shop manual here:

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

Rather "alternative" diagrams at "My Mopar:"

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

http://www.mymopar.com/downloads/1972/72ValiantA.JPG

http://www.mymopar.com/downloads/1972/72ValiantB.JPG

In the service manual, start with page 8-151

Have you checked the fuse? Do the park lights work? Instrument lamps?