Metra 70-5521 Radio Wiring Harness for Ford 03-Up Amp Factory amplifier integration harness 2 RCA Plugs plug into aftermarket radio's pre-amp outputs One 24-pin power plug and one 8-pin subwoofer plug.Includes Ford Lincoln and Mercury 2003-2005 Turbowire and a 8-pin harness with a pair of RCAs for the OE woofer(s) 1.5K Ohm resistor can be used on the amp-remote wire to eliminate turn-on pop Allows for the installation of an aftermarket radio using the existing factory wiring and connectors