Headlight Switch. This part generally fits Ford vehicles and includes models such as Mustang with the trims of Base Convertible 2-Door,Base Fastback 2-Door,Base Hardtop 2-Door,Base,Boss 302,Boss 429,Grande,Mach 1 Fastback 2-Door,Mach 1 Hardtop 2-Door,Mach 1,Shelby GT-350,Shelby GT-500,Shelby GT-500KR.