Aftermarket LED blubs, the turn signal lights stay on when the sun goes down?

Hello,

It sounds like you have a BCM going out. here are the wiring diagrams so you can see how the system works and the BCM location and instructions so you can replace it. You will need to have it programmed, which should cost about $130.00. I would use this guide to check the connections and grounds before doing the BCM to be sure:

https://www.2carpros.com/articles/how-to-check-wiring

Check out the diagrams (below). Please let us know what you find. We are interested to see what it is.