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Message: <blockquote data-quote="bmcgc" data-source="post: 1437040" data-attributes="member: 20733">Im putting a double din single CD from a 04ish Expy in my 97 Cobra vert and doing a 01+ console swap at the same time.Ive got some wiring questions on this swap that I will put in separate threads.Im well aware that the oem HUs are crap, but I want a factory appearance and between this car being a vert and the exhaust I cant hear crap anyway.I rarely listen to the radio.This car originally had a Mach system.  When I bought it, it had a crappy looking Sony HU and a cubby that wasnt made for a Mustang.I have the necessary bezels, radio and the plugs I cut out of the car when I pulled the radio.My plan is to replace the speakers and run new wires for them, add a FM modulator for bluetooth, and maybe a mini amp.Questions:The new HU has 2 plugs.  I figured out the wiring, but I dont think all the wires are necessary.The square plug has two wires:  gray/black for vehicle speed and yellow for airbag.  Can I omit this plug altogether?The flat plug has everything else:gray/yellow - hot in start:  What is this for?red/black - lights interior:  Is this illumination, there isnt another wire for illumination.white/yellow -  constant power:  Is this for memory?I would like to remove the amps and any wiring that i can from the Mach unit or at least unhook them from power.  Is this possible?Lastly:  Im going to run component speakers in the doors and would like to run woofers in the rear boxes.  Can I squeeze a 8in sub in the box?Thanks</blockquote>