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Someone gave me a Pioneer DEH-2700 head unit and didn't have any of the manuals. I have a 2007 Chevy Cobalt How to I install this unit into my car. I don't know which wires go to what or anything

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The easiest way to do ANY car stereo head install is to first: buy a volt meter tester. pull the old stereo out and look for the yellow (constant current from battery) and isolate it so as not to cause a short circuit or blow a fuse (tape it so it doesn't touch any metal part of the car chassis) second: locate the Red wire (switch/ignition key connector) and isolate it too and last: the ground cable (black, no need to isolate it) turn on your volt meter in the 20 range position, connect the black cable from the meter to the black wire of the car (ground) and the red cable from the meter to the yellow wire of car and if it is the right yellow wire, it should give you a voltage of 9-12 volts result. This yellow wire its always (constant current) connected to the battery so as to keep any memory settings on the stereo head unit (like time, settings, stations, etc..) if it doesn't, then find any cable/wire that will do this with the IGNITION/KEY-OFF of the car and this should go to the also YELLOW wire of the head unit. Now take the volt meter RED cable and connect it to the RED wire (key switch/ignition) and it should not give you ANY voltage while the car is turnoff. Key ignition your car and as soon as you switch the car to ON (before your engine starts) then it should read EXACTLY 12 plus (12.47 or more) that's your wire that it gets connected to the RED wire of the head unit to turn the radio/stereo head unit ON. There may be other wires coming out of the same harness as the RED, YELLOW AND BLACK from the back of the head unit, like an Orange/pink wire which in older units provides Illumination and a DARK BLUE labeled ANT/REM which turns the AUTO ANTENNA ON, also another wire labeled AMP/REM which send an ON SIGNAL (switch) to any amplifier connected to the head unit (it does the same function as the RED wire from the car ignition cable that turns the AMPLIFIER/RADIO ON as soon as the key is turned ON) other wire such as a LIGHT BLUE OR GREEN which might be labeled ATT OR PHONE is to provide interruption to the head unit when a phone call comes through. THE REST OF THE WIRES should come IN PAIRS (almost always 4 sets) of the same color EACH with one of them (example: grey and grey with a BLACK line) which are your speaker connectors, like the grey above which would be connected to the POSITIVE terminal of the speaker and the grey/black to the GROUND. If these wire do not come in PAIRS, DO NOT CONNECT THEM to ANY of the speakers which would cause to blow/burn them out!! If your head unit comes with RCA/COAXIAL speaker out/ sub out/ labeled REAR/FRONT AND SUB, then they do the same function as the speaker wire pairs but with RCA CABLES that connect directly to any amplifier or crossover unit. Hope this helps. Phoenix One.

Posted on Nov 18, 2013

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The easiest way to solve this issue is to buy a wire harness for your car this will make the install alot easier. Its already color coded for your wires, so head out to your local installer or try best buy you might also need a stereo kit. Email me with questions on installs.

Posted on Jul 25, 2008

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