Flashing neutral light

TonyA · Jul 22, 2018

That is Good !

Sdonders · Aug 23, 2018

Hi all,

Question about the patch lead. My fuel light flashes also especially at low rpm. Is this also solvable with this patch lead.
And is the patch lead not only a pull down resistor removing the impedance voltage buildup in the wiring from other high voltage wires?
Or is the source be something else?

Sjoerd

Rob Jameson - Norton UK · Aug 23, 2018

Sdonders said:
Hi all,

Question about the patch lead. My fuel light flashes also especially at low rpm. Is this also solvable with this patch lead.
And is the patch lead not only a pull down resistor removing the impedance voltage buildup in the wiring from other high voltage wires?
Or is the source be something else?

Sjoerd

The same patch lead is used, but for a different purpose and position on the bike. It runs from the fuel light relay to one of the battery terminals.

The source of the neutral light flicker is electrical noise between higher voltage wires, I don't know regarding the fuel light patch.

Sdonders · Aug 23, 2018

Rob Jameson - Norton UK said:
The same patch lead is used, but for a different purpose and position on the bike. It runs from the fuel light relay to one of the battery terminals.

The source of the neutral light flicker is electrical noise between higher voltage wires, I don't know regarding the fuel light patch.

Hi Rob,
Thanks for your quick reply. Indeed what I thought. I will check this out, I remember that there might be already such a lead. Maybe for the neutral light. I will check this and when needed I will order a patch via my dealer.

Thanks,

Sjoerd.

cliffa · Mar 21, 2021

Folks, my neutral light constantly flashes when I have the lights on (2011 Sport) can anybody share the details of the fix please?

Cheers,

cliffa.

TonyA · Mar 21, 2021

The concept of the Neutral light flashing fix is to "pull up" to 12V the neutral wire leading to the speedo . This wire comes from the neutral switch on the transmission case and goes to 12V through a pull up resistor (the fix) . The pull up resistor value chosen by Norton was 1 K ohm , this is much too small if you are going directly to a un-switched battery 12v bike source. In other words , if an un-switched source of 12V (ie: directly to the battery) is used then there is a parasitic drain on your battery when the bike is turned off . The light flashes because the noise spikes/pulses are being seen as momentary lows and neutral light comes on ie: it flashes. Values high as 50K ohm , have been used successfully according to David C.

cliffa said:
Folks, my neutral light constantly flashes when I have the lights on (2011 Sport) can anybody share the details of the fix please?

Cheers,

cliffa.

This work is done inside the Speedometer shell : First the Norton Fix TSB :

Next the David Coote Fix :

This should be everything you need to do the job .

cliffa · Mar 21, 2021

Fantastic, thank you Tony !!

BikerBore · Jan 13, 2022

If I wanted to make my own patch cable (asking the factory isn't an option) for my flashing neutral light, what type of resistor would I need?

I don't see any 50k ohm resisters, but there are 47k ohm. They come with difference watts - 1/4w, 1/2w, 1w, 2w. Which would I need?

Is it a metal film resistor I'd need?

I've found 1w 47k metal film resistors, but seen 1/4w being recommended for sorting out the flashing of led indicators so is 1w too high for 12 volts?

Any electrical experts out there?

cliffa · Jan 13, 2022

I'm pretty sure I used 47K 1/4w resistors ( I did the fuel light as well as it was open) However I thought the later bikes already had the resistor in the loom?

BikerBore · Jan 13, 2022

cliffa said:
I'm pretty sure I used 47K 1/4w resistors ( I did the fuel light as well as it was open) However I thought the later bikes already had the resistor in the loom?

Thanks for that, I'll try one of those.

Mines a 2017 and still has the issue.

TonyA · Jan 13, 2022

BikerBore said:
I've found 1w 47k metal film resistors, but seen 1/4w being recommended for sorting out the flashing of led indicators so is 1w too high for 12 volts?

Its TOO big . 1/4W is the right size for in that physical spot and has minimal current draw. The higher the watts the bigger the body of the resistor . 47k ohms is fine !

BikerBore · Jan 13, 2022

TonyA said:
Its TOO big . 1/4W is the right size for in that physical spot and has minimal current draw. The higher the watts the bigger the body of the resistor . 47k ohms is fine !

Glad I checked!

BikerBore · Aug 24, 2022

Looking to do the flashing neutral light patch. I've removed one of the speedo connectors, but cannot see a release on the other. Is there a release on the other connector? Don't want to force it!

Kevan · Aug 24, 2022

Rob Jameson - Norton UK said:
If you would like to send me an email or PM with your address, I will send you the patch lead and instructions directly, although we will have coverage in NZ in the near future.

Did you ever get the patch lead? And do have the diagram?

BikerBore · Aug 24, 2022

BikerBore said:
Looking to do the flashing neutral light patch. I've removed one of the speedo connectors, but cannot see a release on the other. Is there a release on the other connector? Don't want to force it!

Sorted it!

Gojuu · Aug 24, 2022

@BikerBore good to hear.

This may be obvious, but be careful when reinstalling as the post holes in the back of the guage are quite weak. It may be worth taking the acorn nut from the housing and installing the posts prior to refitting the cup - if that makes sense.

BikerBore · Aug 25, 2022

Gojuu said:
@BikerBore good to hear.

This may be obvious, but be careful when reinstalling as the post holes in the back of the guage are quite weak. It may be worth taking the acorn nut from the housing and installing the posts prior to refitting the cup - if that makes sense.

Too late now, but that would have been a smart idea and make it a lot easier as lining up with the posts was fiddly. Had seen broken posts so was being careful and made sure I didn't over tighten.

Flashing neutral light

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