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Plug & Play™ Headlight Module + Single H4 Harness Adapter

5 Stars

Product Description




Examples of motorcycles with Dual H4 Headlights: Do you have a Single H4 Headlight?





This Combo Package includes:
(1) Plug & Play™ Headlight Module & (1) Single H4 Harness Adapter

Our headlight module increases your daytime visiblity by modulating your incandescent headlight (think flashing, but not quite..) from about 30% intensity to 100% intensity about 4 times per second. When approaching oncoming traffic, your modulating headlight will help you become 10x more visible compared to a standard motorcycle headlight, drastically reducing the risk of potentially fatal collisions involving automobiles. It sounds like it is about time to get yourself a Plug & Play™ Headlight module, right? This module isn't like the rest you've seen, take a look at the advanced features of our Signal Dynamics Plug & Play™ Headlight Module below!




Toggle Modulation ON and OFF The modulation of the headlight can be toggled on and off by the user during daytime hours, as per DOT regulations this feature does is not available at night. 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).

Full Function You do not have to compromise between the high beam and low beam with a Signal Dynamics Plug & Play™ Headlight Module because this module will modulate your high OR low beam headlight(s)... you get to choose whenever you want! This feature is useful along with the ON/OFF feature: i.e. You're riding in heavy traffic and you don't want to annoy the bumper to bumper traffic ahead of you, so you switch your modulating low beam(s) off and turn on your solid non-modulating high beam(s).  

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.

Switch From Max to Min Mode This 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 Feature The Headlight Module harness has a green wire that can be connected to your 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 (if the module is off) and then return to steady on; If your headlight is already modulating it will instead toggle between min and max mode for 3 seconds, thus giving you a faster flash rate for 3 seconds to give that approaching vehicle a 'head's up'.

Emergency Headlight Feature The 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. Additionally 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.

Fitment & Required Harness Options

This Combo Package includes:
(1) Plug & Play™ Headlight Module & (1) Single H4 Harness Adapter

In order to use our Plug and Play™ Headlight Module an appropriate adapter harness for your motorcycle required. 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 bulb(s) your motorcycle uses; alternatively you can view our compatibility chart to see what known motorcycles will fit our adapter harnesses. 


Note: If you have a 5 3/4" headlight bucket, you will need to use the Universal Harness Adapter due to limited space inside the headlight bucket.

We believe the information in our compatibility chart to be true and correct to the best of our knowledge at the time of publishing. If unsure of the specific type of headlight bulb you have, please consult your owners manual or local dealership to verify the type of adapter harness your motorcycle requires. Our company, Signal Dynamics Corporation, cannot be held accountable for any information that is found to be incorrect during installation and will not be liable for any losses incurred from incorrect information. 


To install your Plug & Play™ Headlight Module and Single H4 Harness adapter, under normal circumstances, all you need to do is essentially Plug & Play™! To begin, 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). Now take the your motorcycle headlight plug (left plug for dual headlights and secure the unused right plug aside) and connect to the black harness adapter plug, then connect the opposite end of the harness adapter to the back of your headlight plug(s). 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 "Heads-Up" Alert 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 Heads Up Alert feature just will not work. To finish up, 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 + 01083
Weight: Less than 1lb
System Requirement: 12VDC(-)
Attachment Method: Included Double Sided Adhesive Pad
Module Height (in): 5/8"
Module Length (in): 2 1/4"
Module Width (in): 1 5/8"
Module Wire Length: 5"-6"
Module Plug Connector: 6 pin (plastic) Black - polarized
Headlight Plug Type: H4
How many Headlights: 1 - H4 Headlight

Module Material: Anodized Aluminum Case with Heat and Water Resistant Potting
Wire: 16AWG - 20AWG
Package Contents: (1) Plug & Play Headlight Module, (1) Single H4 Harness Adapter, (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 drill and mount)
Waterproof: No
Water Resistant: Yes
Heat and Vibration Resistant: Yes

Warnings and Notes: 
1.) As per D.O.T. regulations, the Heads Up Alert feature DOES NOT work at night.
2.) The headlight module is designed for use on motorcycles with a 12 volt DC negative ground electrical system; and will not work on motorcycles with an AC electrical system. 
3.) It can be used with any sealed beam or halogen headlight up to 130 watts for the low beam, and 130 watts for the high beam (260 watts total). 
4.) Module is NOT compatible with HID or LED Lighting. If you have any questions regarding electrical system compatibility with your motorcycle, contact your motorcycle's manufacturer or authorized dealership. 
5.) The Headlight Module has been designed to provide static free operation with your radio and intercom systems; however, some hard-wired systems will still produce unwanted static. 
6.) The Plug & Play™ Headlight Module is legal to use on motorcycles in all 50 states, and Canada.
7.) Test function once installed with incandescent lighting or pull bike outdoors, fluorescent and LED lighting will not activate module. 

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

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Showing reviews 1-10 of 17 | Next

  1. Everyone sees me now! 5 Star Review

    Posted by on 1st Aug 2019

    It took me a few minutes to install this product, works like a charm. I notice everyone looking at me now, this gives me a much higher level of confidence particularly in heavy traffic.

  2. strobe 5 Star Review

    Posted by on 5th Jun 2019

    it wa just what it says it was it simple plug and play all I did was remove my headlight and plug it in and it work real nice that was all there was to it

  3. definitely alerts oncoming traffic! 5 Star Review

    Posted by on 7th Dec 2017

    Loud pipes,backoff module ,flashing headlight really makes a difference.

  4. Best Customer Serivce EVER 5 Star Review

    Posted by on 27th Nov 2017

    For a company that deals with online ordering of their products, I must say they have an outstanding customer support person Named Porsha!!!!! I had ordered the head light module and when I didn't receive it but I received an invite to write a review of the products I had ordered. I sent an email to the customer support address, within a short about of time I had Porsha helping me with my ordered and she was very present to work with and she found what had happened to my order and then said they will have it sent out to me straight away, within two days I had received my order and all was good in my world. if this had been any other company they would have taken forever on handling my issue and then say it was not their fault. She had taken owner ship of the issue and fixed straight away. If all other companies have employees that could be this great in customer service they would have returning customers. I would recommend Signal Dynamics to any and all riders. To go one step more, Porsha was able to help me with an issue I had once I had connected the head light module up, it was not working as stated in the instructions, and I had all the plug and play cables hooked up correctly and it still would not modulate. within a minute, she asked a couple of questions and then told me I had correctly connected it and that it was an issue with the day light sensor. Porsha asked me to short the two wires to trick the sensor and that the light would start modulating. I went to my bike and did what she said and like magic it started working as I expected. I was so thankful that this woman could not only troubleshoot my issue, but she was even able to tell me how to fix the issue to make sure it was the sensor. Then she said they would send me a new sensor right away. Moreover, I received the new sensor within two days. I will only buy from this company from now on.

  5. Safety of the rider is priority 5 Star Review

    Posted by on 21st Aug 2017

    The device is a 15 minute install, which is a plug and play device. The ability to turn the modulation off with the headlight control switch makes the device very appealing.
    Very easy to see the impact it makes with traffic.

  6. 2016 SuperLow 5 Star Review

    Posted by on 25th Jul 2017

    Took a little modifying, but very happy with my results!

  7. works great once harness repaired. 4 Star Review

    Posted by on 16th Jul 2017

    The adapter harness had a pin that was not fully pushed into position causing the headlight fuse to blow.

    Once I trouble shot the harness and repaired it, all worked well.

  8. signal Dynamics Headlight Modulator is the best 5 Star Review

    Posted by on 1st Jun 2017

    This is the third Signal Dynamics headlight modulator I have owned. Two were for dual headlights, and the last for a single headlight. I like theSignal Dynamics modulator because it works on either low beam or high beam. I leave it on low, and it still grabs the attention of drivers. Being plug and play, installation is simple. On my scooters, I just reached under the fairing, and plugged the adapters in. Zip tie the sensor to the fork, and done. The modulator install on my CTX700 was a little different, having to open the headlight nacelle, but still only a couple of minutes.
    The first two Signal Dynamics modulators I bought, I had for 4 years, before I sold the bikes, with the modulators. Never a problem. So I expect this unit to be just as good. The modulator should be the second thing you buy, after a good helmet. Both items will save your life.
    Mark Czajka

  9. It's best to be SEEN ! 5 Star Review

    Posted by on 18th May 2017

    Great Product ! After I almost got run over by some dumbass (probably texting), I decided I needed to be more visible out there, and this is THE best way to do it.
    It was an easy install and worth the money to prevent someone who isn't paying enough attention from ruining your day !

  10. Not Really Compatible 1 Star Review

    Posted by on 27th Mar 2017

    Even though my bike was listed, this was not really compatible. There should have been information on the alternate install instructions, that tell you it may not fit in the headlight bucket. Had I known, I would not have purchased it. The tape for mounting the unit elsewhere on my bike did not even hold. And the harness wires would have been exposed, or needed to be wrapped. The safety aspect is undeniable, however I need to go with a product that has a better overall fit.

Showing reviews 1-10 of 17 | Next