MC_D150TKA Headlight Trouble By cdmor (Read 1,170 times)

[cdmor]

Over the past few months my headlight (even bright light indicator) has dimmed occasionally and then returned to normal. During the moments when it dims, RPMs have no effect. No other electrical gages or lights are affected. Now it seems to be permanent. Headlight is so dim, I can no longer ride at night. I keep bike connected to maintainer when not in use and have new battery less than a month old. Bike starts and runs fine, just extremely dim headlight. Hope someone can help or know of possible solution as local scoot shop has 2 week out waiting list.

[Alleyoop]

Get a volt meter and connect it to the battery and rev it up to 3-4k and see what it reads.
The Regulator/Rectifier may be bad.
Alleyoop

[cdmor]

Thanks for your reply. Not familiar with a voltage meter. DC at battery right? What should it read?

[Alleyoop]

Yes DC at battery, you can pick them up at a HARBOR FRIEGHT store for around 10 bucks or less. You do not need a real fancy one. Also pick up a 12v LIGHT TESTER they are great to find something that supposed to be getting juice and is not.
Alleyoop

www.harborfreight.com/7-function-multimeter-98025.html

www.amazon.com/Professional-6-12V-Circuit-Tester-Indicator/dp/B003UHNMMS

[cdmor]

Replaced regulator today and no change to head light. Hope someone can give any idea of to try next. Had stator replaced about 6 months ago.

[Alleyoop]

If your going to own any kind of a scooter or motorcycle you need a VOLT METER and a LIGHT TESTER. You need to find out if your battery has a bad cell and how your charging system is working. Otherwise your going to just be replacing parts and wasting money.
Alleyoop

[dragonsparks]

I totally agree with Alley you're going to need a decent multi-meter. Just make sure it test for continuity. A light tester is useful to. I have one made by snap-on & I haven't used it in 20 year's. That's only because I don't do low voltage motor controls & energy management control systems any longer. I personally prefer my amp probe multi-meter. That's just me.

If I remember right if you test your battery at rest with a full charge anything from 13.2 to 13.8 is great. 12.6 to 12.9 average. 12.0 to 12.4 is bad.

Dave