6126/6127 Air Horn & Compressor Package
Supplemental Instructions
The 6126/6127 air horn and compressor packages can be easily added to almost any existing automotive horn system.
Just follow these steps:
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Determine the polarity of your horn switch.
Most vehicles have a ‘negative’ horn circuit, which means that when the existing horn
button is pressed a ground signal goes through the horn wire. To determine if you have
this type of system, locate the horn wire in your vehicle and use an ohm meter to measure
the resistance from the horn wire to ground. When the horn button is pressed, the resistance
will be zero.
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Connect the relay
Your horn kit includes a relay, which is used to send power to the compressor when you
press the vehicle’s horn button. Connect the relay as shown below
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Make the rest of your connections
Connect the ‘-‘ terminal on the compressor to ground. It is also recommended that you add a 20 amp
fuse to the wire running from Pin 1 to your power source.
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