Electrical Problem: Dash and Interior Lights

[1972ChevyCheyenne]

I am in the process of reassembling my truck, anyway I had the dash and interior lights all working and went out again, now none work. I have been connecting and disconecting the battery regulary. I think my problem may be in the light switch. When I turn it to turn the interior light doesn't come on, and when it is pull out for headlights they come on but the dash lights don't. Does the light switch sound like the correct option. Also I didn't see blown fuse except the taillight fuse. Thanks

Jamie