It seems my truck(1965 Chevrolet lwb stepside) has a later model steering column, which has the hazard lights switch on the column. The '60-'66 trucks it seems had a separate switch under the dash for the hazard lights.
 

    "Even on the passenger cars, GM never had a hazzard switch on the column until the '67 model year. - Royer (Chevytalker #5852)"
 

    The wire for the hazard switch coming out of the column is a solid brown wire. I wired it like so, brown wire to a 552 flasher unit(find it in electrical section near bulbs and connectors at parts store) and then an inline 20 amp fuse to a 12 volt ignition off power source. I used a multimeter to find the 12 volt ignition off source.
 

    When I pushed in the switch, I had working hazard lights. :)

    Here is another tip, that I did not read until after I had wired mine up but makes sense to me:
 

    "GO IN TO YOUR LOCAL PARTS STORE AND PICK UP A HEAD LIGHT PLUG AND A FLASHER . THE FLASHER WILL PLUG RIGHT INTO IT - Bud (Chevytalker #14717) poster on chevytalk.com forums"