H4 Headlight Relay Wiring Harness

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$44.02
42 In Stock
SKU
DIY-H4HLRH

If you are upgrading your Samurai or Toyota Pickup headlights to high output H4 bulbs or H4 LED you will need a conversion harness built just for this purpose.

High output bulbs require a relay style harness to deliver the necessary power.  Your factory wiring can not make the most of aftermarket bulbs.  Even worse, LED headlights are usually not designed to work at all with the ground switching system found on these models.  Most LED headlights will only function on one side or be stuck on High or Low.  

These are not the same harnesses that others are selling as "Universal" kits.  These are specifically designed to fix the problems in Samurai and Toyota Pickup headlight upgrades.  

This H4 Relay Harness will plug into the factory wiring harness on Suzuki Samurai and 79-85 Toyota Pickup and 4Runner.  These are able to provide the power needed for headlights from IPF, Hella, and others.  Simply hook up power and 2 grounds and then connect your old headlight plugs into this harness.

Features Fused and Relay protection for headlight harness.

NOTE:  Make sure your LED Headlights are intended for H4 applications.  This harness will not work with 4656 or similar bulb standards without some modification. 

⚠ WARNING Cancer and Reproductive Harm - www.P65Warnings.ca.gov

  • Fits H4 Bulbs
  • Robust 40Amp Relays

  • 1986 Suzuki Samurai
  • 1987 Suzuki Samurai
  • 1988 Suzuki Samurai
  • 1989 Suzuki Samurai
  • 1990 Suzuki Samurai
  • 1991 Suzuki Samurai
  • 1992 Suzuki Samurai
  • 1993 Suzuki Samurai
  • 1994 Suzuki Samurai
  • 1995 Suzuki Samurai
  • 1979 Toyota Pickup
  • 1980 Toyota Pickup
  • 1981 Toyota Pickup
  • 1982 Toyota Pickup
  • 1983 Toyota Pickup
  • 1984 Toyota Pickup
  • 1985 Toyota Pickup
  • 1986 Toyota Pickup
  • 1987 Toyota Pickup
  • 1988 Toyota Pickup
  • 1989 Toyota Pickup
  • 1990 Toyota Pickup
  • 1991 Toyota Pickup
  • 1992 Toyota Pickup
  • 1993 Toyota Pickup
  • 1994 Toyota Pickup
  • 1995 Toyota Pickup
  • 1984 Toyota 4Runner
  • 1985 Toyota 4Runner
  • 1986 Toyota 4Runner
  • 1987 Toyota 4Runner
  • 1988 Toyota 4Runner
  • 1989 Toyota 4Runner
  • 1990 Toyota 4Runner
  • 1991 Toyota 4Runner
  • 1992 Toyota 4Runner
  • 1993 Toyota 4Runner
  • 1994 Toyota 4Runner
  • 1995 Toyota 4Runner
  • 1982 Suzuki SJ410
  • 1983 Suzuki SJ410
  • 1984 Suzuki SJ410
  • 1985 Suzuki SJ410

See wiring diagram for details.

All products carry our 12 Month Limited Warranty. All warranties are limited to the original purchaser and are not transferable to subsequent owners of the product. The warranty period begins on the purchase date. Trail-Gear warrants that it will repair or replace, free of charge, any eligible product which, under normal conditions of use and service, proves to be defective in materials or workmanship. This warranty does not cover any labor costs incurred in diagnosis of defects, removal or reinstallation of a product, nor does it cover any other consequential expenses.

Please read and review our return and warranty requirement document before sending in products.

Warranty Exclusions


Trail-Gear Inc. warranty does not cover, and Trail-Gear Inc. shall not be liable for, any undertaking, representation, or agreements made by dealers or other third parties selling Trail-Gear products, except where such agreements are within the provisions of this Warranty.

Specifically excluded from this warranty are failures caused by lack of maintenance, misuse, negligence, modification, abuse, improper application, crash damage, installation or operation, or failures caused by unauthorized service or use of unauthorized parts.

Additionally excluded from this warranty are parts which are subject to normal wear and tear, such as bushings, fluids, hoses, gaskets, belts, etc. Products not manufactured by Trail-Gear Inc. are excluded from any warranty and shall be handled with the original manufacturer.

All parts used in a competitive racing environment are excluded from this warranty. If, after inspection, a part returned, under any warranty, is deemed to be ineligible for warranty repair or replacement, the part may be repaired or replaced for a discounted cost. Return shipping charges will apply. Any part for which a warranty replacement is sought must be returned to Trail-Gear Inc. before any replacement items can be shipped. All replacement parts shipped before the suspect part has been received and evaluated by Trail-Gear, MUST BE PAID IN FULL. In such a case, after the suspect part has been received and approved for a warranty replacement, the purchase price for the replacement will be refunded.

    To begin your warranty claim:
  • Please contact Trail-Gear Inc. at 559-252-4950 or email sales@trail-gear.com prior to returning any product under warranty to verify that warranty is still in effect.
  • Products must be shipped back to Trail-Gear Inc. at the expense of the customer.
    Ship all products to:
    ATTN: WARRANTY
    5356 E. Pine Avenue
    Fresno, CA 93727.
  • Please place a clearly marked copy of the original invoice inside the package.
  • Please include a short note stating the problem you are experiencing.

If any of the above mentioned policy is not met, the package will be refused or warranty claim denied. By completing the steps above, this will ensure faster processing of your claim so that Trail-Gear can get your product back to you as quickly as possible. All warranties are generally processed within 2-3 business days of Trail-Gear receiving the parts from you. Additional delays may be incurred if product needs additional testing or repairing.

If you are an international customer, please email the warranty department at sales@trail-gear.com to receive further instruction. International customers may have the option to field destroy an approved warranty to avoid costly return shipping. In this case, any shipping charges for replacement parts will be at the expense of the customer.

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