The 16pin iso stereo adapter only works for partial universal car stereo with 16pin socket, 8 and 8 pin, not with Pioneer,Boss,JVC,Alpine headunit. 1 x 24Pin Stereo Wire Harness Kit. Wiring Harness for Ford Car Stereo: 16 pin iso stereo connector directly to 24pin factory radio adapter, fit for universal car CD audio video receiver, quick connection and installation, Picture 3.