Factory tow package, plug 4 or 7 pin trailer plug in ,brake and turn signals work no tail lights. 2 different trailers, one with led, one with filament bulbs. Going from autoheadlights to manual no effect. Dealer scanned with plug in scanner on receptacle, says works. Pull my 2020 F250 with the trailer to the dealer, show working lights on the trailer, park the bronco next to the f250, hook up the trailer no tail lights. Put a set on portable lights directly grounded to the vehicle work on...
Factory Tow package, no tail lights on trailer
Factory Tow package, no tail lights on trailer