GW,
Turn the 3 prong head light plug facing you with 1 terminal on the bottom and 1 terminal on each side. The terminal on the bottom should have a Brown wire (ground) the terminal on the left, Black wire (low beam) and the terminal on the right, Green wire (high beam) The wires should go to a terminal board on each inside fender.
Here is the wiring diagram for the 46.
http://chevy.oldcarmanualproject.com/electrical/wiring/pdf/46truck.pdf
Good luck with your project,
Harold
shake

Last edited by Harold46; 10/22/2013 4:31 AM.

Harold
Is a restoration ever finished?