gt550m no light-cannot start

[carlo]

Hi
It's begon with losses of rpm when i drove, and later totally stop on engine. Could start up again several times, but engine stopped again. I find out, that the problem was there when I turned on the light. I thougt the problem was the ignition switch, and therefor I bought and replaced with a new one. But I was wrong.
If I don't turn on the light, I can startup engine; signal and stoplight are ok, but when i then turn on the light there is no light atall, and engine stops running . Few times i'v heard a "PUff" when i turned the swith to "light on".
Can someone please tell me where the faul is. Thankyou

[jabcb]

More than one possible problem, so some questions & sorting will be needed.

Could be a short in the lighting circuit.

Also could be that you aren't getting enough alternator output.
So the battery doesn't have a good charge.
And turning the lights on drops the voltage to the point the engine won't run.

Have you blown the fuse recently?

What shape is the battery in?
Does it have a good enough charge to use the electric start or do you kick start?

Do you have a multimeter?

Charge the battery up. Does that make a difference?

[carlo]

Thanks for answer
The battery (servicefree) was charged 2 month ago, and I think it was in a short time. (And machine is with electronic ignition, if it can make a different, to this faul)
I can never start engine electric when its cold; it has to be a bit warm before I can get electric starter to run. It's also more difficult to start engine cold, with kickstarter, than last year. (Electric reason, I don't know)
I will recharge and control battery tomorrow and see what will happen. And then come back evening.

[carlo]

I have recharged battery and tryed again, but same result.
Maybe its fail in some contacts; I have ignitioncontacts, (right side of handlebars) in off, and when I press electric startercontact, the flashlight starts up.

[jabcb]

I have recharged battery and tryed again, but same result.

What shape was the battery in? Did it take a long time to charge up?

Maybe its fail in some contacts; I have ignitioncontacts, (right side of handlebars) in off, and when I press electric startercontact, the flashlight starts up.

Not sure why you mean. Try to explain it again.

Take the headlight out.
Take a look at the wiring & wiring connectors in the headlight shell. Are there any bad connections, frayed wires, loose connections or worn wires?

Start the bike with the lights off & no headlight. Does the motor stop when you turn the lights on?


Do you have a multimeter?

[carlo]

(Start the bike with the lights off & no headlight. Does the motor stop when you turn the lights on?)
Thats exactly what happens.
The switch has tree positions: off, 1, 2 ( I bought and installed this new one) The old switch had 6 wires, only three was connected. The new has only four; i connected the three of this; not the brown coloured. This was not connected from the old one.
Someone told me, that position 2 (the new one) is only for parkinglight and with key out; engine shal not run here. (Engine stops, but there is no p.light)
So, if I'm right, light should be in position 1, and there should be light when using contacts left side of barrel. That's the problem.
I had looked for bad connections in contacts right and left of barrels, and used contactcleaner here and in headlighthouse where I could disconnect contacts and clean it.
I got problems with turn signal lights too, but I think it's a bad connector, and will change it tomorrow.
The battery should be in a good shape; not long time to charge.
I have not used a multimeter, but will try to get one tomorrow. How much charge with?
I hope you understand me.

[carlo]

But if light SHOULD be in position 1 engine is still running. Position 2 stops engine, and no light here.

[jabcb]

This is the wiring diagram for a GT550 with an ignition switch with 6 wires:
download/file.php?id=824

Ignition switch has three positions: Off, On & Park.
On powers everything on the bike with lights being controlled by left handlebar on/off switch.
Park lights only the taillight.

Wiring has two separate hot wires from the battery positive terminal to the ignition switch. These wires are red. (See R in diagram)

Wiring has two separate hot wires from the ignition switch. These are orange. (See O in diagram)
One orange wire goes to left handlebar switch that turns the lights on & off.
Other orange wire powers the rest of the bike.

I know this can be confusing. And really confusing with a language barrier.
Don't worry if you can't read or understand the wiring diagram.

I think the problem with your bike was that the old ignition switch was not connected correctly.

Look for wire connectors in the headlight bucket that aren't connected to anything.
What color are the wires & what type of connector is it?

Pictures of what you have would help.

You don't need an expensive multimeter. My multimeter cost something like $30 to $40 US.
Also, if I am right we may be able to figure this out without a multimeter.

[carlo]

ppp.jpg

Thank you very much for diagram.
I'v studiet, and worked with it again.
I drove some few miles yesterday, no fault at that, except the lights, which are the problem.
The turnsignal is now a problem too. Some times it can flash a single time, when I turn the key, or pulling at the wires around the turnlight rely, but there is long time between. Sometimes horn does not works, sometimes it does. The same thing about using electric starter contact, but this is mostly effecience when engine has running a bit first. It can happen the on/off contact works opposite.
I tryed to find power in the wires of the lightcontacts, left barrel, but could,nt. I was looking for pure connections too. But maybe there is a hided one.
The old ig.contact had 6 wires and 4 positions.
The new one has 4 wires,(3 is connected) not the brown one, and there is no power in the white one. I connected the same colours as the old one, but maybe that was wrong.
The bike has electronic ignition, if that would make a different to something.

[jabcb]

The pic helped.

The wiring layout in your headlight bucket is not stock. Someone made some changes.
The connectors with screws are not stock.
Also have several wires that don't connect to anything.

Don't know why someone made changes.
There may have been some problem with stock connectors or wires.
This may have been solved by using connectors that were easy to get.

Were you able to understand the wiring diagram?

If you can do it, it would be very useful if you can make a modified wiring diagram that shows what you have.
You can pull the wires out of the headlight bucket to make it easier to follow where each wire goes.
Just be careful when you move the wires so that you don't pull any wire out of a connector.

I should be able to help you figure out how to fix the wiring if you can make a modified wiring diagram.
As it stands, I don't know what changes were made and can't provide advice on how to fix it.

Sorry, wish I could provide more help.

[carlo]

As you wrote, I can see the best thing is to make a modified diagram. I wondered too, why someone made this.
I think I understand the diagram; I will see about try the work myself or find someone can do it for me.
I'm very happy for the help you gave me, thanks a lot.