Blinkers stopped working 99 Kia Sephia

This is regards to the following vehicle

99 Kia Sephia 56,000 miles 4cyl


I went to pull out the stock stereo yesterday and replace with new pioneer cd player well after pulling out the stock stereo I realized I needed to go to buy some more wiring well anyways I put the stock stereo back in but now I have no blinkers? I checked all fuses and none are bad

when you go to put the turn signal on you get nothing no lights for blinkers no blinker sound nothing at all

whats my next route? And im no mechanic by any means so if theres stuff I need to check can you please tell me where to look for it and how to tell if its bad?