Could really use some help here

[Mountain Man]

Still have no dash lights or tail lights even though I have stop lights and signal lights.

Can a dash ground cause no tail light power?

Does anyone have a pic of where the instrument panel grounds?

I have a painless wiring harness on the truck and none of the fuses are bad.

I seem to be getting no power from the brown tail light wire at the firewall engine side connection, so the problem must be inside the cab.

I have even changed out the headlight switch with no success.

I need some good advise here.