NSR front light issue

[Farmingstock]

Right after a long fought fork issue that is now fixed, I am nearly ready for the MOT!!

The problem is my front light!! The side light works fine!! But dip beam and main beam are intermittent!!

They come on now and again but no matter which wires I move ect, nothing changes then they will just come on all of a sudden!!

The passing light works every time, the horn, indicators and every other electrical component works fine!!

I have taken the light, switch apart!! No visible issue!!

Help!!

[Nobby the Bastard]

You need to go through each connector block (including the one to the bulb itself) and ensure that the connection is good.
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trevor saxe-coburg-gotha:"Remember this simple rule - scooters are for men who like to feel the breeze on their huge, flapping cunt lips."
Triumph Sprint ST 1050

[jaffa90]

Right after a long fought fork issue that is now fixed, I am nearly ready for the MOT!!
Did you have this light problem before the fork issue???

[Farmingstock]

The fault was intermittent before, now the main bulb won't work at all (other than the passing light).

I have put the multimeter to the wires going to the headlight bulb and the voltage is nothing on one wire and -0.31 volts on the other.

Nothing is obvious to see!!

Any checks that you guys can suggest?!?

The headlight only worked before when the bike was running not sure if that is normal?!?

[-]

I had the same issue on one of my NSR's. If I remember, it was a mix of a bulb and one of the wiring harnesses.

I could see damage in the connector where it had overheated.
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[Farmingstock]

There is only 3v going to the power part of the switch, where I presume there should be 12v+ I have traced the wire back and it goes to a relay that someone has fitted for some reason (looks none standard) the wire is blue with a white line, maybe the relay is at fault???

The other blue and white wire that goes into the relay has 14.5v and when I take them both out and connect them together the lights work absolutely fine, I'm not sure what this really is for but I don't want to take it out just in case it's for something important..

[Nobby the Bastard]

You won't be able to tell if it's original or not without looking at the wiring diagram.

There are two good reasons why you would want to fit relay on the headlight. Firstly, if you want to put in a higher wattage bulb, as the wiring is typically marginal at best, and could get a bit charred if you start drawing more power through it and secondly, even if the bulb isn't changed, heavier guage wires would allow more power through and you end up with a brighter light without changing the bulb.

Having said all that, it doesn't seem to apply in this case because you would use two relays (one main, one dipped) and pick up your trigger(s) from the light side of the switch and have your good wires going from battery via relay to the bulb.
____________________
trevor saxe-coburg-gotha:"Remember this simple rule - scooters are for men who like to feel the breeze on their huge, flapping cunt lips."
Triumph Sprint ST 1050

[Farmingstock]

The relay and wiring is definitely none standard it's a bit of a bodge had loads of tape wrapped round it and wires cut, I've looked at wiring diagrams and it's not on there can't seam to find any with positive and negative or voltage readings to see what each wire should have?!?

[Nobby the Bastard]

Just bypass the relay.
____________________
trevor saxe-coburg-gotha:"Remember this simple rule - scooters are for men who like to feel the breeze on their huge, flapping cunt lips."
Triumph Sprint ST 1050

[Farmingstock]

Any idea what this thing is used for? It has been wired into the bike as wel?!?

[Nobby the Bastard]

thats a rectifier. It converts AC from the genny to half DC.
____________________
trevor saxe-coburg-gotha:"Remember this simple rule - scooters are for men who like to feel the breeze on their huge, flapping cunt lips."
Triumph Sprint ST 1050

[Farmingstock]

Looks like it's been fitted as an after thought, wiring a been chopped into to fit it and it goes to the relay!! Should it be standard?!?

[Nobby the Bastard]

Without sight of a wiring diagram, I wouldn't have a clue.
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trevor saxe-coburg-gotha:"Remember this simple rule - scooters are for men who like to feel the breeze on their huge, flapping cunt lips."
Triumph Sprint ST 1050

[alains]

wiring for headlights is
- high beam = blue
- crossing = white
- side lights = brown
- green = ground
bulbs must not exceed 35W
you may spare some power by changing the dash bulbs (except the winker) with led bulbs T5 & T10 . the backlight can be changed by 2 equivalent to 21/5 W led (see pict) . the total spare will be around 20w permanently and 40w when brakes on
if you want my docs NSRtips send me a PM and i will send it (about 5 Mo in MS word)
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the worst day fishing is better than the best day working

[skatefreak]

Can confirm, Alains NSRDocs is much win!
Do check out!

[alains]

i dont know why , the joined pict has deappeared
so look here , pages of tail bulbs
https://www.ebay.co.uk/sch/i.html?_from=R40&_sacat=0&_nkw=led+stop%2Ftail+bulbs&_sop=15
about the image with 3 wires , it's an alien wiring , probably alarm
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the worst day fishing is better than the best day working