replaced starter and cleaned connections now have no int lights radio or horn

Hello, it's possible that you could've had a power surge when doing the work that has fed back and blown some fuses. Check all related fuses to the audio unit and the horn. Beyond that you will have to do circuit testing in the individual areas to find out what's going on, using a shop manual electrical diagram and some test equipment. Use this link to find some shops near you that can help with your concern: www.repairpal.com/repair-shops