This harness converts a 12-pin Bi-Xenon wiring loom into a 10-pin layout. Because OEM 12-pin female connectors aren’t available, this kit uses labeled wires and crimps so you can hardwire the conversion cleanly. It’s the solution if you want to run 10-pin aftermarket headlights (or OEM halogen-spec replacements) on a 12-pin Bi-Xenon harness.
 
Key Features
Hardwire conversion: cut your existing 12-pin harness and crimp into this adapter
All wires are individually labeled for easy identification
Adapts 12-pin Bi-Xenon wiring to 10-pin aftermarket / halogen headlights
Maintains standard functions: low beam, high beam, DRL, and markers
Works with MK4 (PQ34) and MK5 (PQ35) Jetta / Golf platforms
 
Fitment & Compatibility
Platforms: MK4 PQ34 and MK5 PQ35
Use case: adapting a factory 12-pin Bi-Xenon harness to 10-pin aftermarket or halogen headlights
Compatible with most aftermarket 10-pin housings (no AFS functionality is required since these lights don’t support it)
If unsure, send photos of your connectors or VIN and I’ll confirm before you order
 
Why Use This Harness
There’s no true “plug-and-play” 12-pin female to 10-pin adapter available. This harness gives you a proper hardwire solution with labeled wiring, so you can adapt your car cleanly instead of splicing randomly or replacing the entire loom.
 
Notes
Requires basic electrical skills and use of  crimps
Always disconnect the battery before cutting or crimping wires
Confirm pin orientation before finalizing the wiring
 
Installation Guide
 
Download Installation Guide (PDF)