VIAIR Illuminated Dash Panel Gauge (20065) - Manual (Page 4)

STEP BY STEP INSTALLATION:
1. Select mounting location with a rigid mounting surface such as the bottom edge of the
dashboard on either side of the steering wheel column. Use the gauge mounting panel as a
template to mark off 2 mounting points to be drilled. Drill two 13/64” diameter holes as marked.
Do not mount Gauge at this time.
NOTE: If you have existing 1/4” O.D. air line tubing routed, cut off a 1/2” to 1” section of air line
tubing from the tip of your existing air line before connecting the air line to the gauge as to
ensure that you have a fresh air line tip for connection.
2. If you do not already have a pre-existing 1/4” O.D. air line, measure the length of the air line
required to route from Gauge to Air Source. Use a length of 1/4” O.D. air line that is at least the
length you just measured. Do not cut your air line at this time. Remove only the collar of the
compression fitting from the back of the Dash Panel Gauge. DO NOT loosen or tighten the
body of the compression fitting which is permanently affixed to the air inlet of the gauge.
Insert the 1/4” O.D. air line through the compression fitting collar, then push air line onto the
barb of the compression fitting until the air line completely covers the barb. Tighten collar to
the body of the compression fitting with wrench. (See Fig. 1)
NOTE: When cutting air line, cut as squarely as possible. Use a hose cutter or razor blade. To
ease insertion of air line tubing into fittings, lightly lubricate the tip of the air line or soak air line
in warm water for about 5 minutes to soften the air line. When routing air line, always remember
to avoid sharp edges, heat source, and tight bends. Air line must be routed at least 12” away
from exhaust systems.
3. Temporarily place Dash Panel Gauge at mounting location and route the air line tubing on
the Dash Panel Gauge to your air source. (In a typical setup, your air source will be the air tank).
Measure and cut air line to appropriate length, connect air line to air source using the provided
1/8” (F) NPT compression fitting. (See Fig. 3 & 4)
NOTE: In some cases, a hole may be required to be drilled in the firewall to enable the air line
and/or wire to pass through the firewall to air and power sources. Make sure that the air line
tubing and wire is protected from sharp edges of the drilled hole.
A continuous grommet strip is included in your kit. Seat grommet strip around the edge of the
hole, measure and cut strip to appropriate length. Work the strip around the hole opening until
the slot in the grommet strip sits firmly all the way around the edge of the hole. It will be
necessary to seal any grommets or holes that have been cut or drilled so as to seal off the
elements from entering the cab area of your vehicle. Use cable ties, air line clips, and/or cable
tie brackets to secure air line and/or wire to the vehicle.
IMPORTANT: When drilling through the firewall, always make sure what is on the other
side of the firewall before drilling. Take care not to damage your vehicle’s electronic
systems/components when drilling.
4. The Illuminated Dash Panel Gauge comes with a built-in On/Off Switch, which is to be
connected to your pressure switch via the provided 20 Ft. lead wire. (See Fig. 3 & 4)
Your pressure switch should be connected to your relay and Dash Panel Gauge On/Off switch.
There are 3 insulated female terminal connectors included in your kit. If your pressure switch
has spade type push on connectors, attach the larger female terminal connector to one end of
the provided 20 Ft. extension lead wire (the end without the inline fuse). To connect 20 Ft.
extension lead wire to your pressure switch, simply push female terminal connector onto the
spade connector on your pressure switch. If your pressure switch has lead wires instead of
spade type connectors, simply attach provided insulated male terminal connector to your
pressure switch lead wire. Connect 20 Ft. extension lead wire by pushing the female terminal
connector onto the male terminal connector. (See Fig. 3 & 4)
USER MANUAL
200 PSI Illuminated Dash Panel Gauge Kit