headlights/brake lights dont work after heater core replacement

[mustang_montana]

I replaced my heater core the other day and when I put everything back together my headlights and brake lights didnt work. Also my turn signals wont work, but the parking lights come on. Its not a fuse I checked them all. Any idea what the problem could be? Did I mess something up behind the dash? Thanks a lot!

 

[n0v8or]

What model year?
Did you check the fuses under the hood (assuming your model year has them)?
Does your center brake light work?
Do your hazard flashers work?

 

[Sbonnbonn]

I have the same issue, in a 2004 mustang. Yes the brake light in the middle on trunk works

 

[Sbonnbonn]

I replaced my heater core the other day and when I put everything back together my headlights and brake lights didnt work. Also my turn signals wont work, but the parking lights come on. Its not a fuse I checked them all. Any idea what the problem could be? Did I mess something up behind the dash? Thanks a lot!

Did you ever find the problem?