Plug and play adapter for SUBARU amplifier with turn on wire1、Fitment: Replacement for GEO Prizm 1989‑1992; Replacement for ES250 LS 400; Replacement for SCION FRS; Replacement for FJ Cruiser; Replacement for RAV‑4. 2、Description: If this is installed in a vehicle with a premium sound system, this harness may need to be connected to the amplifier rather than directly at the radio. 3、Simple to Use: Sound volume to the amplifier can be adjusted by the dials on the harness. Easy to install and easy to operate, convenient adapter interface. 4、Multicolor Wires: The remote wires coming off the harness can be used in a variety of wire colors. Regardless of the color, rest assured that it is suitable for remote opening of the amplifier. 5、Durable ABS: Amp adapter interface is made of premium ABS material, abrasion resistant, anti aging, sturdy and durable, long service life.