Headlights and taillights only work on auto

Hello,

It sounds like the BCM is going out. To be sure there are 4 relays and a hand full of fuses that run the system lets check those first. here are two guides to help with the headlight wiring diagrams below so you can see how the system works and which fuses and relays to test and their locations as well:

https://www.2carpros.com/articles/how-to-check-a-car-fuse

and

https://www.2carpros.com/articles/how-to-check-an-electrical-relay-and-wiring-control-circuit

Here are the BCM replacement instructions just in case. Check out the diagrams (below). Please let us know what you find. We are interested to see what it is.

I removed and reinstalled DRL relay and everything started working. I have another one ordered. So far so good thanks for the help.

Nice work, we are here to help, please use 2CarPros anytime. Let me know if the problem continues.