Something like that, yes. //content.invisioncic.com/y282845/emoticons/smile.gif.1ebc41e1811405b213edfc4622c41e27.gif
So all aftermarket head units have the same connection on the back?
They won't all use the same exact harness that plugs into the rear of the aftermarket stereo, no. Each manufacturer would normally have their own plug shape and port type where it plugs into the back of the deck. IIRC Pioneer is now putting their RCA preamp outputs on their own harness/plug rather than these cables being permanently attached to the rear of the unit's chassis.
Having said that - each type of radio will have the same essential group of wires on the back of it.....
Red for power,
Black for ground,
Yellow (usually) for 12v constant,
Green,
Gray,
White, and
Purple for speaker outputs, either one or two
Blue wires for power antenna and outboard component (amp, EQ, crossover, etc) activation, most newer decks will have an
Orange wire that controls display dimming (when ya turn your headlights on the display on the aftermarket deck will dim slightly akin to the way the OEM radio does)
After that you may or may not have some additional wires this again being dependant on what kind of deck you end up with - cell phone mute activation, Kenwood eXcelon decks have a pinkish wire for amplifier B.M.S. control (this is a Kenwood eXcelon-specific feature) etc etc etc.
But the normal wiring as described above is applicable to pretty much any deck you might buy. Just match the stereo's harness to the adapter harness wire for wire, color for color (yes, there will likely be some on the stereo that the adapter does not have corresponding connections for) and once that's done just plug the adapter into your factory plug and viola! Done! //content.invisioncic.com/y282845/emoticons/biggrin.gif.d71a5d36fcbab170f2364c9f2e3946cb.gif