Read ( 9 ) Reviews

Signal Dynamics Corporation Plug and Play Harness Adapter

J&P Cycles Part Number: 445-957

Manufacturer Part Number: 01083


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Description for Signal Dynamics Corporation Plug and Play Harness Adapter

• This is the harness you need if your bike has an H4 connector on the headlight when installing the plug and play headlight module 445-956

• Will only work with a single headlight motorcycle

• Works with most Harley Davidson motorcycles or motorcycles that use a Dual Filament Bulb

Note: Requires the Plug and Play Headlight Module 445-956

Product Specs

Product Specs for Signal Dynamics Corporation Plug and Play Harness Adapter

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Fitment Note:

This item is a universal/custom fit component, and does not have any direct standard/OEM model application. Some items may require modification and an advanced level of mechanical skill and/or knowledge for installation.

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Customer Reviews

Customer Reviews for Signal Dynamics Corporation Plug and Play Harness Adapter

Overall Rating

5 out of 5 stars (based on 9 reviews)

5 stars (9)

4 stars (0)

3 stars (0)

2 stars (0)

1 star (0)

0 stars (0)


did not say in add that you had to use standed light bulb only, i had h4 up grade


Worked perfectly.


wrong one need the one for GL1800

JP Brown 63

Not used yet, wil get back to you later.


I couldn't believe how easy it was to install my headlight modulator with this adapter. Truly "plug and play"!




I ordered this part to install the modulation kit to my 2006 Street Bob. Overall it seems to be a good quality part to rely on. I haven't installed it yet due to lack of time but I checked it out when my order was delivered and both the modulation kit and this harness seem to be built pretty solid. The installation instructions seem fairly simple to do it yourself. It seems like it may be a tight fit for my headlamp with both the kit and this particular harness, but that could be a good thing if done securely to limit the movement of the parts when riding.


easy to install and works great. Thanks


Improves visibility, a great safety advantage.

Important Product Notes

Once opened, electrical items cannot be returned, except in the case of a manufacturing defect.

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