VXH1608B
INSTALLATION GUIDE
PAGE 1 of 3
BEFORE BEGINNING YOUR INSTALLATION
Read through the instruction guide before getting started with the installation. Professional installation is recommended for
this product.
CONTENTS
Dual-Tone Air Horn (Black)
4-PIN 12V/30A Relay
Mounting Hardware
SAFETY INSTRUCTIONS
Avoid dismantling this horn’s electrical elements.
Avoid touching compressor components with your bare hands immediately after or during use.
Avoid setting up any parts of the horn where there is a risk of falling off or risk of coming in contact with water.
Avoid reaching out to touch or pick up any fallen or water submerged parts.
Set the horn up for use only in areas with adequate ventilation.
Avoid sounding the air horn when in close range to your ear(s) or the ear(s) of others.
Make sure your battery ground is detached before getting your installation started.
Employ equipment for eye protection during drilling operations.
Ensure that your air system has no pressure before starting the installation.
The specific voltage requirement for this horn is 12 volt DC, therefore installation must be done to a DC power
source of 12 volts.
VXH1608B
INSTALLATION GUIDE
PAGE 2 of 3
MOUNTING
First, choose the location on the motorcycle where the product will be mounted. In doing so, make sure the
area is protected from water that can spray from tires and road debris. Make sure that the horn is mounted
such that the cylinder is vertical while the horn faces downwards. The variance from the vertical position
should be no more than 25 degrees.
After choosing the location, drill a 5/16” hole to secure the horn.
Once the above has been done, the bolt head can then be installed into the slot of the mounting bracket and
the horn secured using the lock washer/nut provided.
ELECTRICAL CONNECTIONS (FACTORY HORN SWITCH)
For vehicles with a two-terminal factory horn, transfer the wires to the compressor’s terminals. If the horn
doesn’t sound even if the compressor motor turns on, simply reverse the wires.
For vehicles with one-terminal factory horns, make sure you transfer the wire to the compressor’s positive (+)
terminal. The negative (-) terminal uses a 16-gauge wire or heavier to connect to ground.
ELECTRICAL CONNECTIONS (NEW HORN BUTTON)
In a dry location, install the relay provided making sure that terminals face downwards near the horn.
Using a 16-gauge wire or heavier, connect PIN 87 of the relay to the positive (+) terminal of the compressor.
Connect PIN 85 of the relay to the horn button (not provided). The other horn button terminal is attached to
any rust and paint free metal to ground. Connect using an 18-gauge wire or heavier.
Connect PIN 30 and 86 of the relay to the battery, alternator or other positive (+) of 12-volts. Make sure the
wire used is a 16-gauge wire or heavier. Use a 20A fuse (not provided) to protect the electrical circuit.
RELAY TERMINAL CONNECTIONS (RECAP)
PIN 87 is connected to the positive (+) horns terminal of the compressor.
PIN 85 is connected to horn button.
PIN 30 and 86 are connected to a positive (+) 12-volts power source protected by a fuse.
VXH1608B
INSTALLATION GUIDE
PAGE 3 of 3
ELECTRICAL CONNECTIONS (MOTORCYCLE FACTORY TWO-WIRE HORN SWITCH)
Disconnect both wires from the factory horn.
Attach PIN 85 of the relay to any of the wires on the factory horn.
Next attach PIN 86 of the relay to the remaining wire on the factory horn.
Use a positive (+) 12-volt battery or alternator to connect PIN 30 of the relay. Make sure you use a 16-gauge
wire or heavier and a 20A fuse (not provided) to protect the electrical circuit.
Using the minimum 16-gauge wire, connect PIN 87 of the relay to the compressor’s positive terminal found at
its bottom.
Again, using no less than a 16-gauge wire, connect the compressor’s negative (-) terminal found at the
bottom to ground, any rust and paint free metal body bolt or the negative (-) battery post.
RELAY TERMINAL CONNECTIONS (RECAP)
PIN 85 is connected to one of the wires of the factory horn.
PIN 86 is connected to the remaining wire of the factory horn.
PIN 30 is connected to a positive (+) 12-volts power source protected by a fuse.
PIN 87 is connected to the positive (+) horns terminal of the compressor.
IMPORTANT: The relay provided with this horn kit should be used to protect the wiring and the button switch of the
factory horn. Most manufacturers of motorcycles do not provide a relay in the horn circuit because original factory
horns draw less amperage.
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