Originally Posted by 5H4N3
http://www.how-to-build-hotrods.com/turn-signals.html

I got the adapter piece but it doesn't work

Can you add to that?
What is happening?

Are both rear bulbs dead?
Do the parks work?
Fronts?
Brakes?

Or is it just the signals not working.

On a side note
I would recommend using a 7 wire column clamp switch.