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Plug & Play™ Headlight Module

5 Stars

Product Description



Our headlight module is designed to increase the daytime visibility of your motorcycle by modulating your bike's existing headlight(s), in order to gain the attention of traffic that may pulling out in front of you, or turning left in front of you. 


Default Function: The Modulator will default to the "modulation on" state any time your motorcycle is started during daylight conditions. It will then modulate either the low or high beam (whichever you have selected) unless you manually switch off the modulation or low lighting conditions disable the modulation via the module's photo eye. If you have a bike that turns the high beam on in addition to the low bean when in the high beam position (instead of toggling between the two) only the high beam will modulate (low beam will be steady on).

Toggle Modulation ON or OFF at any time: With the Signal Dynamics Headlight Modulator you can easily toggle the modulation off and on by switching your bike's existing high/low switch to the opposite position and then back within 1 second. This is the only module on the market with this feature!

Auto Night Shut-Off The Plug & Play™ Headlight Module is designed to automatically turn on and off at specific light levels in order to comply with the DOT's regulation of no night time modulation.

Horn Alert Feature The headlight module has an input wire that attaches to your bikes horn wire (optional). When installed this feature will add a visual alert to your horn's audible alert during daytime conditions if you have the modulation toggled off. Pressing the horn will cause your headlight to modulate for 3 seconds and then return to steady on. This is the only module on the market with this feature!

Fitment & Required Harness Options

In order to use the Plug and Play™ Headlight Module you MUST also purchase the appropriate adapter harness for your motorcycle (sold separately unless you purchase the module / harness Combo). If you are unsure of which adapter harness your motorcycle needs, please refer to your owner's manual or local dealership to verify the type of headlight connector your motorcycle's headlight(s) have; alternatively you can view our compatibility chart to see what known motorcycles will fit our adapter harnesses, or email us a picture of your connector for identification.


First locate your headlight connector(s), (this may require some disassembly of your fairings). Next you will need to simply disconnect your existing headlight plug(s) and install our harness between between your bikes harness and your headlight. Then connect the 6 pin male connector from the adapter harness to the 6 pin female connector on the Plug & Play™ Headlight Module (this connector is polarized so it can only connect one way). Once everything is connected you will need to mount the optic sensor (grey or black wire with a photo eye on the end). We recommend mounting the optic sensor in a water protected area facing the road. Under the fairing pointed at the front fender is usually a good location. It is very important that the optic sensor is not facing toward the sky or directly at oncoming traffic, as headlights and street lights at night may cause the headlight module to activate. For those who would like a more permanent installation of the "Day Light Sensor", a 5/16 hole can be drilled into fairing. Otherwise, it can be secured to one of the bikes wires or cables with the zip tie. If you would like to utilize the horn feature use the included blue tap splice connector to connect the green wire from the harness adapter to the bike’s horn wire. The bike’s horn wire is the wire that connects the bike’s horn button to the bike’s horn. Note: there only two wires on the horn itself and one of them is where the green wire connects. Choosing the wrong wire will not harm the module or the bike in anyway; The horn feature will just not work. To finish mount the Headlight Module with the enclosed adhesive pad and secure all wiring in a manner that will not interfere with any of the bike’s controls. To test the module use an incandescent light source or move outdoors during the day - fluorescent shop lights and LED lighting will not activate the module.

Part Number: 01015
Weight: Less than 1lb
System Requirement: 12VDC(-)
Attachment Method: Included Double Sided Adhesive Pad
Height (in): 5/8"
Length (in): 2 1/4"
Width (in): 1 5/8"
Wire Length: 5"-6"
Plug Connector: 6 pin (plastic) Black - polarized

Material: Anodized Aluminum Case with Heat and Water Resistant Potting
Wire: 16AWG - 20AWG
Package Contents: (1) Plug & Play™ Headlight Module, (1) Adhesive Mounting Pad, (1) Tap Connector
Color / Finish: Black Anodized
Hardware Included: No
Connectors Included: Yes (1)
Tools Required: Zip tie(s) for optic sensor placement if you do not wish to mount in fairing
Waterproof: Yes (optic sensor is water resistant)
Water Resistant: Yes
Heat and Vibration Resistant: Yes
Companion Product(s): Choose 1 of 5 harness option (REQUIRED)



Product Videos

Signal Dynamics Diamond Star Plug and Play Headlight Module at Motorcycle-Superstore.com (01:07)
Hook one up: http://www.motorcycle-superstore.com/14/71/984/49862/ITEM/Signal-Dynamics-Diamond-Star-Plug-and-Play-Headlight-Module.aspx?SiteID=SMPR_YT_VD_SigDynHdlMod&WT.mc_ID=14004 Signal Dynamics Diamond Star Plug and Play Headlight Module: Toggle Modulation ON and OFF - The modulation of the headlight can be toggled on and off by the user at any time. When the bike is started the default is modulation ON. To turn the modulation on or off simply switch your bikes high low beam switch to the opposite position, and then back to the original position within one second (this can be done with the switch in either the high or low beam position). Auto Night Shut-Off - The Diamond Star™ Plug & Play Headlight Modulator is designed to automatically turn on and off at specific light levels in order to comply with the DOT's regulation of no night time modulation. To Switch From Max to Min Mode - The Diamond Star™ Headlight Module is equipped with two levels of modulation to meet your visibility requirements. (Both are fully DOT compliant). The default level is "Max" when the bike is turned on, but can easily be toggled to "Min" or back to "Max" by simply pressing the horn button twice within one second. Heads Up Alert - The Diamond Star Headlight Module can be connected to your bikes horn wire in order to add a visual alert to your horn's audible alert. Pressing the horn will cause your headlight to modulate for 3 seconds, then return to steady on; or toggle between min and max mode for 3 seconds if it is already modulating. Emergency Headlight Feature- The Diamond Star Headlight Module is constantly monitoring the bulb that you have selected (high beam or low beam). In the event the bulb(s) should fail; the alternate bulb(s) will instantly be turned on. This switching will only be done once; when the bike is turned off and then back on you will not have use of the bulb that failed until it is repaired or replaced. While the Heads-Up Alert feature will continue to function in the event of a headlight failure, the headlight will not modulate otherwise. If you find you cannot get your headlight to modulate, check the bulb. No Excessive Heat Build-Up - Handles high power demand sealed beam and halogen headlights totaling up to 130 watts! Operates efficiently with only slight increase above ambient temperature at continuous max headlight power rating. Surge Protected - Internal protection against transient voltage spikes during engine starts or charging system operation. Also drops out if voltage is too low, avoiding problems associated with low voltage. -Compact Size - 2 1/4" long X 1 5/8" wide X 5/8" high -Solid State Reliability 12V DC -Weather Resistant Heat Sink Case -1-Year manufacturer's warranty View a huge selection of motorcycle modification parts and accessories, as well as gear, tires and much more: http://www.motorcycle-superstore.com/?SiteID=SMPR_YT_VD_SigDynHdlMod&WT.mc_ID=14004
  • Signal Dynamics Diamond Star Plug and Play Headlight Module at Motorcycle-Superstore.com
    Hook one up: http://www.motorcycle-superstore.com/14/71/984/4...
  • Signal Dynamics Headlight Module
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  • Signal Dynamics Headlight Modulator Back Off Brake Light Kuryakyn LED Battery Gauge Video
    ynkmup a member of www.CruiserCustomizing.com shows us his SD-...
  • Plug & Play Headlight Module Installation
    Generally in less than a half an hour with a few simple steps ...
  • Signal Dynamics Motorcycle Headlight Modulator Review
    Full review at http://www.ridergroups.com/6727 Signal Dynamics...
  • Plug & Play Headlight Module Installation on a GL1800
    Learn how to install a Signal Dynamics Plug & Play Headlight m...

Warranty Information

Signal Dynamics Corporation warranties this product at time of purchase to be free from defects in material and workmanship to the original purchaser. Signal Dynamics Corporation's obligation under the warranty is limited to repairing or exchanging the unit if the unit is returned with the postage prepaid to Signal Dynamics Corp. within 1 year from the date of purchase. The warranty is void if the unit has been incorrectly installed, damaged, or tampered with. This warranty specifically limits Signal Dynamics Corporation's liability to unit replacement only and specifically excludes any consequential damage arising from use proper or improper or failure to properly function. A copy of your purchase receipt or other proof of purchase is required when applying for warranty consideration. See full Warranty and Return Policy!

Product Reviews

Write your own product review

  1. Nice product, easy install 4 Star Review

    Posted by on 12th Jul 2019

    This is my second headlight modulator, but my first my signal dynamics. The hardware seems to be very well built. Albeit a little large, depending upon the amount of space you have available in your headlight. I was able to stuff everything inside my headlight after the installation was complete. My only complaint is that the optional horn wire was too short for my bike to be used, and I think the sensor is overly large for no reason. The sensor on my previous modulator was very slim and inconspicuous. SD gives you the option to permanently mount the sensor so I understand the size. All in all I am satisfied with my purchased and have considered getting the rear light modulator as well.

  2. Excellent Investment!!! 5 Star Review

    Posted by on 22nd Dec 2016

    Short story. I have ridden motorcycles since my first 305 Honda Scrambler in the mid 1960's. Since I have owned 10 more from Honda to Harley. My current 1984 Yamaha Venture has 179,000 miles on it and still going strong.
    My biggest concern is not being seen on the roadway. Having to have laid my bike down thee times in its life, I was always given the excuse "Sorry I didn't see you". This headlight pulser increases my visability by at least 500 percent. It is truely a device that should be installed on every motorcycle that takes to the road.
    If you are concerned for your safety, I highly recommend purchasing this device. It's alot cheeper than an erergency room visit.

  3. recommended 5 Star Review

    Posted by on 6th Sep 2016

    I have an older version "Diamond Star" modulator which was satisfactory but did have some issues. It's refreshing to deal with a company that actually improves n an already good product. Absolutely NO issues this time, works perfectly & increases my confidence that people may actually see me coming. Good job!

  4. I am a believer in this product. 5 Star Review

    Posted by on 7th Apr 2014

    This is my 2nd install of the headlight modulator. First one was a couple of years ago on my 2004 GL1800. I can't tell you how many times I have see car drivers hesitate and not pull out in front of me because they noticed the flashing lights. Just got a new to me 2007 Goldwing and this was the first accessory I installed. Did have a problem with the harness adaptor, (see that review), but a great product overall. Just be warned, if your bike has the comfort package, getting to the left hi beam is a job.

  5. Perfect. 5 Star Review

    Posted by on 20th Dec 2013

    Easy install. Question to Customer Service answered in 10 seconds. I will buy again....thanks!