The Problem: The heat generated by modern OE automotive light bulbs can melt the bulb’s wiring harnesses.
Melted connector caused by heat from OE light bulb
Our Response: To prevent melting, our Headlight Wiring Harnesses have high-temp connectors that can withstand extreme heat. The wiring harnesses also have 14 gauge wire for better conductivity and a “plug & play” feature that lets you plug the wiring harness right between the factory harness and new bulb. You can even use the wiring harness as a pigtail if the original connector is melted. Our line of headlight wiring harnesses covers the following high-temp bulbs: H1, H3, H4, H7, H11, 9004, 9005, 9006, 9006XS, and 9007.
TechSmart Tip: While you’re upgrading the wiring harness, our technicians recommend upgrading the bulb.
This video goes over the procedure on installing a High-Temp Headlight Wiring Harness on a 4.6L Ford vehicle.
To learn more about what causes headlight harnesses to fail, read our article from ASE-certified Master Technician Ryan Kooiman: There's More Than One Way to Melt a Headlight Harness.