Aux high beam modulator - BMW Luxury Touring Community
LinkBack Thread Tools Display Modes
post #1 of 4 Old Nov 2nd, 2009, 3:01 pm Thread Starter
Senior Member
pozo_izquierdo's Avatar
Join Date: Apr 2004
Location: Hyvinkää, , Finland
Posts: 1,583
Aux high beam modulator

Hi guys,

running gradually out of farkle ideas I thought that why not make a flasher / modulator for my Hella FF aux high beams. This would be just for the occasional lane splittings as I would need to draw the attention of the bull headed half blind drivers in front of me. I don't want to use the 4-way emergency flashers as I would be drawing the unnecessary attention from the behind also.

The head light modulators as such are not allowed over here and some units that I have seen on the web are designed to be connected right behind the headlight bulb.

I would need a separate unit to command two 55 W halogen bulbs. Is there any rocket science in those units? I was thinking of building one out of a regular turn signal flasher relay that would be commanding a heavy duty 70 amp relay feeding the lights as I am afraid the turn signal flasher would perhaps not tolerate the 110 W halogen load. I happen to have one extra switch (the last one of my 18 extra switches ) available for commanding the turn signal flasher relay. Whaddya say, would this work?


Ari "the Farkle-Freak-Finn" Ignatius

Hyvinkää, Finland
2004 ('05) LT, Dark Graphite, "Sunset Cruiser II"

Bike trip from Finland to USA:

To view links or images in signatures your post count must be 10 or greater. You currently have 0 posts.

Pictures of various farkle projects:

To view links or images in signatures your post count must be 10 or greater. You currently have 0 posts.
pozo_izquierdo is offline  
Sponsored Links
post #2 of 4 Old Nov 2nd, 2009, 5:18 pm
BMW Guru
Ted Shred's Avatar
Join Date: Feb 2003
Location: Nor Cal, , USA
Posts: 8,469
Re: Aux high beam modulator

I'll bet one of these would work. We sell lots of them at our shop. They have a contact link if you need technical help.

2016 R1200GS Adventure
2006 DRZ400E

2007 G650 X Challenge
2006 GT200
2005 R1200GS

To view links or images in signatures your post count must be 10 or greater. You currently have 0 posts.
Ted Shred is offline  
post #3 of 4 Old Nov 2nd, 2009, 5:20 pm
Senior Member
dshealey's Avatar
Join Date: Apr 2002
Location: Dandridge (Near Knoxville), TN, USA
Posts: 12,165
Re: Aux high beam modulator

There is no magic to them, and there are purchaseable units available which are wire in.

The law here in the USA is that the modulated light cannot be modulated from on to off, but only to a reduced light level, and at a specified frequency. The specifics are in an available federal document, which I have on my computer but it is too large to paste. If you are interested, I could find the section and post the relevant portion. However, since it is not legal in your country it is pretty much a moot point, and you could just use a timer and relay. If I was you, I would just purchase a "wire in" unit from one of the suppliers here and use it. It is easier on the bulbs to use one of the US legal modulators than to develop an on/off flasher. However, as you stated, just using a turn signal flasher to drive a relay capable of the higher current would be very easy to do.

PS: If you were to purchase a modulator for a Gold Wing, it is already capable of driving two headlight bulbs.

I don't want to achieve immortality through my work...I want to achieve it through not dying.

David Shealey
Dandridge, TN
EX: '01 Black LT, BAT BYKE (Totaled at 110,000 miles)
IBA SS, BB, BBG, 10/10ths.
No bike now, but maybe in the future.
dshealey is offline  
post #4 of 4 Old Nov 2nd, 2009, 9:20 pm
Lifetime Supporter
shoswell's Avatar
Join Date: Apr 2008
Location: Nashville, TN, United States
Posts: 1,425
Re: Aux high beam modulator

Would this or something simular not do what your are after?

'Stupidity has a knack of getting its way.' --Albert Camus
'05- K1200LT - Gretchen
R.I.P. - '00- K1200LTE- "Barbara" - Retired at 168K 9/2011
shoswell is offline  

Quick Reply

Register Now

In order to be able to post messages on the BMW Luxury Touring Community forums, you must first register.
Please enter your desired user name, your email address and other required details in the form below.

User Name:
Please enter a password for your user account. Note that passwords are case-sensitive.


Confirm Password:
Email Address
Please enter a valid email address for yourself.

Email Address:


Currently Active Users Viewing This Thread: 1 (0 members and 1 guests)
Thread Tools
Show Printable Version Show Printable Version
Email this Page Email this Page
Display Modes
Linear Mode Linear Mode

Similar Threads
Thread Thread Starter Forum Replies Last Post
H7 High Beam? cjklemp Lighting 3 Jul 7th, 2008 10:25 pm
High Beam / Low Beam Adjustment tomandmelanie K1200LT 3 Aug 4th, 2007 9:26 pm
CQ HID High Beam installs.... BillyOmaha Lighting 7 Mar 7th, 2007 1:14 am
HID High Beam on '99 LT dlbushey Lighting 4 Jan 24th, 2007 10:56 pm
HID High Beam on '99 LT dlbushey Lighting 2 Jan 23rd, 2007 2:58 pm

Posting Rules  
You may post new threads
You may post replies
You may not post attachments
You may not edit your posts

BB code is On
Smilies are On
[IMG] code is On
HTML code is Off
Trackbacks are On
Pingbacks are On
Refbacks are On

For the best viewing experience please update your browser to Google Chrome