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Not sure if any of you have had the same problem, but two or three weeks ago I noticed the low beam had stopped working on my Duke 390. After a lot of head scratching and the use of a multimeter I eventually traced the problem to the button on the front of the left hand switchgear, which you use to flash your high beam. It seems that a little bit of corrosion had got into this switch and prevented the circuit for the low beam.

A quick squirt of Electrical Contact Cleaner and ACF50 and I've not had a problem since.

Thought I would share this as it may help some of you with the same issue.
 

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Thanks man, I was wondering why I was getting just 5volts to the actual connector of the globe. I cleaned the switch block and got it fixed !
Cheers.
 
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