|Product: Single trumpet MotoHorn™ with 12V compressor
Fitment: Cars, trucks, boats, motorcycles and other vehicles with 12V power supply
Package Includes: Single trumpet MotoHorn™, 12V air compressor, air line, bag of fixings, user manual
Working voltage: 12V
Working current: 20A
Before the installation
How to install, basics
How to wire your MotoHorn™
Wiring your MotoHorn™ is easy and requires following just 5 steps. We recommend using the relay method explained below to get the loudest results.
Relay is basically a magnetic switch that is installed on new 12 gauge main wiring, it allows you to use thin stock wiring to control as many MotoHorns™ as you like.
Recommended parts: 12 gauge wire, 20-40A 4 or 5 pin relay, 20-40A inline fuse, and some crimp terminal connectors so that you can easily plug it to the compressor/relay pins. You can get all of these from any automotive store.
Using a 20-40A 4 or 5 pin relay. This connection uses relay to engage the main 12 gauge wiring.
Relay pins are universal and have the same number markings. If you are using a 5 pin relay, pin number 87a can be left blank:
Your main 12 AWG wiring is now done. Now your relay needs to be activated by the stock horn wire or by a new switch. You can use any wire size:
Here is a link to a YouTube video that explains relay and connections to it really well, this video is not ours:
Connecting 2+ MotoHorns™
Installing multiple MotoHorns™ is easy. For main wiring, wire each horn separately with their own 12 AWG wire and a relay. To control all of these horns under the same button, connect every relay’s pin 86 to the same stock horn or new button wire.
Common mistake happens here: Don’t split the 12 gauge wire between the compressors. Each compressor needs its own 12 gauge wire for 20A of current. If you are installing 4 horns, then you should have 4 separate 12 gauge wires coming from the battery “+”.
Common problems and maintaining your horn:
Problem description: MotoHorn™ works only once and you have to restart the vehicle for it to work again.
Solution: Your wiring is too thin for 20A of current, please follow the relay and 12 AWG wire installation method.
Problem description: Horn not working at all/very weak sound.
Solution: Test out the compressor straight on a battery with some 12 gauge wire. If the compressor works, then the problem is either the wiring or the air line has been blocked.
Problem description: After a very long-term use, grease may clog up in the air compressor and it starts blocking the air flow. Your MotoHorn™ sound is then compromised.
Solution: Pour machine oil into the air compressor through the air tube, then honk the horn until all grease gets blown out from the compressor.