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Jallen14

HELP - YBR 125 2015 - Fault Code 33 (Ignition Coil) & Brake Light Issue

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Hi all!

I recently bought a 2015 YBR to use daily.

It needed some work (a new engine which I already had due to a doaner bike & to fix the brake light from being constantly on)

I recently had the engine swapped over and the bike fired up no problem (the brake light is still an issue)

Today I took off the rear brake switch and fitted the one from my doaner bike.

This did not fix the brake light issue but seems to have caused the bike to cut out after about 30 seconds and the engine warning light to come on (3 long flashes and 3 short flashes which is Fault Code 33 - Problem with Ignition Coil)

As I only swapped the rear brake switch I can’t see how this would have caused the bike to cut out and show the engine light but seeing as though this is the only thing I have done and happened just before it cut out I can only presume I have done something.

I have swapped the Ignition Coil which has had no affect. Both Ignition Coils show a continuity so I don’t think the ignition coil is the issue but maybe a wire leading to or from it.

As for the brake light, it constantly stays on even with both switches disconnected. I have swapped both front and rear brake switches with no luck. I have also swapped the bulbs which also had no affect. Due to the brake light being constantly on and both switches not being the issue I presume I may have a wire crossed or some other wiring fault.

Having looked at a wire diagram it looks as though the ignition coil and brake light switches are connected via the same wire so could these two issues be caused by the same fault? 

Other things that I can think of that could be an issue are the stator or ECU.

I am far from an expert in this field and would class my self as a novice mechanic with very little knowledge and having potentially caused the issue I am reluctant to delve deeper incase I cause more damage.

Has anyone had a similar issue or could give any advice or at least point me in the right direction?

Thanks in advance 

&

Ride Safe 👍

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Hi, well I know nothing about your particular bike but from others I have worked on I suspect you have a dead short somewhere, try taking the connector off of the ignition switch and see if the brake light goes out, if it does then it's the ign switch, if not then it's the brake light wire shorting across the frame some where. You say that the ign coil and brake light use the same wire! ok then try following that wire back as far as you can and see what it attaches to and unplug that and see what happens, it's always a problem trying to find a fault when you can't see the bike so where are you in the world? someone on here might be nearby and able to lend a hand. One other thing, always go for the simple things never start from the ECU or some other complicated piece of kit. it's usually the daft things that catch you out.😃

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1 hour ago, slice said:

Hi, well I know nothing about your particular bike but from others I have worked on I suspect you have a dead short somewhere, try taking the connector off of the ignition switch and see if the brake light goes out, if it does then it's the ign switch, if not then it's the brake light wire shorting across the frame some where. You say that the ign coil and brake light use the same wire! ok then try following that wire back as far as you can and see what it attaches to and unplug that and see what happens, it's always a problem trying to find a fault when you can't see the bike so where are you in the world? someone on here might be nearby and able to lend a hand. One other thing, always go for the simple things never start from the ECU or some other complicated piece of kit. it's usually the daft things that catch you out.😃

Hi Slice,

Thanks for your speedy responce!

Right i'll check the points you mentioned and let you know how it goes!

&

I am from Bradford, West Yorkshire, UK

&

Thankyou that makes sence! I'd hate to start replacing parts only to find out it was a simple faulty wire or connection.

Also, you state it could be a dead short (i'm sure doing what you mentioned will help me narrow this down) and that its difficult to diagnose a problem without having the bike infront of you, but is there anywhere in particular you could think of that it would be most likely to have the dead short (ie behind the headlight or near the battery or wires that could be trapped against the frame and tank / seat etc).

Thank you again for you advice. It is very much appreciated!!! :D

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No problem mate, right my best bet would be  to look for some where that the wire passes through or is tight against the bike or frame, then feel and look all round the wire to see what if anything has rubbed or pinched the thing. Again your making it difficult for yourself, don't think about where you think it might be ignore any sort of guess work just keep it simple, the wire is the most likely cause of the fault and until you have ruled that out stay simple. if your sure that's not the fault then start with your next best guess otherwise your going to be dancing all over the place and never get a handle on it. Do you have a multi meter? if you do then check the continuity of the wire from front to back, that will tell you if the wire is still good if nothing else. A wiring diagram will help you immensely with this sort of fault, dig around the net for one and use that to follow the route it takes around the bike. 

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