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Norton Commando

Updated 02/07/24

Norton Commando

Updated 02/18/24

Norton Commando

Updated 02/18/24

Norton Commando

Updated 02/18/24

Norton Commando
Head Stud Study

Updated 11/25/23

Norton Commando
Service Releases

Updated 06/13/22

Norton Commando

Updated 02/17/24

Used Parts For Sale
Updated 09/13/20

High Mileage 850
Updated 02/07/24

Customer Combat
Build Oct 23

Updated 02/17/24

Blue 69S
Updated 02/18/24

Norton Rear
Wheel Lacing

Updated 05/06/22

Norton Front
Wheel Lacing

Updated 10/22/21

Norton Front
Forks Helper

Updated 01/08/23

Norton Wiring
Updated 09/02/23

Norton Wiring Diagrams
Updated 02/28/21

Combat 5
Updated 02/07/24

Roadster 850
Updated 08/07/23

1973 Customer
BasketCase Build

Delivered 07/15/22

1974 Norton 850
Commando Rebuild

Sold 01/12/21
Updated 06/10/21

1974 Norton Wiring
Updated 11/21/21

1972 Norton 750
Commando Rebuild

Completed 05/15/19
First Place Norton 5/16/19
Sold 01/01/20

1972 Norton Wiring
Updated 09/06/20

Customer Combat
and 69S Builds

Closed 10/18/23
US Flag Saturday, February 24, 2024

I've already detailed the wiring of a 1972 and a 1974 Commando from scratch but until now, I didn't have a wiring diagram to match how I do them.  The diagram below is for all pre-MKIII Norton Commandos.  Since there are some subtle differences, for instance the taillight used, some notes are required that don't fit on the drawing.  Also, the drawing shows the grounding (earthing) as it is electrically, but a few notes are required. I'm happy to answer and questions - just all or write.
  • For the later (rectangular) taillight, I ground the turn signal stems using eyelets at the mounting point - see the two taillight pictures here.   For the older taillight, I add a ground wire to the turn signals themselves - see the first picture here.  Either method will work for either taillight.
  • Since the headlight is held to the fork ears on a Norton but the turn signal stems, I ground the headlight shell which grounds the turn signals.
  • If you want to use LEDs for the indicators, speedo/tach illumination/pilot light, it's not a problem but since the bikes is wired positive ground the connections to the indicators must be reversed.  If using the current Lucas indicators, this is not a problem since they have spade terminals.  If using the original sockets, then the wire colors will be wrong, but they must be swapped.  Unfortunately, the new Lucas indicators are a problem because they interfere with the back of the beam unit.  With careful bending of the terminals, you can get them to work - but just.  This is true whether normal bulbs or LEDs.  I'm working on a solution for this, but it's not ready yet.
  • If you use a standard bulb for the turn signal indicator (amber), you can use the diodes shown, but the standard wiring will work fine.  The diodes are required when you use an LED for the indicator. Look almost at the end here for more information.
  • Note that Norton swapped the left and right handlebar switches during 1972.  I find it silly to have the turn signal control on the right so I show it on the left as it was on the earlier bikes and on my Triumphs.  The wiring doesn't change to swap sides, you simply swap the wired consoles.
A member of the Access Norton Forum, Grant Tiller, has been making colored Norton wiring diagrams for some time now. He has kindly made a custom diagram to match the way I wire them. To see his other diagrams, look here.

GJM Pre-MKIII Wiring

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