Taillights not working

2006 MERCURY MONTEGO

150 MILES

ITWKURT

MEMBER
1 POST

Bad braking and regular taillight mode. Replacement assembly prohibitively expensive (even used). Can the much cheaper five hundred assembly be used or is wire harness different (my car has an LED device)?

Jun 25, 2018 at 7:20 AM

STRAILER

✓ASE Certified Mechanic
54,832 POSTS

There is a #18 fuse and tail light relay inside the smart junction box that needs to be checked. Here is a guide the help you get started and the wiring diagrams so you can see how the system works:

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 fuse panels identification and location.

Check out the diagrams (below). Please run some tests and get back to us.

Cheers, Ken

Images (Click to enlarge)

Professional Diagram for 2CarPros Members
Click here to log in and view diagram.

Jun 26, 2018 at 3:37 PM