To retain steering control in a car after changing the factory fit head unit two parts are required. Firstly the Steering Interface that is specific to the make and model of car and secondly a patch lead that matches the new head unit ie. a Pioneer head unit will require a Pioneer patch lead.
Autoleads PC99-KEN Patch Lead
Patch lead for Kenwood head units, to be used in conjunction with Autoleads steering interfaces.
