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Enduro Electrical & Wiring Lighting, Ignition, Wiring, Plugs, etc.


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Old 09-18-2019, 02:16 AM
dimtsam dimtsam is offline
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Hi
I made a DC convertion on my bike. I put the yellow wire (after the voltage regulator) that comes near the headlight, and the a groung cable to one voltage rectifier (like the photo). Then I connect the DC cables, after the rectifier, to the headlight socket. The measure with my multimeter is from 9 to 12 v. So everything looks normal.But when I connect it to the headlight bulb, after a little riding, the bulb goes off.
Any ideas? Is the problem on my voltage regulator? Why I dont get overvoltage measures to my multimeter?

Thanks a lot
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Old 09-18-2019, 02:56 AM
Pygmygod Pygmygod is offline
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Are you measuring the voltage at all different amounts of throttle?
Or just idling?
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Old 09-18-2019, 03:16 AM
dimtsam dimtsam is offline
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Yes. not only idle.
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Old 09-18-2019, 11:34 AM
Neil E. Neil E. is offline
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Let's review:
Stator output yellow and chassis ground to the rectifier input.
Rectifier output to the headlight socket.
One wire to the filament terminal, other wire to the bulb shell terminal.
So far so good.

The fly in the ointment might be the stock GG voltage regulator. Let's say the GG stator can put out 60 volts AC when the revs go up. The GG regulator is supposed to clip this at ~13VAC so your bulbs don't burn out.

There have been many postings about stock regulators not performing properly. I would guess your new rectifier is converting to DC OK, but an AC overvoltage would give you a DC overvoltage and burn out the bulbs.

The only solution is to use a regulator/rectifier unit instead of the basic rectifier shown in your picture. It would then protect against overvoltage. You could try adding a zener diode that would block voltage instead but they aren't cheap.
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Old 09-18-2019, 02:40 PM
dimtsam dimtsam is offline
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Thanks a lot Neil. Any suggestions for regulator/rectifier? I know about the Trailtech. This afternoon I made a test with a chinese reg/rec ( 4 wires) that the 2 wires are the DC and the other two are the yellow and the white cables that comes from stator (2 phase). It didnt worked well. So I dont know if there is an other option except the Trailtech's one.
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Old 09-19-2019, 06:26 AM
Pygmygod Pygmygod is offline
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Why change to DC light?

If it's designed and installed to run on AC then why bother going to the trouble to swap it over?

Does it put out higher or more consistent light output by going DC?
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Old 09-19-2019, 11:01 AM
dimtsam dimtsam is offline
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Because you can connect a radiator fan.
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Old 09-19-2019, 11:24 AM
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Just so you know, you can still run DC for a fan while leaving your lights AC.
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Old 09-19-2019, 05:39 PM
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You have installed a rectifier and depending on your volt meter you may only read 0.707 of the peak voltage. Your actual voltage may be 1.414 x 12= 16.9V.

You can install a regulator https://www.motosport.com/product/?c...445339&variant[TRH0001]=TRH0001-X001-Y001


or a LED bulb that has a wider range of input voltage.

https://www.ebay.com/itm/H6-BA20D-DC...0b90bd07b5a0ba
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Old 09-20-2019, 04:23 AM
dimtsam dimtsam is offline
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Quote:
Originally Posted by SS109 View Post
Just so you know, you can still run DC for a fan while leaving your lights AC.
The problem remains even if I use AC
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