1991 Ram Van Tail Brake Head light problem

Went to install a cd player. Ended up shorting out my tail lights and dash lights. Replaced fuse twice. Dash lights work again. Turn signals light but don't flash. Brake lights work.

Brake lights, tail lights, and turn signals don't work when headlights are turned on.

Tried replacing head light switch. Didn't fix it.

Any ideas?

You might want to inspect your fusible links to see if one of those blew. They're up around the power brake booster.