I want to install my pioneer HU in my focus, which doesn't have sync or factory subwoofer. My question is, do I need the FDSR CAN Bus Interface, or can I just use an older model ford wiring harness? I'm not concerned about losing the info on the standard display, i.e., clock, temp, and I do not have steering wheel volume controls. Will I lose reverse lights, parking brake illumination, etc? I've installed many HU's, but this is my first time dealing with a vehicle that has this specific (data?) interface. Also, I believe I have to run a separate switched wire for accessory turn on? and remote wire for a sub amp? Any help is greatly appreciated.