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Re: Radio Console wireing
A decent auto repair manual for your 2003 Chevy TrailBlazer (such as Chilton's, Clymers, Haynes, etc...) with a complete wiring diagram should give you the color codes for the factory speaker wiring. You can probably find and copy the pages you need at your local Public Library too. Good Luck.
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If you are planning to install your radio, I recommend you purchase a wiring harness specific for your vehicle. All aftermarket radios are standardized in wiring colors. The harness will have the diagram to hook your radio to the harness. The problem with hardwiring a radio is the wiring colors don't match, and hooking it up wrong could fry your entire electrical system. You can find a harness at www.crutchfield.com Hope this helps.
I recommend you purchase a wiring harness specific for that vehicle instead of trying to hardwire it. You run the risk of frying your entire electrical system if you do. Wiring harnesses are about $7-$20. Plus, it takes the guesswork out of wiring. Visit www.crutchfield.com if you are looking for one.
Ok without you giving any detail as to what kind of car and the make and model or year im just going to try to give a general explanation.
Common wiring colors and what they do - Black- is always the ground wire. Always. This must either be connected to another ground wire or connected to metal, for the device to work.
Red - Red is always the power cord, always. This must be connected either to another red power cord or straight to the vehicle battery.
Im not sure what your referring too with "acc"
blue - antenna, this sends a signal telling the radio to shut off when the car shuts off, otherwise the radio would stay on all the time.
Yellow/pink/green/violet - are probably all specific speakers inside your vehicle and respond according to colors on the back of whatever you are trying to install.
**special note, there are tons and tons of different combination's of the colors and wires throughout the various automobiles in the world, it is easiest to check your manufactures website or handbook or manual to find out your vehicles wiring guides and colors.
I use a AA battery. Take a short piece of speaker wire, cut two pieces about 3 inches long, strip it on both ends. Use black electrical tape and tape one wire on each end of the battery. On the end not taped to the battery twist the wires so they don't fray out. Now when you pull out your factory deck you can use the battery across the two wires for each speaker lead, it will make a crackle sound letting you know which speaker you are on.
Unfortunately, even if you get the wiring sorted out, the Ford radio chassis does not fit in a GM - the mounting is entirely different. The wiring harnesses and colors are also entirely different. Maybe best to find a GM radio - most of the GM radios should fit and plug right in.