I have a 2016 xlt sport, I recently bought led lights with bliss “but not using bliss” and bought the tail light harness to account for new connections. Installed the lights and the led strip works but not the break lights or turn signals, any help would be appreciated

 

Going to need more information: are you upgrading to OEM LED tail lights or aftermarket? What harness did you install (OEM # or aftermarket?). Also a picture is always good to show what is happening but not necessary. I upgraded from OEM halogen to OEM LED using Boosted Grey Goose Designs harness following this thread How to: Swap for OEM LED Taillights - Page 124 - Ford F150 Forum - Community of Ford Truck Fans You might post there if going the OEM route.