Hoping you all can help with a trailer wiring issue. I have a 2020 Silverado RST, and the lights are acting weird on my aluminum boat trailer. With the truck in park and the lights connected, if I use either blinker, both blinkers operate as if I'd turned on the hazards. However, if I put the truck in gear, the blinkers work properly on the truck, but the trailer lights are very dim, or won't work at all. I have the connector grounded to the trailer frame, and both lights grounded at the back of the trailer. I've connected them every way I know how, and could use some advice. All suggestions are very welcome.