Dash turn signal and oil pressure light flicker

Replaced old steering wheel and still had the issue, never noticed it before. disconnected the steering column wiring harnesses and jumped the horn wire leading to horn relay and had same issue. To me this would indicate that nothing in the column is causing the problem. Replaced the horn relay and the lights in the dash (turn signal indicators and oil pressure idiot light) become more pronounced, they flicker on for a second and go out regardless of how long I hold the horn on for. Double checked the grounds and they appear to be good. I can not figure out why the back feed or ground issue wouldn't light up all the lights in the dash besides just the turn signals and pressure gauge indicator lights, I'm lost.