How can you add/install this on an existing motorcycle horn?

Do not understand why you would want too. If your existing system need a relay due to high current draw the mfg would have added it when bike was manufactured. It will not improve your horn or make it louder or change the tone.

How much does the relay draw? not the horn output rating of 80a- the low current input side. (if it's under 10a i can use my existing horn button.)

The relay draws well under 10 amps. I use my horn button on a 2017 Tacoma with no problems at all.

How do you know which relay power cord is negative? And how do you hook that type connector to battery?

As described in the third picture, the blue wire and the white wire on the harness are respectively connected to the positive and negative poles of the horn wire of the original vehicle, the red wire is connected to the positive pole of the battery, and the black wire is connected to the frame.

How do you hook up the button to the farbin horn wiring harness relay kit? thank you.

Connect one line of the button to the blue line of the Farbin wire harness, connect the other wire of the button to the positive pole of the battery, and the white wire of the Farbin harness is grounded to the frame. Thank you for your support!

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FARBIN Air Horn Relay Wiring Harness Kit 12V 80 AMP for Car Truck Motorcycle (Relay 4 pin Single Horn Wiring Harness, 12V)

FARBIN Air Horn Relay Wiring Harness Kit 12V 80 AMP for Car Truck Motorcycle (Relay 4 pin Single Horn Wiring Harness, 12V)

Product ID: 214256006

Details

Connector Type
Wired
Contact Material
Copper
Contact Type
Normally Open
Current Rating
80 Amps
Mounting Type
Socket Mount

⚡80A high current capacity

🔌4-pin relay for easy wiring

🛡️Durable composite housing

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Description

🔊 Amplify your ride with power and precision!

PLUG PLAY SIMPLICITY - Color-coded 4-pin relay sockets make installation a breeze
COPPER CORE RELIABILITY - Pure copper coil and contacts ensure longevity with 10,000+ mechanical cycles
POWER THROUGH THE NOISE - Supports up to 80 amps for reliable high-current performance
UNIVERSAL COMPATIBILITY - Works seamlessly with all 12V automotive and motorcycle systems
BUILT TO BRAVE THE ELEMENTS - High-quality composite housing resists heat and harsh under-hood conditions

The FARBIN Air Horn Relay Wiring Harness Kit is a robust 12V, 80-amp relay solution designed for cars, trucks, and motorcycles. Featuring pure copper contacts and coil for superior conductivity and durability, it offers easy, color-coded wiring and a composite housing built to withstand extreme under-hood conditions. Perfect for high-current air horn setups, this kit ensures reliable performance and effortless installation across all compatible 12V vehicles.

Specifications

ASIN	B07TN68VZB
Best Sellers Rank	#11,505 in Automotive ( See Top 100 in Automotive ) #24 in Automotive Replacement Electrical Wiring Harnesses
Brand	FARBIN
Brand Name	FARBIN
Coil Voltage	12 Volts
Connector Type	Wired
Contact Current Rating	80 Amps
Contact Material	Copper
Contact Type	Normally Open
Current Rating	80 Amps
Customer Reviews	4.4 out of 5 stars 205 Reviews
Item Weight	3.52 ounces
Manufacturer	Ruian City Allrey E-Commerce Ltd.
Maximum Switching Current	80 Amps
Minimum Switching Voltage	12 Volts
Mounting Type	Socket Mount
Operation Mode	Manual
Part Number	FB-JDQ
UPC	791313532516
Unit Count	1.0 Count
Wattage	960 watts

Reviews

A**B

19.09.2023

A**R

13.03.2026

P**R

9.11.2024

M**R

21.10.2024

J**N

12.05.2024

J**R

10.05.2024

M**H

20.03.2022

J**R

20.10.2023

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