What would be the reason for my headlights not working, turn signals don't flash they just stay on and I don't think the dash lights work on a 1986 Dodge Ram D150?

First, check all under-hood and under-dash fuses. Reading section X, below, might help:

https://www.askmehelpdesk.com/cars-t...ics-46563.html

Second, check and possibly replace the ignition switch and harness.