|Wire Color||Stripe Color||Color Code||Where Used||Notes||Examples|
|Black||B||Ground on Negative Ground Machines||
Most machines are positive ground and have no black wires.
However, some harnesses (probably after-market) used black
instead of red!
On some Triumphs, the horn to ground was Black.
On Triumphs with a horn relay, the relay to horn wire was Black and the horn ground wire was also black.
|Black||B||Voltage Regulator Negative Output||PODtronics, Tri-Spark MOSFET, and most others|
|Black||Red||BR||Contact Breaker to Center Cylinder's Coil, Triples|
|Black||White||BW||Contact Breaker to Timing Side Cylinder's Coil, Twins/Triples||On singles, this is the Contact Breaker to Coil wire.|
|Black||Yellow||BY||Contact Breaker to Drive Side Cylinder's Coil, Twins/Triples|
|Green||G||Dynamo Field||Only on Magneto machines|
|Green||Black||GB||Stator Low Output (RM19), One Leg (RM24)|
|Green||Red||GR||Lefthand Turn Signal|
|Green||White||GW||Righthand Turn Signal|
|Green||Yellow||GY||Stator High Output (RM19), One Side (RM21), One Leg (RM24)||On Norton, also goes to the Warning Light Assimlator|
|Light Green||Brown||LGN||Turn Signal (Direction) Switch (Handlebar) common to Flasher Unit|
|Brown||Black||NB||Horn button to horn (See PB Below)||Triumph "usually" used this for the horn. Some used PB|
|Brown||Green||NG||Taillight, Pilot Light, Speedo & Tach Illumination|
|Brown||Blue||NU||Battery to Ignition Switch if no Ammeter or Battery to Ammeter and see NW|
|Brown||White||NW||Ammeter to Ignition Switch||I use 14 gauge wire for this and NU|
|Purple||Black||PB||Horn button to horn (See NB Above)||As far as I know, this color was always used on Norton|
|Red||R||Ground on Positive Ground Machines||Some harnesses replaced this with black, but that is not common.|
|Red||Black||RB||Lighting Switch to Pilot Light||On later bikes, this was changed to Brown/Green so the pilot light was on whenever the tail light was on|
|Red||Green||RG||Oil Pressure Switch to Oil Pressure Indicator (Red)||Triumph before KE00001, after see WN|
|Blue||U||Light Switch (Headlight) to Dip Switch (Handlebar)||Some Norton harnesses also use Blue instead of the Blue/Yellow from the headlight switch to the ignition switch|
|Blue||Red||UR||Dip Switch (Handlebar) to Dip (Low) Beam|
|Blue||White||UW||Dip Switch (Handlebar) to Main (High) Beam|
|Blue||Yellow||UY||Ignition Switch to Headlight Switch||
Some Norton harnesses use Blue for this instead.
On Triumph, to stop confusion I use this from the switched side of the ignition switch to pin 4 of the 3-position headlight switch. Some Triumph diagrams have it as NB and some as NW - in either case that is confusing because they are primarily on the "hot" side of the switch.
|White||W||"Hot" when the igniton is on.||Goes to each handlebar console, the brake switches, and if no kill button, the coils. See WY|
|White||Black||WB||Contact Breaker (Distributor) to Ignition Coil||Only on Magneto machines. Note: The Norton MKIII workshop manual wiring diagram incorrectly shows this instead of Black/White as the timing side contact breaker to coil wire.|
|While||Green||WG||Stator Common (RM19 & RM24), One Side (RM21)||On Norton MKIII this also goes to the Warning Light Assimulator|
|White||Brown||WN||Warning Light Assimulator to Charging Indicator (Red)||This is standard for a Norton but I remove the assimulator and install an oil pressure switch connected to this wire.|
|White||Brown||WN||Oil Pressure Switch to Oil Pressure Indicator (Red)||Triumph from KE00001 on|
|White||Purple||WP||Ballast Resistor to Ignition Coils||Norton|
|White||Red||WR||Starter Switch (Handlebar) to Starter Selenoid||Norton MKIII, Triumph T160|
|White||Blue||WU||Under tank junction to ballast resistor||Norton, See WY|
|White||Yellow||WY||Engine Kill (Handlebar)||Triumph Twins/Triples when no balast resistor is used: To coils. Norton Commando, Pre-MKIII: To junction under tank where it connects to the White/Blue which connects to the balast resistor. Norton Commando MKIII: To the balast resistor.|
|Yellow||Y||PODtronics single or three phase input from stator|
|Yellow||Y||Dynamo Output||Only on Magneto machines|