The Stovebolt Site Forums The Shop Area The Electrical Bay need backup lights to go on when in "R"

I replaced all the old wiring and lights, with all new ones from American Classics thinking it was the old wiring, replaced the Backup light-safety switch
'cause it was toast.Re-wired the headlight switch so the parking lights are on at the same time the headlights are on. What am I missing?
Many thanks in advance.