Troubleshooting Trailer Lighting When Connected to 2019 Chevy Silverado 3500

Question:

I have a 2019 chevy 3500 pickup and plug lights in and no clearance lights come on trailer at all. the left blinker will blink but causes the right to blink with all the clearance lights and the right blinker does nothing at all

asked by: Jesse

Expert Reply:

It sounds like you have a bad ground connection or some corrosion on your trailer side of the wiring. Since the vehicle you are using is a brand new 2019 Chevy Silverado 3500 I would be very surprised if the issue was on your vehicle side of things. You can easily confirm this by either connecting your trailer to another vehicle to see if the problem persists or use a circuit tester like part # PTW2992 to test the functions on the 7-Way of your Silverado (see attached).

Looking at the trailer side start off by making sure the connector is clean and free of corrosion and debris. If that looks good then the next step is to check your main ground connection as well as the grounds for all of your lights. Make sure that they are securely connected to a clean bare-metal surface as even some paint can cause issues.

Let me know if you are still having problems and I can help you look into it further.

expert reply by: Jon G