DualBeam Relay Harness – 1999–2004 Ford F250 / F350 Super Duty - Heritage Performance

The Heritage DualBeam Relay Harness upgrades your factory headlight wiring to provide stronger output, improved reliability, and proper beam operation.

This system converts factory operation from:

Low Beam → High Beam

to:

Low Beam + High Beam Together

When high beams are activated, low beams remain on — increasing usable light and forward visibility.

Built the Right Way

• Factory-style 9007 headlight connectors
• 12 AWG fused power lead direct to battery
• 14 AWG leads to each headlight
• Heavy-duty automotive relays
• Plug-and-play installation
• No cutting or splicing required

Why It Matters

Factory wiring on 1999–2004 Super Duty trucks was not designed for sustained dual-beam output or modern lighting upgrades.

The Heritage DualBeam system:

• Supplies full battery voltage to headlights
• Reduces strain on factory headlight switch
• Improves brightness consistency
• Protects aging wiring

Ideal for projector headlights, upgraded housings, halogen or LED conversions.

Fitment

✔ 1999–2004 Ford F250 Super Duty
✔ 1999–2004 Ford F350 Super Duty
✔ 9007 dual-filament headlight systems

Important Notice

This modification alters factory beam operation and is intended for off-road use only.