Find any Amazon.com product's deals and best prices with our free Amazon deal finder and price tracker. Simply paste the product link (URL) or search by name in the box above. You'll get full product information, Deal Score, and all current deals. Shop smarter with the best Amazon deals finder in the USA.
x
Sorry, Something went wrong!
Upgraded 4-Headlight Relay Wiring Harness
✅ In stock
F
Grade
⚠️ Price may have changed. Last updated 24+ hours ago — confirm on Amazon.
Check Deal at Amazon
Price verified Nov 4, 2026 2:36 PM · Prices & availability subject to change
Is This a Good Price on Amazon?
💤 Not a Deal- 💤Verdict: Not a Deal. Price is at or above historical norms. Best to wait for a sale.
- ➡️Pricing has held fairly steady, with no strong push in either direction.
How We Scored This Deal
Price Competitiveness
0/28
Recent Value
0/22
Market Standing
0/20
Deal Strength
0/20
Momentum
0/10
📝 Product Overview
🏪 Sold by
LKYM-US
📦 Fulfillment
Fulfilled by Amazon
🚚 Shipping
Free Shipping
Product Details
✓【Application】: This H4 Relay Harness Kit is designed to resolve Dim Headlights, Flickering Headlights, Power Backfeeding, and Malfunctioning Headlights when using Hi/Low Beams.It delivers a 30%–50% boost to headlight brightness for safer night driving.
✓【Material】: This 4 Headlight Relay Kit is built with thickened pure copper wires and heat-resistant ceramic socket plugs, designed to resolve issues caused by overloading the headlight switch and overheating plugs.
✓【Compatibility】: This universal headlight relay kit works with 4"x6", 7"x6", 5"x7", 5-3/4" headlights and other lights using H4 / 9003 / HB2 lamp bases.
✓【Easy to Install】: Fully inspected 4 Headlight Relay Wiring Harness comes with precisely matched pins for easy installation. Your stock headlight switch can still work normally to control the relay.
✓【Working Principle】:This H4 relay harness bypasses power-draining OEM headlight switch wiring. It pulls power directly from the vehicle battery while keeping your stock headlight switch to activate the relay for light control.
⚙️ Specifications
Brand
LanKaYiMeng
Material
Ceramic
Item dimensions L x W x H
2.5 x 0.72 x 7.5 inches
Connector Type
Ceramic
Number of Items
1
Brand Name
LanKaYiMeng
Manufacturer
LanKaYiMeng
Item Highlight
H4 Headlight Relay Harness Kit with Ceramic Sockets, Plug & Play, Fixes Dim & Flickering Lights
Unit Count
1 Count
Number of Packs
1
Included Components
1x 4-Headlight Relay Wiring Harness