H6054 H4 LED Headlight Wiring Harness Conversion Kit

About this item

Designed To Fix Problems Of Dim Headlight, Back Feeding Power, Flickering Headlight And Overheating Plugs And Overheating The Headlight Switch, Malfunctioning H4 9003 Headlights When Using Hi/Low Beams.

The key to why the H4 Relay Harness Kit is so effective lies in its design. By sending the current directly to the headlights from the battery, it bypasses the weak stock wiring, which often struggles with higher currents. This avoids the common dual ground problem that leads to voltage drops and dim lights in older vehicles.

Technical Specifications

Power Source

Voltage Range

6V (Min) - 15V (Max)

Voltage Drop

≈0.5V @20A

Power Capacity

240W Maximum

Current Rating

20A Continuous

Temperature Range

-40°C to +90°C

Conductor

14AWG Tinned Copper

Fuse Protection

30A Blade Fuse

Relay

80A 12V SPST (4-Pin)

Insulation

High-Temp Ceramic

🚗 Vehicle Compatibility

1985-1995 Toyota MR2(H6054)

1986-1992 Toyota Supra(H6054)

1982-1993 Toyota Celica(H6054)

1983-1987 Toyota Tercel(H6054)

1996-2002 Toyota 4Runner(H4)

1992-1995 Toyota 4Runner(9004)

1984-1991 Toyota 4Runner(H6054)

1984-1994 Toyota Pickup(H6054)

1995-1997 Toyota Tacoma(H6054)

1982-1991 Toyota Corolla(H6054)

Product Highlights

Industrial-grade ceramic socket prevents melting under high loads
Military-spec relay with 80A switching capacity
Oxygen-free copper wires with thick PVC insulation
Pre-installed waterproof fuse holder with 30A fuse
Universal 6-15V DC compatibility for vehicles/equipment

Complete Package

Fully assembled wiring harness
80A relay with dust cover
30A blade fuse (spare fuse included)
All necessary connectors
Illustrated installation guide