2009 Super 8 150 Headlight Issue--Unresolved

[Monty33]

Hello all...I'm new to the forum and hope some more experienced members can help me out.  I've seen a couple of threads on this topic, but with no real resolution posted so I thought I'd start my own.
I have a 2009 Super 8 150.  Recently, when I start it up, the headlights work.  But as soon as I give it some gas and begin to ride, then the lights go out.  They come back on when I'm stopped and idling.
I've seen a couple of posts saying that it might be the headlight coil, or the CDI, and some other suggestions.
From what I understand, this is a common issue with this scooter model.  Does anybody know what the real cause of this problem is?
Please bear in mind that I'm not very technichal when it comes to engines or electrical problems...but I'm sure I could replace a part or two with guidance.

Thanks in advance for any help....

[MotoRandy123]

Some of these bikes have a headlight control box that dim's them at idle.
That box might cause headlight problems.

I don't have your scoots wiring diagram to confirm this, if you can find one
I'll help you read it...

One person said he replaced the box and it didn't help but someone else said his
2013 needed the box from a 2012.

That is a definite saftey problem. If the box is bad and you don't want to replace it
you might be able to use a couple of relays to duplicate it's function...

I just read on another thread that the handlebar switch might be the problem. You might need to
open it up and clean the contacts...

[ophelia]

Is the battery cable connection tight and corrosion free? It might seem too easy of a culprit, but I fixed starting and electrical woes on a buddy's car recently. His negative cable was a little loose, so some of his electrics stopped working once he started to drive around.

[Monty33]

I have checked the battery cable connections and there is no issue there.  They are tight and the battery is new and clean.
I had also heard it might be the light control box, but didn't want to replace it unless I was sure that would fix the problem.  Wouldn't want to spend the money and then find out that I really needed a new CDI.

Thanks for your responses...

Anybody else have experience with this issue?

Also...where is the best place to order Kymco parts online?

[Monty33]

Found the wiring diagram...not much use to me...
Had to copy and paste into excel because file was too big to upload.

[MotoRandy123]

That wiring diagram is tough to read!

I found this page with some info on this problem;
http://www.kymcoforum.com/index.php?topic=1595.msg16905#msg16905

It looks like the CDI can cause a problem or a burnt fuse. Also the switch on the handlebar can
get crusty...

[Monty33]

Thanks alot MotoRandy.  I hadn't seen that particular thread on this problem before, but it helps with my decision to just try a new CDI. (and check the fuses again).

Any suggestions on the best place to buy one online?

[Monty33]

Just thought I'd give an update to this headlight issue.
I finally had to break down and bring my scooter to a shop about 30 miles away.  They diagnosed the issue of the headlights turning off above idle and fixed it by replacing the Light Control Module.

From reading other posts on this issue, there was a 50/50 chance that it was either the LCM or the CDI causing the issue.  After ordering a new CDI online for $75, I got no resolution.  Guess I should have ordered the LCM!

Oh well...it's fixed now so I can get my first inspection sticker in two years.

[TLRam1]

Thanks for updating this thread, always good when we get the resolution.