Cbf 125 headlight not working

[mariust5]

Hello everyone , been reading the forum a while but never posted before .
I got a 2011 CBF125 for my son as his 1st bike off Marketplace , seller did say that the lights might need sorting and i'm up for a challenge usually but this one has me beat .

The bike has aftermarket switches, lights and dials and the wiring is a little on the bad side but it all works part from the main beam headlight and the dials won't light up .

Indicators work , brake lights also , there is a little bulb in the headlight assembly also and that comes on when the engine is running but sometimes flickering so that leads me to believe it might be the stator ?

Would the engine still run fine if the stator was bad ? I tried to take the cover off for a visual inspection but on removal of top bolt from chain cover something was coming out like some sort of oil and did it back up .

I had friend that knows how to handle a Multimeter and he said there was no power coming in to the bulb , we checked the bulb directly to the battery and it works . We had the dials light up at some point but i disconnected the wire from where it was and can't replicate it

If anyone has any ideas please let me know .

Thanks .

[Nobby the Bastard]

I would suggest that there are two issues.

The dash lights.

The headlight.

The dash lights, well, you need to and trace both the earth and power wiring from and to it. You clearly know it's fixable because you hadthem working.

The headlight. The common thing with the dipped and main beam for the headlight is the dipped and main switch. Does power get to it?

For both of these you need a wiring diabram to give you a clue as to what colour wire you should be looking for.
____________________
trevor saxe-coburg-gotha:"Remember this simple rule - scooters are for men who like to feel the breeze on their huge, flapping cunt lips."
Sprint ST 1050

[mariust5]

https://imgur.com/a/Ng7M5zh

[Nobby the Bastard]

I say we take off and nuke it from orbit.
____________________
trevor saxe-coburg-gotha:"Remember this simple rule - scooters are for men who like to feel the breeze on their huge, flapping cunt lips."
Sprint ST 1050

[stinkwheel]

The headlight will only work when the engine is running. It is powered directly from the generator via a fairly complex yet at the same time basic split halfwave charging system. The battery has nothing to do with the headlamp function.

The standard headlamp is a bit pish and it's not uncommon for owners to fit a higher wattage bulb (it should have a 35/35w bulb). This is a bad idea because it overloads the system. They can burn out wiring componants and melt the headlamp lens.

Find the reg/rec. The lighting output is in the yellow wire. Check for voltage between here and earth (either bare metal on the bike or the green wire) with it connected and the engine running. You should get a DC output which climbs to 12-ish volts as revs increase. It will be dirty DC and it will be positive earth (and so will read a negative voltage if you connect the common lead of the meter to earth). Some meters may not read it on the DC setting and need to be set to AC.

If you have 12-ish volts here, the charging system and reg/rec are working. The problem lies upstream (so switch or wiring). If you have no output here, the problem is most likely with the reg/rec. Because it is a split coil, if it's charging the battery and running the engine, it should also be producing a lighting output.

Here's a wiring diagram.
____________________
“Rule one: Always stick around for one more drink. That's when things happen. That's when you find out everything you want to know.”
I did the 2010 Round Britain Rally on my 350 Bullet. 89 landmarks, 3 months, 9,500 miles.

[stinkwheel]

https://i.imgur.com/qbvEc55.jpeg
Holy fucking shitballs!!

Buy a new loom. Rip all that shit out and fit the new one. This is the easy way, you will never be done messing with it if you try to fix that rats-nest.

Best £20 you'll ever spend, believe me! You could probably resell all those wago blocks to cover the cost.
https://www.ebay.co.uk/itm/174828070669
____________________
“Rule one: Always stick around for one more drink. That's when things happen. That's when you find out everything you want to know.”
I did the 2010 Round Britain Rally on my 350 Bullet. 89 landmarks, 3 months, 9,500 miles.

[stinkwheel]

If you spend another £50 or so, you can get a set of used switches and clocks.
____________________
“Rule one: Always stick around for one more drink. That's when things happen. That's when you find out everything you want to know.”
I did the 2010 Round Britain Rally on my 350 Bullet. 89 landmarks, 3 months, 9,500 miles.

[mariust5]

Ha , ha , thanks for the reply

I looked to get some original parts but there are brackets and mounts that are missing and the total cost is beyond me at the moment .

About buying new switch i will be in the same boat as these look new just badly wired and prolonged with more wires as not long enough .

Only thing i'd do is the old twist the 2 wires together and tape over . Get rid of the blocks

https://imgur.com/nLXMewP

[mariust5]

This is the Headlight unit

https://www.ebay.co.uk/itm/125367262666?hash=item1d30789dca:g:5JMAAOSw0qNiT8n6&amdata=enc%3AAQAHAAAA8CilnVESvQdhIRNMcS1MX96xqFCbdJCZrZmsO2FKXvEYENEB3tAcJPDFXmqh779d5SU3QLJu6PRN8ZY8A3ma%2FvOlX6PwPdUfGg37YhFH1o5IrbHNStFwhfsWt8Rq3pt8iyaZmOT3u1yWIffD7nwsVKfy5hTeSCz3MJJd7m4lThTiXhTvsbyTOIrPX5fT1Nrd1ACTPqzM5z9UAXorjxdt1CL89vRQ13yC9PuDb3wmHW2NiQRo3BIwdAbGOsLQgPd5%2FnItaKK8Px76K0jHXGdoj72V%2BNDWWf7fwl8TaCiZasAIffba3xrD7Uo0bHGpx8fS4w%3D%3D%7Ctkp%3ABk9SR8yj4tKCYQ

[xX-Alex-Xx]

Holy fuck .... Yeah just rip it out and replace the lot. At least go with OEM style connectors and not Wago...
____________________
DILLIGAF

[stinkwheel]

[mariust5]

Thanks

I'm not much good with Multimeters , i've let my friend do all that .

New development , we've opened the switch to see if something's amiss there and didn't find anything , just my friend said that there is no power coming to it , i take it it needs 12v from the stator . i wish we didn't as next day i've come to it most wires disconnected so i've soldered them back in but now the left hand side indicator doesn't work anymore even if touching the wires together without the switch . The indicator itself is fine as touched some wires and they came on just not from where they should . Off !!

The dash light came on again but gone off and can't replicate it ..

If anyone can tell me how to set up the meter to read those resistances i'd appreciate it please .

This is my meter https://imgur.com/a/Ng7M5zh

[Rob Fzs]

You're going to be chasing bodged wiring forever

just buy a loom off ebay, i might even have one in my shed you can have for 15 quid

i've reframed a cbf and there's not much to them
____________________
'00 Aprilia RS50 > '92 Honda CG > '99 Yamaha Fazer > '91 Yamaha RXS > '79 Suzuki X5 > 01' Honda Cg > 07' Honda Cg > 82' Kawasaki Z200 > suzuki gsxr 400 gk73a > honda vfr 400 NC30> Yamaha RD350 YPVS F2 > Kawasaki ZZR 600 D1 > Yamaha TZR 250 2MA >Suzuki TL1000R > Yamaha TDR250 > Honda 929 blade > Suzuki SV1000 > Honda H100
Mod 2 Passed 09/06/2011

[mariust5]

Looking on youtube it doesn't seem that my meter has a Diode Mode

And this is my friends Meter , seems too simple , not for Automotive i think https://imgur.com/WQsJIII

[mariust5]

[Nobby the Bastard]

[Rob Fzs]

[mariust5]

[/quote]

buy some good waterproof connectors and reattach , or get new switches/ light looms

i'll see what i have tomorrow[/quote]

Thanks , my wiring loom seems fine , is the dials and switches that have no connectors that is the problem ..

I played with the indicator switch again and i think it had it , as touching the wires further up makes the left indicator work fine .

This might do the trick ?https://www.ebay.co.uk/itm/195400566595?_trkparms=amclksrc%3DITM%26aid%3D1110006%26algo%3DHOMESPLICE.SIM%26ao%3D1%26asc%3D242922%26meid%3D2f4426ab47a04e0895667aba2c5cff5f%26pid%3D101195%26rk%3D6%26rkt%3D12%26sd%3D313515304025%26itm%3D195400566595%26pmt%3D1%26noa%3D0%26pg%3D2047675%26algv%3DSimplAMLv11WebTrimmedV3MskuAspectsV202110NoVariantSeedKnnRecallV1DwebOnly%26brand%3DHonda&_trksid=p2047675.c101195.m1851&amdata=cksum%3A1954005665952f4426ab47a04e0895667aba2c5cff5f%7Cenc%3AAQAHAAABIPnNgQzrwy4hcSW%252F1r0wjcHUoW2vznLktC1ywnd%252BfgwtVkfbqrg79mnCGmVqoaequeJtVfKXg136SWaKVngTop3JnbmUEUdhfiQsEDWfHdb4Rt3aIUmochAXBc%252FntwU3bCt4IT%252Fph6E0%252B6jxIKhwPMypHGwFO60a%252Fh6tdPSEm56BKt7ceU%252B71vL69LjGkblougcLLhZHu12WCYTjRICQi7S8pZsSmcmbo2vida824K%252FRc%252F%252F2UVV%252BEDHuLqxBIkHYc6Md21GUqYooZ85HW%252BS9Jj%252BATwxf005pzmmn6BktJFsDZ33oiO9ecg61N1yaJ3M4Tq5pWGc1rW3NKjCUr%252FYxcpb%252FOegu0uIaXwhYVWEg3AdQyB89sMDlazaO%252B9qqlVTQLQ%253D%253D%7Campid%3APL_CLK%7Cclp%3A2047675

[Nobby the Bastard]

I really couldn't be arsed to go through a whole loom of wiring and ancilaries to make sure it was all connected together properly.

i'd replace with a good second hand loom with the correct connectors and if other bits have had the connectors removed get second hand ones of them as well.

Fucking mugs game fixing that rats nest.
____________________
trevor saxe-coburg-gotha:"Remember this simple rule - scooters are for men who like to feel the breeze on their huge, flapping cunt lips."
Sprint ST 1050

[stinkwheel]

https://i.imgur.com/1nFr868.jpeg

Leave the probes in the sockets they are connected in now.

To test normal output, like to see if you're getting power at the bulb or the battery voltage or a voltage output at the reg/rec, set it to 20 in the DCV section.

To test the resistance of the stator windings set it to 200 in the "Omega symbol" section.

To test for an open or short circuit, set it to 200K in the "Omega symbol" section (a reading of 1 usually indicates an open circuit. A very low reading, pretty much the same as if you touch the probes together, indicates a short circuit).

To test the AC output of the stator (between the green and white with the reg/rec disconnected and the engine running) set it to 200 in the ACV section.

EDIT: your mates one is a high quality voltmeter but is just a voltmeter. His will be more accurate, your does more.
____________________
“Rule one: Always stick around for one more drink. That's when things happen. That's when you find out everything you want to know.”
I did the 2010 Round Britain Rally on my 350 Bullet. 89 landmarks, 3 months, 9,500 miles.

[slowasyoulike]

As others have said, get a new loom. I would not even entertain trying to fix that.

Even in the unlikely event you get the headlight working, it'll only be a matter of time before something else fails

[mariust5]

[Nobby the Bastard]

[stinkwheel]

[mariust5]

There is no yellow wire coming from the stator .

The back light works fine .