headlights & brakelights don't work

After about 5 years research, parts gathering, time and effort - I have the 302 EFI situated. //long story in its own

Now it's time to get the veh registered and inspected, but my headlights don't work and the brakelights either. If I swithc to highbeams they come on. Parking lights work on all fours, and turn indicators. Brake light switch is connected. (and hosetly I cannot tell if it's hte headlights or highbeams that are working, but being able to see them clearly at 6pm in TX - it's gotta be the highbeams working) //i'm not at the car while typing this, but I just remembered there's a blue light in center of cluster to indicate highbeams - it's been that long...yea.

What measures can I take to diagnose & fix the cause? I checked fuses, only one blown is 14A HTR _ guessing that's the heater blower moter fuse. //No heater existant

Okay, I'll check out the dimmer switch - it's probably the culprit..

Figures. I've changed-out this turn signal switch at least 3-4 times before already. There's something definitly wrong with my steering column as it keeps burning these things out, when I have the grant steering wheel (yea, poor design) connected, I cannot fit the nut onto the column all the way. I'll have to take some pictures. I'll test as advised, but now that you mention it - it's 90% probable to be the turn signal switch due to my previous history with those.

Would you happen to have information on how to fix a steering column? When I have my grant steering wheel connected, I can move the shaft & wheel to the left or right about 1/2" each side (okay, maybe 1/4"), and the steering wheel nut never gets fully threaded on.