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H4 headlight relay harness kit in boxed packaging

United Pacific Industries

United Pacific Industries H4 Headlight Relay Harness Kit 34263

SKU CH-R90B-C0340

H4 headlight relay harness kit simplifies installation with pre-wired connectors and measures 8.2 x 3.7 x 2.3 inches weighing .92 lbs

  • Product typeInstallation Tools
  • H4 relay harness delivers full battery voltage to headlights
  • Compact 8.2 x 3.7 x 2.3 inch kit fits tight engine bays
  • Lightweight 0.92 lb assembly adds minimal load to wiring
  • Part 34263 includes relay and connectors for direct installation

H4 Headlight Relay Harness Kit 34263

This United Pacific Industries kit provides a dedicated relay harness for H4 headlight installations. It supplies the electrical accessory needed to manage headlight power distribution directly. The component suits vehicle owners upgrading or repairing factory wiring with a plug-and-play solution.

Sustained load behaviour

The relay harness routes headlight current through a dedicated circuit, reducing voltage drop during extended night driving. Continuous operation keeps the factory switch and wiring from overheating under prolonged high-beam use. The 8.2 x 3.7 x 2.3 inch housing weighs .92 lbs and fits within standard engine bays. Builders needing multi-lamp arrays or CAN-bus integration will require additional modules not included here.

How it compares

Measured against everything we stock in Car Audio Accessories & Wiring, at today’s prices. Recalculated every night.

Price $45.99
Pricier than about 72% of the 2,768 comparable items (median $21.99).

Specifications

Product
Brand nameUnited Pacific
Product typeInstallation Tools

Questions about this item

Does the relay harness generate noticeable heat or draw extra power during extended night driving?

The kit adds a fused relay circuit that carries the headlight current directly from the battery, so the original switch only triggers the relay coil and runs cooler on long trips.

What existing wiring or connectors must my vehicle already have for this H4 harness to plug in?

Your vehicle needs factory H4 headlight sockets; the kit includes male and female H4 plugs that mate with those sockets and a ring terminal for the battery positive post.

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