Sorry I missed this thread. If you have my harness, then before you can switch back to the stock lighting, you need to determine what headlights you have. If you have H4 headlights then you can't just switch back to the stock wiring, it won't work. You would need to switch in sealed beam headlights. If you want to pay the shipping, you can send the headlight harness back to me and I will troubleshoot and fix any problems. But, before you do that, you need to make sure your stock wiring is OK. This may involve purchasing some inexpensive sealed beam headlights and switching back to the stock wiring. Then follow this procedure to troubleshoot the headlights:
https://forum.ih8mud.com/threads/headlight-troubleshooting-thread.423985/
https://forum.ih8mud.com/threads/headlight-troubleshooting-thread.423985/