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NC30 Stop/Tail light issues (SOLVED)
Posted: Mon Oct 29, 2018 10:27 am
by st22041967
Sooooooooo I have just replaced the alternator and fired the bike up.
I have now noticed that the stop/tail lamps are on - and are VERY bright (regardless of light switch position)
AND that the brake switch switches these off when pressed.
Suggestions on a post card please as I'm rubbish with all thing electrical.
Thanks in advance guys
Re: NC30 Stop/Tail light issues
Posted: Mon Oct 29, 2018 11:50 am
by magg
The action and affect is not obvious. Perhaps other parts of the electrical system were disconnected and reconnected, not just alternator changed and simply reconnected to the loom in the engine V?
Re: NC30 Stop/Tail light issues
Posted: Mon Oct 29, 2018 1:08 pm
by st22041967
I changed the alternator myself.
I'm pretty sure I haven't disconnected anything else as its simply disconnect "3 pin yellow" alternator wires, replace and then reconnect when done.
Re: NC30 Stop/Tail light issues
Posted: Mon Oct 29, 2018 8:25 pm
by magg
Disconnect whichever brake switch causes the lights to go off, the switch may be faulty.
Re: NC30 Stop/Tail light issues
Posted: Wed Oct 31, 2018 8:55 am
by st22041967
Ok, Done that no change.
As I suspected the brake switch hadn't failed during the alternator removal/replacement process (Why would it?)
Re: NC30 Stop/Tail light issues
Posted: Wed Oct 31, 2018 10:35 am
by magg
Pure coincidence since as you say you only replaced the alternator. Does the fault exist without the engine running, why did you replace the alternator?
Re: NC30 Stop/Tail light issues
Posted: Wed Oct 31, 2018 10:23 pm
by Suzuki416
Also have you actually checked the voltage outputs?
Re: NC30 Stop/Tail light issues
Posted: Mon Nov 12, 2018 10:17 am
by st22041967
And the answer for anybody that is interested
BOTH of the rear bulbs which are the dual filament "stop/tail" type bulbs "Tail" filaments had blown simultaneously leaving only the remaining filament working on both. They were in fact taking all of the remaining current which made them VERY bright indeed so I hadn't spotted this.
Once I had actually taken the bulbs out and looked at them carefully it was obvious what had happened. Remove/Replace/Done.
Moral of this story....
Always start with the easiest/simple checks first before imagining more complicated problems!
But thanks magg & Suzuki416 for your help, much appreciated.
Re: NC30 Stop/Tail light issues (SOLVED)
Posted: Mon Nov 12, 2018 8:31 pm
by magg
Interested, but must say your explanation does not follow the principals of electromagnetism as I understand them. The stop and tail light circuits are independent with the exception of a common ground return. Two blown tail light filaments should result in no tail lights, not two stop light filaments constantly illuminated that go out when you apply the brakes. Such a scenario would suggest a wiring issue resulting in a poor earth or return connection.
Re: NC30 Stop/Tail light issues
Posted: Tue Nov 13, 2018 7:29 am
by Simplysideways
st22041967 wrote: Mon Nov 12, 2018 10:17 am
And the answer for anybody that is interested
BOTH of the rear bulbs which are the dual filament "stop/tail" type bulbs "Tail" filaments had blown simultaneously leaving only the remaining filament working on both. They were in fact taking all of the remaining current which made them VERY bright indeed so I hadn't spotted this.
Once I had actually taken the bulbs out and looked at them carefully it was obvious what had happened. Remove/Replace/Done.
Moral of this story....
Always start with the easiest/simple checks first before imagining more complicated problems!
But thanks magg & Suzuki416 for your help, much appreciated.
Thanks for letting us know your solution , I have the same issue at the minute but haven’t looked into it yet as the bike isn’t on the road yet