Trailer Turn Signals Not Working with 2015 Chevy Traverse with 7-Way Connector Installed  

Question:

Expert Reply:

The trailer connector you purchased, # 118271, is designed to fit if your 2015 Chevy Traverse came with a factory tow package. If it did not come with the factory tow package then it is possible that some functions will not work.

I checked the owner's manual for the 2015 Traverse and apparently in the under-hood fuse box there are 2 fuses each for trailer turn signal/brake lights. Two of them are labeled LT TRLR STOP/TRN and the other two are labeled RT TRLR STOP/TRN. You can check those fuses.

But the fuses have both the brake light and turn signals on them so, in other words, if it was a fuse then neither the turn signal nor brake light would work.

It is possible that the issue is on the trailer. The first thing you can do is test the newly installed vehicle side connector using a circuit tester such as # PTW2993 while someone goes through the lighting functions in the vehicle. If everything works, then then issue is on the trailer.

If the issue is on the trailer, it is likely a ground problem. Ground problems normally show up when there is more draw on a system such as when you have the running lights on and then use another function like a turn signal or brake light but can show up any time.

Make sure that the vehicle side and trailer side connectors are clean and free of corrosion inside and out. The main connector grounds should be attached to clean and corrosion free bare metal surfaces.

The light grounds should also be attached to clean and corrosion free bare metal surfaces. If there is anything between a light ground and the metal trailer frame or if the trailer has an aluminum frame, tilt bed, or folding tongue, any of these things can interrupt the ground. Running jumper wires from the light grounds to the main trailer connector ground can help.

expert reply by: Michael H

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