I see there is a connector in the picture that says "to headlamp socket" would that go into the original headlight socket? If so which side?

The black connector plugs into the female wiring socket that you removed from one of the headlights. The two yellow male terminals get plugged into the back of headlights. You will have to install the black connector into the headlight harness on the side nearest the battery. Mount the relays, battery feed and that side's ground strap in the same area. The long extension to the other headlight gets into the back of the headlight after you removed the terminal. Install that side's ground. That original female terminal that was on that headlight will no longer be used. Tape it up and secure out of the way.

Does this work with a 1986 Toyota pickup?

Yes it does I have it on my 88 4runner

Does this work on 2004 honda crv?

Probably don’t need it. This is for very old vehicles that Cannot regulate the amperage to the LEDs. If your LED lamps flicker when you install them, this should solve it though....... I think.

Will this relay kit work on a 1992 Dodge D-250 Diesel?

Sorry, the fitment said not fit your car.

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Partsam H4 9003 Headlight Relay Wiring Harness Kit Dual High Low Beam Headlamp w/High Heat Ceramic Plugs

Product ID: 273466877

Details

Auto part position
Rear
Brand
Partsam
Fit type
Universal Fit
Included components
1 x set of H4
Light source type
Xenon

⚡80A max current dual relays

🔌Pre-wired plug & play harness

🔥High heat ceramic plugs

€ 40.47

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Description

🚗 Brighten your ride, ditch the flicker, and drive with confidence!

BUILT IN SAFETY FUSE - Integrated fuse protects your vehicle’s electrical system from overloads, giving you peace of mind on every drive.
PLUG PLAY SIMPLICITY - Pre-wired harness means zero wire splicing—upgrade your lighting in under an hour with no electrical headaches.
HEAT RESISTANT DURABILITY - High-frequency ceramic plugs resist melting and overheating, ensuring long-lasting safety and performance.
UNIVERSAL H 4 COMPATIBILITY - Fits all H4/9003 headlight conversions and popular models like Jeep Wrangler YJ and Toyota Pickup for seamless integration.
POWER UP WITHOUT COMPROMISE - Dual 80A waterproof relays deliver robust, reliable current for brighter, flicker-free headlights.

The Partsam H4 9003 Headlight Relay Wiring Harness Kit is a premium upgrade designed to fix dim, flickering, and overheating headlight issues by delivering stable power through dual 80A relays and high-heat ceramic plugs. Compatible with a wide range of H4 headlights and vehicles, this pre-wired, plug-and-play harness enhances lighting performance and safety with an integrated fuse and corrosion-resistant materials.

Specifications

ASIN	B078XV8PL7
Auto Part Position	Rear
Brand Name	Partsam
Customer Reviews	4.5 4.5 out of 5 stars (532)
Fit Type	Universal Fit
Included Components	1 x set of H4 headlight relay wiring harness (with 2 ceramic plugs)
Item Weight	0.31 Kilograms
Light Source	Xenon
Manufacturer	Partsam
Manufacturer Part Number	GTCV-0440275598
Model Number	GTCV-0440275598
Number of Items	1
Number of Pieces	1
Set Name	H4 Relay Wiring Harness Kit
Voltage	12 Volts

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€ 40.47

Duties & taxes included

In stock

Sold byAmazon PortugalDelivered byDesertcartCustomer service byDesertcartReturns14 days · 30 with PRO

Buyer Protection · Full refund if your order doesn't arrive as described.

Desertcart purchases this item on your behalf and handles shipping, customs, and support to Portugal.

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Join PRO →

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TrustScore 4.5 | 7,300+ reviews

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