HELP Key Fob and Headlights don't work without key

2019 TRD OR MT. So I did some simple maintenance on my rear view mirror, which included unplugging the auto dimmer connection. After putting it back together, im having electrical issues now. Basically, I can't lock my doors or do anything that I could normally do with the key out. For example, normally I can turn the hazards or headlights on without a key in the ignition, but now it's totally dead without a key turned to the 2nd or 3rd positions. It functions normally with a key in. No battery issues. Any thoughts? I had to go manually lock all of the doors by hand. I checked all of the fuses and can't find any blown ones. So random.....

Edit: I found a thread on this topic.

 

Have you tried disconnecting the battery for 15 minutes, reconnecting, and try again?

 

BCM is most likely damaged. You will have to get it replaced and reprogrammed by the dealer.

 

Ended up being a 10A fuse under the hood (ECU-B No.3). For some reason my multimeter said it was good when, upon removal, it clearly was blown. All good now. Thanks.

 

That's good. At least you don't have to go through the dealer for BCM service order.

 

Glad you found it, and had no damage. A good reminder to disconnect battery before working on electrical.