How can I test if my CDI lighting coil is bad?

Elliot Ortiz /
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Hey all, long time no see...

Anyway long story short this is not a moped problem but a Lambretta issue, I'm posting it here just the old knobs on the Lambretta forum just told me to get new tires and look up a page on Facebook for electrical help...

Basically my issue is I have a CDI stator (BGM brand) that's running great where it counts, getting good spark, kill works, everything is grounded correctly, etc. there are 4 leads coming of this AC stator like most basic CDI's 3 go to the CDI box (ground, pickup signal, LT coil) and the last one is lighting, it's yellow.

Basically my lights don't work, the voltage I'm getting off the yellow lead from the stator is only about 2v. this is the same if I go right from the yellow lead or after the regulator, or elsewhere in the wiring loom (ie at the light). I know it's producing some power since the horn works. Can anyone tell me a surefire way to test the output of the stator lighting coil with a multimeter, see the image, this is my multimeter setting and I get that reading no matter where I measure from the stator yellow lead all the way to the headlight. Am I measuring wrong?

Sorry for off moped-topic but I feel like it's all the same stuff. In the past, I've always just hooked the yellow CDI leads on mopeds and pit bikes up to lights and a regulator and boom bright lights, any ideas? THX!

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