VXH2311C
INSTALLATION GUIDE
PAGE 2 of 2
COMPRESSOR MOUNTING
The ideal location for the compressor to be installed is a dry area inside your engine compartment where it
will be safe from exhaust and engine manifold heat.
To make the compressor firm and secure, drill a hole of 3/16".
IMPORTANT
: The compressor must be
mounted vertically (with air exhaust port facing downward).
Install the bolt’s head into the compressor housing’s slot. Tighten the compressor firmly to the vehicle with the
provided lock washer and nut.
AIR LINE INSTALLATION
Connect one side of the airli
ne to the compressor’s air exhaust port and the other side to the trumpet's barbed
fitting.
Do not make any sharp bends or kinks in the tubing which could alter the sound of the horn or even restrict
airflow.
IMPORTANT
: Airlines are sometimes already pre-installed. In such situation, ensure that they are inserted
entirely into the fittings on the trumpet and compressor.
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.
