I just installed cab lights on my 64, C30. As an electrical "dummy", I'm not sure if I should wire them through a relay, or just patch them into an existing wire under the dash that feeds the lights. There are five of them, and they are not LED, so I am not sure if the draw will require a relay or not. I want them to be on when both the parking lights, or the headlights are activated. Thanks guys!

1964 C-30 http://s1179.photobucket.com/albums/x383/autoart3/64%20one%20ton%20dually%20flatbed/