Do you ever think that we should learn about radio wire color codes?

I never thought that until about a month ago, when my mother asked me to fix her old car radio. I did not remember precisely how I reacted but the whole process was a disaster.
The reason was I did not know which wire should be hooked up in another; or more precisely, I could not recall any of radio wire color codes. And it didn’t have a harness as well, which made the wires even more confused and everything went ultimately messed up. Therefore, it took me a half of the morning to finish the job and help my mother have brand new cables.
It was not a difficult job but truly made me realize how important we needed to remember wire color codes. And I know that many of people, including you, have not discovered why we need to know about them and what the feature of each wire is. So in this article today, I will show you the most basic things you need to know about them. If you are having any problems just like mine, I believe it would help you.
1. What are the wires color codes?

Some basic codes are approved in many countries and almost all of brands of cars and radios. I will mention about some different codes other vehicles in the next parts. For now, you won’t need to wonder if there would be any distinctions in each type.
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- VERSATILE WIRE STRIPPER AND CUTTER: For stripping and cutting on 10-20 AWG solid, 12-22 AWG stranded, and 12/2 and 14/2 Romex cable (all sizes) and other nonmetallic (type NM) sheathed cable
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- Holes for looping and bending wire
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Following table and installing your radio won’t be such a hard work anymore
You can watch this video for more explanation:
2. Why do we need them?

We need the wire codes mostly for emergencies. My situation is one example, which I needed to repair my mother’s aftermarket radio and didn’t want to waste time searching Google. Learning the functions of each wire saved me quite a lot of money for technical guys, who never undercharge. And if you memorize them, you won’t need so much time like me to find out which wires need being connected with each other. The entire installing process would be very smooth and comfortable.
Besides, you will also know why we need different color codes if you discover a little about their origins. I guess hardly anyone knows that the wires did not have as many colors as they are now. The original ones started being used when Thomas Edison commercialized light bulbs more than a century ago, which were only made with three basic colors: Black, Gray, and Red. Radio wires were invented about 50 years after that and could not avoid being made with the same format.
- PREMIUM SPEAKER WIRE [ Frosted Red/Black | 100-feet (30.5m) | 16 Gauge ] - Featuring a double conductor, this stranded wire is constructed from high-grade copper and aluminum. It is perfect for achieving outstanding audio performance, exceptional flexibility, easy stripping and great polarity identification.
- COPPER-CLAD ALUMINUM (CCA) - Made with an aluminum core and coated with a layer of copper, this cost effective speaker wire provides great conductivity with minimal signal loss.
- PERFECT FOR - Designed to provide adequate performance for any home theater system, car audio speakers or professional studio. It's a great choice for both DIY enthusiasts and professionals.
- SIMPLE INSTALLATION - Use this wire to easily connect your home theater or car audio speakers to any A/V receiver or amplifier.
- SOFTFLEX JACKET - Our wire is shielded with a soft and flexible jacket, which not only provides a great appearance, but also ensures maximum durability and easy installation.
- TUOFENG Solid Single Core Wire 1007 22 AWG Hook-Up Wire: Solid tinned copper conductor with a PVC sheath.
- Solid Hookup Wire Good abrasion resistance and resistance to substances such as oil,solvents and chemicals: PVC Insulation that can withstand heats of up to 80 degrees C.
- 22awg Solid Wire Easy handling,stripping,and termination: Low-fray design.
- Insulation: PVC .010".Voltage Rating: 300 Volts,Flame retardant: VW-1.
- 22awg solid wire :6 different colored 30 Feet / 9 M spools :Red, black, green, yellow, blue, white,tinned copper wire
- IN THE BOX: 16 gauge speaker wire cable (50 feet)
- CLEAR AUDIO: Plastic jacket helps ensure high-quality undistorted signals to and from audio equipment
- CONVENIENT: Connects audio speakers to an A/V receiver or amplifier
- SIMPLE INSTALL: White line on one side of wire indicates the polarity for a proper audio system set up
- EASY DISPENSING: Comes wrapped around a hard plastic spool for simple dispensing
- 【High Quality Speaker Wire】Askcable professional grade speaker wire audio cable designed for custom installations. 100 feet of 18 gauge speaker wire ideal for speaker Installations. The lower the gauge number, the thicker the wire. Thicker wire presents less resistance to current flow
- 【Save Installation Time】Only one cable to run.Ultra-flex outer jacket for maximum flexibility, use this Speaker Wire to pair with banana plugs, spade tips, or bent pin connectors to connect your speakers to A/V receiver or amplifier with this Askcable Speaker Wire
- 【Perfect Performance】Speaker Wire operating temperature rating of -20℃ of 70℃ respectively. The jacket material is flexible and environmental friendly PVC, which can be twisted and extended it freely as you like
- 【Easy Polarity Identification】This two color jacket allows for easy polarity identification. Allows free, wide and seamless adjustment of the required physical properties of this wire such as flexibility, elasticity, and impact resistance
- 【Advantage of Copper clad aluminum】CCA wiring provides a good conductor for transmitting audio, ensuring high fidelity sound quality and providing maximum's conductivity and durability without paying the additional cost. The product go through many states of testing to ensure the highest performance and reliability
- FROSTED BLUE/BLACK 14 GAUGE SPEAKER WIRE 100 FT (30.5m) - The lower the gauge number, the thicker the wire. Thicker wire presents less resistance to current flow.
- OPPER CLAD ALUMINUM (CCA) - CCA wiring provides a good conductor for transmitting audio. This is the most economical option when choosing speaker wires to use as radio wires or car audio speaker wire.
- RUGGED PVC JACKET - Allows free, wide and seamless adjustment of the required physical properties of this wire such as flexibility, elasticity, and impact resistance.
- EASY POLARITY IDENTIFICATION - This two color jacket allows for easy polarity identification. Making a polarity mistake could be damaging to your audio equipment.
- SOFT TOUCH JACKET - The jacket on our cable is designed with the installer in mind. The flexibility of this jacket allows for easy routing and has a low memory.
- Connects to the factory stereo harnesses when installing an aftermarket stereo
- Not compatible with factory amplified systems
- Direct Connection to the factory harness without cutting any wires
- Manufactured with factory quality wire and Connector / Wire Harness for Aftermarket Stereo Installation with Color Coded Wires
- EIA industry standard color coded wires for an easier installation
- Plugs Into Car Harness At Radio
- Powers 4 Speakers
- Great For All Your Needs
- Easy To Use
- 30-FEET (9.14m) RED/BLACK 12 GAUGE SPEAKER WIRE - The lower the gauge number, the thicker the wire. Thicker wire presents less resistance to current flow.
- COPPER CLAD ALUMINUM (CCA) - CCA wiring provides a good conductor for transmitting audio. This is the most economical option when choosing speaker wire. Great use for car speakers stereos, home theater speakers, surround sound, radio, and more!
- RUGGED PVC JACKET - The rugged PVC jacket of this speaker cable wire allows free, wide, and seamless adjustment of the required physical properties of this wire, such as flexibility, elasticity, and impact resistance.
- EASY POLARITY IDENTIFICATION - This two color jacket allows for easy polarity identification. Making a polarity mistake could be damaging to your audio equipment.
- SOFT TOUCH JACKET - The jacket on our cable is designed with the installer in mind. The flexibility of this jacket allows for easy routing and has a low memory.
- 12 Gauge stranded Copper Coated Aluminum CCA Red/Black bonded Zip Wire that pulls apart easily
- Automotive Grade "GPT" PVC insulation. Oil & gas resistant. Temperature Range: -40 deg F to +176 deg F
- Comes conveniently in a spool roll. Perfect for Radio, Stereo, Home Theater, Robotics, R/C
- NOTE: This is NOT oxygen free copper (ofc) wire and is not based on AWG (American Wire Gauge)
- Alternative to OFC copper wire. Achieves 80% conductivity.
- Plugs into car harness
- Power/4 Speaker
- 20-Pin plug
- Allows for the installation of an aftermarket radio using the existing factory wiring and connectors
- For 1998 Honda, connect power and 4 speakers
Therefore, if you ever find a radio with one three colors that I have mentioned above, you should not use it. I’m sure it was made over 30 years ago and would not meet any electrical safety requirements that are set up at the present.
Car Stereo Wiring Explained In Detail
3. Some other color codes
BMW Cars:

Wires | Colors | Functions |
Power cable | Violet | Control the switch, which turns the radio on and off |
Ground cable | Brown | Connect your radio desk with amplifier and adjust the current |
Constant Power Cable | Gray with stripe Red | Keep the battery in stable condition |
Amp turn on wire | White | Work as an antenna and adjust the signal |
Illumination | White with stripe Blue | Increase the light of the radio screen |
Dimmer | Not used | |
Speaker wire | Gray with stripe Red | Front left speaker |
Speaker wire | Gray with stripe Violet | Front left speaker |
Speaker wire | Gray with stripe White | Front right speaker |
Speaker wire | Gray with stripe Brown | Front right speaker |
Speaker wire | Black with stripe Red | Rear left speaker |
Speaker wire | Black with stripe Violet | Rear left speaker |
Speaker wire | Black with stripe White | Rear right speaker |
Speaker wire | Black with stripe Brown | Rear right speaker |
Ford Cars:

Wires | Colors | Functions |
Power cable | Yellow with stripe Black | Control the switch, which turns the radio on and off |
Ground cable | Black or Red | Connect your radio desk with amplifier and adjust the current |
Constant Power Cable | Green with stripe Yellow | Keep the battery in stable condition |
Amp turn on wire | Blue | Work as an antenna and adjust the signal |
Illumination | Orange | Increase the light of the radio screen |
Dimmer | Orange with stripe White | Decrease the light of the radio screen |
Speaker wire | Orange with stripe Green | Front left speaker |
Speaker wire | Light Blue | Front left speaker |
Speaker wire | White with stripe Green | Front right speaker |
Speaker wire | Green with stripe Orange | Front right speaker |
Speaker wire | Pink with stripe Green | Rear left speaker |
Speaker wire | Pink with stripe Blue | Rear left speaker |
Speaker wire | Pink with stripe Blue | Rear right speaker |
Speaker wire | Green with stripe Orange | Rear right speaker |
Mazda Cars:

Wires | Colors | Functions |
Power cable | Blue with stripe White | Control the switch, which turns the radio on and off |
Ground cable | Black | Connect your radio desk with amplifier and adjust the current |
Constant Power Cable | Blue with stripe Red | Keep the battery in stable condition |
Amp turn on wire | Blue | Work as an antenna and adjust the signal Some wires need a relay due to a negative terminal trigger |
Illumination | Red with stripe Black | Increase the light of the radio screen |
Dimmer | Not used | |
Speaker wire | Blue | Front left speaker |
Speaker wire | Blue with stripe White | Front left speaker |
Speaker wire | Blue with stripe Red | Front right speaker |
Speaker wire | Blue with stripe Orange | Front right speaker |
Speaker wire | Blue with stripe White | Rear left speaker |
Speaker wire | Blue with stripe Green | Rear left speaker |
Speaker wire | Blue with stripe Orange | Rear right speaker |
Speaker wire | Blue with stripe Black | Rear right speaker |
Conclusion
Regardless, thank you for reading my article about radio wire color codes. I hope you have had a great time with it and if you have any opinions or questions, do comment. I would love to reply. Goodbye, and I look forward to see you in my subsequent writings.