There are a lot of wiring harnesses on the car, I was wondering if anyone knows which one the horn and headlights are connected to. I need a new harness and can't figure out from the diagrams which is the correct one to order.

 

According to the service manual the horns and left (driver side) headlight are connected to the left engine compartment wire harness and the right (pass. side) headlight is connected to the right engine compartment wire harness.

Both harnesses are pretty extensive and pass through the firewall to connect to a bunch of stuff behind the dashboard.


EDIT: Based on comparing the service manual diagrams to the parts diagrams on bernardi parts, it looks like the ones you want are probably "WIRE HARNESS, L. CABIN" under WIRE HARNESS (1) and "WIRE HARNESS, R. CABIN" under WIRE HARNESS (3). That's based on a '12 TL Tech Auto though so YMMV depending on your year/model.

 

Mine is a 2012,

Thanks for the help