VXO4840B
INSTALLATION GUIDE
PAGE 4 of 5
ELECTRICAL CONNECTION
COMPRESSOR
The red wire of the compressor should be connected 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
and to use the included fuse for circuit’s
protection.
Attach the black wire to any of the Pressure Switch’s connections located on the air tank.
The remaining Pressure Switch connection should be attached to ground. Secure the end to any metal body
or to the negative side of the vehicle’s battery. 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.
WIRING USING 4-PIN RELAY
