These are drop in replacement marker lights for the 2015+ F150 new style Ford tow mirrors or 2017+ F250 or F350 Superduty. There is a single color amber only version, as well as a switchback version where it will be a white running light and change to a flashing amber signal. They are offered with a smoked or clear lens

• Signal: Flashing Amber Signal on side 2 LED's (unless Boost Auto dual function harness is installed)
• Running Light (No Signal): Sold Amber Strip Light (side 2 LED's not illuminated)
• Running Light On & Signal Activated: Solid amber strip on front. 2 LED's on side flash with turn signal (unless Boost Auto dual function harness is installed)
• These replace the factory lights which are part numbers FL3Z-13B375-CA & HC3Z-13B374-A & HC3Z-13B375-A & FL3Z-13B374-CA