2709 N Hayden Island Dr, STE 809689, Portland, Oregon, 97217 USA
MotoHorn User Manual for Vehicles
PACKAGE CONTENTS
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15x
MotoHorn trumpet air horn
MotoHorn 12V compressor
Mounting plate
Air line
Relay with 30A fuse
User manual
Wire connectors (5 extra)
12 & 18 AWG Wire
Bolts and rubbers for mounting
Repeat the wiring steps to add additional MotoHorns
SAFE INSTALLATION
- Follow this user manual.
- Power off your vehicle before the installation.
- Do not install MotoHorn directly to the stock horn wires, use 12 AWG wire.
- Wire connectors are heat shrinkable, do not use open flame near your vehicle.
- The air line can be extended without any loss of performance.
- Avoid hard bends on the air line to provide free air flow.
- Keep the compressor away from parts that produce a lot of heat.
- TIP: Keep your stock horn connected to its wires when wiring MotoHorn. This way both horns activate at once for the best multi-tone effects.
If you follow the next steps, no mechanical or electrical knowledge is required
MOUNTING THE HORN
- MotoHorn trumpet can be unscrewed from its base, tighten it securely.
- Use the provided mounting plate for easier installation.
Mounting examples:
See the Review Section →
The most common mounting spots with picture examples below:
- Behind the front grille
- Inside the engine bay
- Front frame area
- Below the vehicle
- Behind the front bumper
- Attached to any bolt on your vehicle.
MOUNTING PLATE
You can attach the trumpet to the plate and use its center holes to install it on your vehicle. We also provide the bolts and vibration damping rubbers that you can use.
MOUNTING THE COMPRESSOR
The compressor has a small bolting edge and can be bolted down to any available bolt. You can mount it close to the trumpet or extend the air line if necessary.
WIRING THE HORN
12 AWG WIRE IS THICKER WIRE
18 AWG WIRE IS THINNER WIRE
Crimp the connectors tightly and use a heat gun or a lighter to shrink them around the wire. Don’t use open flame near your vehicle.
If you wish to install multiple horns, then simply repeat the same wiring steps again and use a separate relay.
INSTALLING THE RELAY
We recommend keeping the relay closer to the battery and in a dry area. Relay pins are numbered.
Use red connectors and 18 AWG wire:
- Connect pin 85 and 86 to your stock horn wires.
- The positive and negative can be switched up on these pins.
The relay has a green built-in fuse, make sure it is seated properly.
Your relay is now operational.
FINAL CONNECTIONS
Use yellow connectors and 12 AWG wire:
- Connect pin 30 to your battery positive.
- Connect pin 87 to your compressor positive.
- Connect compressor negative to the battery negative, or ground it to frame.
Congratulations! Your MotoHorn is ready to use!
ALTERNATIVE WIRING METHODS
(Optional and not required)
Auxiliary switch wiring
Your vehicle’s factory auxiliary switches can be used to connect MotoHorn(s) to your stock horn button.
You will need to have at least one auxiliary switch with a 20A+ rating to control a single MotoHorn, or multiple switches for multiple horns.
Use 12 AWG wire for the relay pin 30:
- Follow STEP 2 connections, except the relay pin 30 connection.
- Connect relay pin 30 to your auxiliary switch output.
Done! Your MotoHorn is now only active when you press the steering wheel button and the auxiliary switch is in the ON position.
Toggle ON/OFF switch wiring
If you wish to have an option to connect MotoHorn(s) to your original horn button when desired, a toggle switch can be added.
This switch should be installed on one of the wires linking your stock horn wire to the MotoHorn relay.
Use 18 to 22 AWG wire:
- Follow STEP 2 connections.
- Unconnect pin 85 or 86 from one of the stock horn wires.
- Connect one side of the switch to the stock horn wire.
- Connect other side of the switch to pin 85 or 86.
Done! Your toggle switch now cuts out one of the relay sides, making your MotoHorn active only when desired.
Repeat the steps if you have multiple MotoHorns.
New horn button wiring
If you wish to wire MotoHorn(s) under a completely separate circuit, a new horn button can be added.
Use 18 to 22 AWG wire:
- Follow STEP 2 connections, don’t connect the pin 85 and 86 to your stock horn wires.
- Connect pin 85 to your battery negative.
- Connect pin 86 to your new horn button.
- Connect your new horn button to your battery positive.
Done! Your new horn button now carries battery positive to your MotoHorn relay, making MotoHorn active when you press the button.
Repeat the steps if you have multiple MotoHorns.
Need help? Email us:
support@motohorn.com