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Discussion Starter #1
Is there any way to get twin headlights to flash alternately, left and right, like the cops lights?
Alternately, will one headlight modulator handle twin lights? Mabey at a reduced output?
Just checking, I have had the modulator from JC Whitney for a couple of months now but have misplaced the directions.
 

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FORUM GODFATHER.....R.I.P. PAT
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That would be illegal in most, or maybe all states.
 

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Gotta agree with greywolf. Alternating headlights BAD. If you only have one of the two headlights modulating just pray no cager assumes it is your signal light flashing. You can get modulator units designed for both headlights.
 

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And remember, "flashing" lights other than your signals are illegal! If you ever encounter an uninformed LEO who pulls you over for them, they are going to accuse you of having "flashing" lights. That is your opportunity to educate them that your lights are modulating, not flashing.

Always be sure and carry copies of the FMVSS that shows they are legal in all 50 states. It has kept me out of trouble on the several occasions I've been hassled.

I had a Kisan modulator on my dual-headlight GL1800 and it worked just fine.
 

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Not trying to threadjack, but I would like some information on these modulators. How many times a second do they seem to go from full to low power? Also, what is the FMVSS? I'm assuming that they modulate only the high or the low beam light? Do they have a light sensor to turn of the modulation at night?
I was thinking how easy it would be to build one of these, but I want to know a little more about them first.
 

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How many times a second do they seem to go from full to low power? Also, what is the FMVSS? I'm assuming that they modulate only the high or the low beam light? Do they have a light sensor to turn of the modulation at night?
They Modulate the light at a rate of 240 plus/minus 40 cycles per minute.

The FMVSS 108 is the Federal Motor Vehicle Safety Standards which makes it legal for motorcycle only to have headlight modulators in any state despite state laws to the otherwise. It also requires they have a light sensor so the turn off in low light conditions.

Most come set up for highbeam but can be modified easily to mod lowbeam.

Here's the one I use and they have a FAQ section: www.comagination.com. It cost about $89 for a twim light like on the V-Strom.

Hope this helps.

Rick
 

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Great info... thank you!
 

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Discussion Starter #8
Thanks for all the input

I have looked at all the alternatives and decided to let my cheap modulator sit in the cabinet a little longer. I am expected to know if I have a h4, h5 or h7 bulb in the thingamabob then decide if I want the heavy duty one or the solid state one.
I think I will have another beer and work on my radar dector a while longer.
I have already drilled a hole in the windshield to mount an extra LED and the stupid thing won't light up. Now I'm pissed, I'm gonna have to think about it for a whole 6 pack mabey. Might take till tomorrow, at least the chain oiler works.
 
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