13 tacoma pls help

Any clue how this happened
When i turn on my headlights it triggers the door locks and no headlights

 

Did this just magically start happening or have done any electrical mods lately?
Does cruise control still function?

 

Relay of some sort, maybe

 

My guesses.

1) Someone fat fingered a wiring job of some type

or

2) Squirrels/rat damage in the harness

 

To help the others out.
They may want to see this
https://www.tacomaworld.com/threads/multiple-issues-with-used-2013.721080/#post-25673769

Man. Like I said before, this isn’t going to be easy to figure out.
You’re going to have start tracing wires. And it probably won’t be fun.
I feel bad for you bud. You got screwed.

 

Mice

 

No, it’s worse than that.
See the link above.

FWIW,

OP, I think the signals to the door locks are Ground side signals to the ECU.
What doors lock? All of them or just one?

 

See if you have one of the head light fuses blown?
I asked because the door locks are operated off a ground signal.
If the fuse to the head lights is blown, this would make since why the door might be locking.

 

All of them doors locked it's starting to look like I have a bad ECU or pcm fried everything else and I've traced all twires from the cabin fuse box all the way back to the tail lights new fuel pump I'll be sure to get you some before and after pictures

 

Sorry, didn't catch you were the same poster that had that other pile-'o-mess like @TnShooter did.

The question you post here will very likely be cleared up in conjunction with resolving all that other mess.