Car stereo wire harness. Plugs to the factory radio connectors. Use to connect an aftermarket radio. Compatibility Notes: Will not work with premium factory amplified systems like JBL, Synthesis, etc. or any external factory amp. Compatible Vehicles: No external factory amplifier vehicles: Made for Ford: 1986 1987 1988 1989 1990 1991 1992 1993 1994 1995 1996 1997 1998 F-150/F-250, 1986-1998 Mustang