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VXO8410/4124C 

INSTALLATION GUIDE

 
 

 

PAGE 4 of 5

 

 

ELECTRICAL CONNECTION 

ON-BOARD AIR SYSTEM 

  The red wire of the on-board system coming from the bottom of the tank should be connected using the 

provided fuse to (+) 12-volt power source. 

IMPORTANT

: To prevent the compressor from over running and 

possible damage due to an air leak, 

connect the compressor’s red wire to a power source in the vehicle that 

only gets power when the vehicle’s ignition is on. Recommended connection points are: windshield wiper 
motor, blower motor or an accessory terminal on the fuse panel. Make sure to use wire that is as heavy as the 
wire of the compressor. 

  The black wire of the on-board system coming from the bottom of the tank should be connected to ground. 

The ground connection should be rust and paint free. 

  Your compressor is now set for use and will turn on automatically when air pressure in the air tank falls. When 

air pressure reaches maximum PSI, it will turn off. If the compressor fails to reach the maximum air pressure 
of the tank, which is the Pressure Switch's cut OFF pressure, check all air connections for leaks. While the 
compressor is pumping, use soapy water or any bubble solution to perform this check. In case the leak 
remains after tightening, re-apply thread sealant. 

 

IMPORTANT

: Never touch fittings, connecting tubes or the air compressor with bare hands either during or 

shortly after use. 

 
HORN (SOLENOID) 

USING NEW HORN BUTTON 

  Connect one of the electric 

valve’s wires to the positive (+) terminal of the battery, alternator, etc. This circuit 

should be protected using a 10A fuse (not provided). 

 

Connect the second electric valve wire to one of the Horn Button’s connections. The remaining connection of 
the Horn Button must be connected to ground. 

 

 

 

USING VEHICLE’S HORN SWITCH 

 

First, determine the switch’s polarity. The horn of most vehicles sends a negative (-) signal which can be 
confirmed by connecting one of the probes from an ohm meter to the wire of the horn while connecting the 
other one to ground. The meter should be at zero. This proves that horn circuit is negative (-). In case the 
meter reads anything other than zero ohms, test for voltage between the wire of the horn and the ground. A 
12-volt reading would mean a positive (+) horn circuit. 

 

Once you know the horn circuit’s polarity, connect any of the solenoid wires to the horn wire. 

  If you have a negative horn circuit, connect the remaining solenoid wire to a constant 12-volt power source. 

  If you have a positive horn circuit, connect the remaining solenoid wire to ground. 

Summary of Contents for VXO8410/4124C

Page 1: ...s of this product 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 Never leave this product unattended during use Intended for use by adults only During and immediately after use avoid touching any part of the compressor with bare hands as it is very hot during such periods Avoid sounding the air...

Page 2: ...r up the on board air system make sure you use a 12 gauge wire or thicker HORN MOUNTING Identify a suitable area for mounting preferably an unobstructed sheet metal surface like the frame or body of the vehicle so as to provide a firm platform which will help protect the horn from damage due to shaking Never attach the horn to any plastic or other flexible material Mark the spots for the holes wit...

Page 3: ...ressure reaches the cut OFF pressure 140 PSI the compressor will be automatically shut off In this system your Pressure Switch is already wired to the air compressor Do not modify this connection AIR PRESSURE GAUGE Your system includes a 140 PSI Pressure Gauge that will measure the air pressure of the tank The air pressure gauge is a sensitive part of the system please avoid dropping hitting or ti...

Page 4: ...y bubble solution to perform this check In case the leak remains after tightening re apply thread sealant IMPORTANT Never touch fittings connecting tubes or the air compressor with bare hands either during or shortly after use HORN SOLENOID USING NEW HORN BUTTON Connect one of the electric valve s wires to the positive terminal of the battery alternator etc This circuit should be protected using a...

Page 5: ...isture in horn Solution 1 Depressurize and drain the tank Solution 2 Relocate the on board air system to a drier location Issue Continual cutting off of Thermal overload protection Solution 1 Relocate the on board air system to a drier cooler location Solution 2 Replace the compressor Issue Excessive vibration or noise Solution 1 Tighten system components Solution 2 Replace the compressor Issue Lo...

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