Troubleshooting Lights After Installing 4-Way on 2014 Ford Fusion

Published 05/14/2018

Products Featured in This Question

Hook Probe Circuit Tester

(65)

$12.94

Curt T-Connector Vehicle Wiring Harness with 4-Pole Flat Trailer Connector

(78)

$69.93

Question:

This is more the question, I was sold the version for 2016-2018 and my car is a 2014. The one I should have been sent is Curt#56351 and not the 56302. Is there anything I can do to make it work? It's already fully installed and quite a pain to remove. Hope there is a modification I can make.

asked by: Christopher B

Expert Reply:

It is likely the result of a bad ground, but in order to determine the specific problem you'll need to use a circuit tester such as # PTW2993 to test the connector on your Fusion after disconnecting it from your trailer. Check the wiring going into your harness from your taillights to see if those wires are carrying the correct signals, if not then the issue is with the vehicle wiring. If the signals going to your harness are okay, you'll need to test the signals coming out of the harness, and if they are correct then your issue is likely going to be with the trailer side wiring.

An important issue you will want to take a look at are the ground connections, as they can be the cause of numerous lighting problems. You'll want to make sure your grounds are securely attached to bare metal surfaces free of any paint, dirt or corrosion of any kind. Also check your wiring thoroughly to ensure there are none that are crimped, broken or otherwise damaged. I've added links to a pair of help articles on trailer wiring that you may also find useful.

expert reply by: Kyle S

Christopher

5/14/2018

Kyle S.

5/14/2018

There is not a modification to be made which will allow Harness C56302 to work in a 2014 Fusion; you are going to need to install Harness # # C56351, which is a fit for S, SE and Titanium models of your '14 Fusion.