Norton Commando Wiring Diagram + Podtronics
I am in the process of adding a few different circuit diagrams to the site.
One of the most common upgrades or modifications for a classic british bike is to add a combined regulator/rectifier unit.
Our Commandos use a blue can capacitor, zener diode (which can be found mounted on the back of the z-plate) and rectifier unit.
A combined regulator/rectifier replaces all of these components with one package.
The most common manufacturer of these is Podtronics.
There are four wires to connect:
- Two Yellows – these are the AC input and pick up on the Green/Yellow and Green/White (connection can be any way round, as this is the AC side of the circuit)
- The Red – this is the Positive output and will join to the red wire if you are using existing wiring (it goes straight to the ground/earth of the frame)
- The Black – this is the Negative output (known as the hot wire) – it will pick up on the Brown/Blue wire (which goes via a fuse straight to the battery negative terminal)
Here is a factory wiring diagram with the Podtronics unit added into the circuit.
Pre-1971 (ammeter in the headlight shell and Wipac Tricon type handlebar switch) PNG 3066×1841
1971 (three wires to the master switch) PNG 3066×1841
1972 onwards (four wires to the master switch) PNG 3066×1841
1974 MK3 Early Bikes – there were around 2,000 bikes that were built around the December 1974 timeframe that have three additional fuses that can be found in the headlamp bucket.
These bikes are also wired with the old Lucas 3AW 3 wire ‘silver can’ assimilator.
1974 MK3 (Early) PNG 3066×1841
1975 MK3 this is the most common configuration, and takes us through to the final Commando that rolls off the production line.
1975 MK3 (Original) PNG 3066×1841
1975 MK3 Canadian Market – there were legal requirement in Canada around the headlamp being on while the engine was running, so the wiring diagram includes changes needed (swapping out the Warning Light Assimilator 06-6393 for the Headlamp Warning Unit 06-6392). Note that a different Master Switch is also required.
This is covered in the Factory Wiring Diagram, by notes.
1975 MK3 (Canadian Market) PNG 3066×1841
I hope these will be useful to someone!