Left Turn Signal Not Working on Curt Vehicle Wiring Harness for 2013 Ford Transit Connect

Updated 09/03/2013 | Published 08/30/2013

Question:

I purchased this harness for my Ford Transit here w/ hitch etc. After installation, everything worked properly except the left turn signal. I checked and it is not the trailer side harness as there is no power detected at the terminal on the vehicle side connector. The vehicles left turn signal works properly. Any suggestions? 2nd, taking a short trip the lights operated except for the left turn signal. Stopped for gas. Turned the ignition back on and no trailer lights at all. Connection was fine. No power at the vehicle side terminal. The next day before unhooking the trailer, started the vehicle and all the lights except left turn signal worked properly. Any suggestions?

asked by: Scott R

Helpful Expert Reply:

It sounds like an intermittent ground problem that is potentially causing both issues. What I recommend is to try moving the converter box ground to a different location. You may need to scrape away paint to get to bare metal for the best ground. Also make sure that the fuse in the power wire is fully inserted and that nothing is pinching any of the converter box wires. I have also included a link to troubleshooting wiring for you that should also help.

expert reply by: Michael H