2007 NBS Silverado
- truck lights work fine
- plug into trailer, signal left or right and both trailer lights flash.
- tried diff trailer, same thing.
- Truck/trailer plug connectors are good.
- unplugged the connectors under the bed (back of 7 pin, 4 connectors at main block under bed). Big pin at back of 7-pin was a bit corroded, sanded down, cleaned out and greased. Same thing.
- nothing odd under there (ie. new damage that could’ve pinched wires)
Ideas? Pull loom and check all wires for cuts/frays/corrosion? Is there a specific ground at that rear block that I could check?
Thanks
