Trailer brake warning

Hi, this is Bo, an auto expert on RepairPal's Car Genius team! First off, you may be able to take it to the dealer if the truck comes equipped with a towing package. It may be under the manufacturer's warranty still. Since you've already replaced the connector and the trailer brake controller, the issue may lie in the wiring harness or the trailer itself. Check the trailer's wiring for any shorts, frayed wires, or loose connections. Also, ensure the ground connection is solid. Sometimes, a software update for the truck's towing module might be necessary to sync with the new controller. If the problem persists, consulting a professional mechanic specializing in towing systems could help diagnose and resolve the issue effectively. If you have any other questions, please call us at 877-913-1554! We'll gladly find you a certified RepairPal shop in your area!