










🔧 Upgrade your ride’s lighting game—plug in, power up, and never look back!
The BICYACO H13 to H4 Adapter Connector is a premium, plug-and-play wiring harness designed for Jeep Wrangler JK/TJ and various trucks. Featuring heat-resistant nylon plugs and high-efficiency copper wiring, it prevents error codes and ensures seamless compatibility with aftermarket LED and HID headlights. Durable, corrosion-resistant, and easy to install, it’s the perfect upgrade for a flawless lighting system.



















































| ASIN | B07H31B43W |
| Best Sellers Rank | #58,733 in Automotive ( See Top 100 in Automotive ) #213 in Automotive Replacement Electrical Wiring Harnesses |
| Brand | BICYACO |
| Connector Type | Nylon/Copper Connector |
| Date First Available | August 10, 2017 |
| Is Discontinued By Manufacturer | No |
| Item Weight | 2.15 ounces |
| Item model number | 5823984982 |
| Manufacturer | BICYACO |
| Material | Copper, Nylon |
| Package Dimensions | 4.84 x 2.72 x 1.61 inches |
| UPC | 680491812193 |
T**Y
Great fit and function
Great product. Converted Harley 2 plug headlight to a single plug. Fit and function was great
K**S
Great product
Product works perfect
C**N
Thumbs Up
Good quality, and fast shipping. Plug and play to convert my stock 2021 street glide headlight to an led light.
S**E
High and low beam are backwards
This works great when adding a led headlight to your Harley. Just be aware that you will need to de pin the three prong and install the two positive wires opposite from how they arrive. This seems to be a common theme for the led conversions. Several videos on line to show you how. Still easy and works great.
S**E
Never enough bike parts
Perfect fit, great value, easy to install, good quality, much brighter than stock light and performs better than the harness that came with the light
A**N
Harley adapter
Exact part i needed to make an LED light work on my Harley
J**P
Failed after a few months of use.
I have placed 2 orders total for BICYACO H13 to H4 Adapter Headlight Adapter Connector. 2 connectors each come in the box. 3 connectors have failed after only a few months of service. #4 has intermittent problems now. BICYACO NOT GOOD. ZERO stars.
B**E
Not weather sealed
I purchased these to replace the set that came with aftermarket headlights for a 2014 jeep wrangler. One light was flickering and sometimes wouldn't work at all. Found corrosion on the h13 side of the plug. The h13 side of the plug isn't sealed and allows moisture in, creating corrosion. These harnesses are the same way and I added some electrical tape to prevent most moisture from corroding it. Other than that, they work flawless.
J**N
Works Great Easy install
R**T
Need to have this adaptor to go from stock to 3rd party. Ultra limited 2015. You do need to change the blue and white wires though.
1**1
One side dosent work
N**N
Does the job
M**O
Doesn't fit on Street Glide 2016, false advertisement...
Trustpilot
2 weeks ago
1 month ago