Mk3 instrument panel indicator bulb

Norton Parts Drawings - Genuine Norton Factory Parts - Commando Parts -

Andover Norton Parts are the only Norton spare parts in the market manufactured to original drawings, within the factory-approved tolerances, from the correct materials, and with the correct finish.
andover-norton.co.uk

andover-norton.co.uk

Motorcycle parts and spares for Norton motorbikes - Genuine Andover Norton Spare Parts - Andover Norton Motorcycles Parts - Original Andover Norton Parts

Motorcycle parts and spares for Andover Norton motorbikes: Andover Norton manufactures and supplies all Genuine Factory Spare Parts for Norton motorcycles built before 2002.
andover-norton.co.uk
 
The bulbs now sold by Andover Norton are not the same as what was original on the bike. They do fit and will work. The original bulbs were also used in HO scale model train accessories, such as street lamps and locamotive headlamps. Here in the USA, the model train folks refereed to them as wheat germ bulbs.
 
chaztuna said:
The bulbs now sold by Andover Norton are not the same as what was original on the bike. They do fit and will work. The original bulbs were also used in HO scale model train accessories, such as street lamps and locamotive headlamps. Here in the USA, the model train folks refereed to them as wheat germ bulbs.
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I recently replaced everything with these new ones . RGM lists LED replacements but sold out.
 
Five years ago I bought a box of 10 of those bulbs from a warehouse in Florida, USA.
I do not recall the name of the place but those 10 bulbs cost the same as one bulb here in Michigan. I think they were sylvania bulbs. Just google the bulbs you want and see if a warehouse in Florida comes up.
 
I would point out, the LED-Indicator light (Blinker) has to be "non polarity sensitive" otherwise It won`t worke for both directions. With normal LED ("polarity sensitive") the wiring has to be changed with two diodes.
 
Marcelx said:
I would point out, the LED-Indicator light (Blinker) has to be "non polarity sensitive" otherwise It won`t worke for both directions. With normal LED ("polarity sensitive") the wiring has to be changed with two diodes.
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Actually, the indicator bulbs don't need to be. Since the Mk III bulb holders are plastic, the bulbs are insulated from the positive ground system used on these bikes. You simply need to correctly wire the bulb [- to - & + to +] You are correct that the actual turn signal bulbs need to be non polarity sensitive.
 
chaztuna said:
Actually, the indicator bulbs don't need to be. Since the Mk III bulb holders are plastic, the bulbs are insulated from the positive ground system used on these bikes.
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Do you mean the console warning light bulb holders?
Yes, they are plastic and insulated from ground but the polarity across the warning bulb reverses according to which pair of indicators are flashing so the LED warning bulb has to be either "non-polarity sensitive" or, two diodes used.
 
cliffa said:
@1.8mm They are possibly small enough to be able to get two inside the body of the warning lamp (one for each circuit) so you could dispense with the need for diodes.
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They are on the way from U.K. now and I'll try the wiring with the integral in line diodes seeing as I don't comprehend this idea .
 
Torontonian said:
They are on the way from U.K. now and I'll try the wiring with the integral in line diodes seeing as I don't comprehend this idea .
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Look here:

"The other consideration is the turn signal warning lamp in the headlight bucket – with LED turn signals, the warning lamp needs to be wired with two diodes, and connected to earth"

granttiller.com

Custom Norton Commando Wiring Diagram (Bernie Kent) | Grant Tiller

Bernie Kent has a 1971 Norton Commando and has reached out as he is considering putting on indicators (turn signals) These were optional at the time, as they were not yet law in all countries - so they were on the Norton pricelist and were either factory fitted, or could be added as a dealer
granttiller.com granttiller.com
granttiller.com

Custom Norton Commando Wiring Diagram (Phil Baker) | Grant Tiller

Phil Baker has a MK3 Norton Commando that he is in the process of fitting LED warning lamps to. This is no problem at all - the only thing to watch out for is the polarity - an LED cannot be connected either way round like a filament lamp can. Turn Signal There is one
granttiller.com granttiller.com

To avoid the trouble look for "Non polarity sensitive Led" what I did

Marcel
 
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cliffa said:
@1.8mm They are possibly small enough to be able to get two inside the body of the warning lamp (one for each circuit) so you could dispense with the need for diodes.
Click to expand...
Got my 8 bulbs from U.K. . They have the tiniest diodes wired in . Plus the LED bulbs are SO tiny . Jennifer is super nice to do business with . Small Scale Lights . Model Train suppliers .
 
Torontonian said:
Got my 8 bulbs from U.K. . They have the tiniest diodes wired in . Plus the LED bulbs are SO tiny . Jennifer is super nice to do business with . Small Scale Lights . Model Train suppliers .
Click to expand...
Tested them today inside of the holders . Soft white . Incredibly bright for a bulb half the size of a grain of rice. So I'll be somehow affixing each of the 4 bulbs as low down as possible into their stock bulb holders , in an effort to reduce their intensity by distance from the colored lenses . I'll simply use silicone . Plus they light up cool and stay that way . Suspect they are for model train headlights .
No plans to go LED on the turn signals circuit flasher bulbs .
 

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