3-in-1, turn stock or custom turn signals into running lights, brake light and maintain turn signal function. Increases visibility at the rear of the motorcycle. Designed for security system fits H-D as well as earlier-style signal modules. Built-in load equalizer. Works with stock Factory turn signals. Runs with the smallest turn signals, even LEDs. Works on single-filament bulbs, including halogens. Runs multiple marker lights or turn signal. Comes with easy to follow diagram and instructions. Made in USA..1986-1990 fits H-D FLST Heritage Softail 1990-1996 fits H-D FLSTF Fat Boy 1993 fits H-D FLSTN Heritage Softail Nostalgia 1994-1996 fits H-D FLSTN Heritage Softail Special 1995-1996 fits H-D FXD Dyna Super Glide 1992 fits H-D FXDB-D Dyna Glide Daytona 1991 fits H-D FXDB-S Dyna Glide Sturgis 1992 fits H-D FXDC Super Glide Custom 1993-1996 fits H-D FXDL Dyna Low Rider 1994-1996 fits H-D FXDS-Conv Dyna Convertible 1993-1996 fits H-D FXDWG Dyna Wide Glide 1986-1990 fits H-D FXST Softail Standard 1986-1996 fits H-D FXSTC Softail Custom 1988-1996 fits H-D FXSTS Springer Softail 1995-1996 fits H-D FXSTSB Bad Boy 1996-1998 fits H-D XL1200C Sportster 1200 Custom 1996-1998 fits H-D XL1200S Sportster 1200 Sport 1986-1987 fits H-D XLH1100 1988-1998 fits H-D XLH1200 1986-1998 fits H-D XLH883 1986-1995 fits H-D XLH883DLX Sportster 883 Deluxe 1987-1998 fits H-D XLH883HUG Sportster 883 Hugger