Car Wiring Harness

Car wiring harness color codes by country

The car wiring harness is like the blood of a car, but its function is complex. When assembling and servicing, you must know the colours of the wires in a harness. The colours have specific rules and meanings. So today I’ve compiled a list of car wiring harness color codes by country for you to utilize when needed.

American car wiring harness color code

AbbreviationEnglishAbbreviationEnglish
BkBlackBuBlue
BNBrownCRClear
Dk BuDark BlueDk GNDark Green
GNGreenGYGray
LT BuLight BlueLT GNLight Green
OGOrangePkPink
PLPurpleRDRed
TNTanVIViolet
WTWhiteYLYellow

European automotive wiring harness color codes

AbbreviationEnglishAbbreviationEnglish
BLBlueBRBrown
ELGreamGEYellow
GNGreenGRGray
MMaroonNFNeutral
OGOrangeRSPink
RTRedSWBlack
VIVioletWSWhite
HBLLight BlueHGNLight Green

Japanese car wiring harness color code

AbbreviationEnglishAbbreviationEnglish
BBlackWWhite
RRedGGreen
LBlueYYellow
LGLight GreenBRBrown
OROrangePPink
PuPurpleGYGray
SBSky Blue

China car wiring harness color code

AbbreviationEnglishAbbreviationEnglish
BBlackOOrange
WWhiteYYellow
GrGrayGGreen
BrBrownBlBlue
RRedVViolet

FAQ

1, How can I identify the wires in my automotive wiring harness?

The easiest way to identify wires in an automotive wiring harness is to look for a colour code. The code is usually printed on the insulation of the wire. If you can’t see the colour code, a multimeter can measure the voltage or resistance of this wire.

2, Can I rearrange pre-existing wiring according to the car wiring harness colour code?

If you are modifying existing wiring, it is highly advisable to follow the wire harness colour code. Doing so means that:

  • Maintenance Simplified: Technicians can quickly identify and trace wires when they are all the same colour, which makes maintenance repairs easier.
  • Effective Troubleshooting: The use of a consistent colour code makes it easier to identify and solve wire problems.
  • Modification in the future is easier: With consistent wire colour codes that exist between existing wiring, changes are simplified.

3, Are there differences between GM and Ford wiring color codes?

Yes, there is a difference between GM and Ford wiring colour codes. Each automobile manufacturer usually uses its colour codes for wiring systems in their vehicles. While there may be some similarities, for instance, both using black for ground wires, there are other colours which indicate different circuits and components on different cars. To ensure that the wires can be accurately identified and connected, it is very important to refer specifically to the wiring diagram or documentation for a particular vehicle.