GlowShift Vacuum Pressure Gauge - Manual

Tinted Series Vacuum Gauge
For Product Numbers: GS-T03
Wire Harness Color Code
Red: 12v Ignition Source (+) (switched) Orange: 12v Switched Headlamp Source (+) (optional)
Black: Vehicle Ground ( - )
1. Disconnect the vehicle's negative battery cable.
Gauge Installation
2. Run the vacuum line from the gauge through the firewall.
 Note: Make sure the vacuum line is not pinched; the
use of a rubber grommet through the firewall is
required.
3. Cut any vacuum line and insert the included T-fitting
between the two cut pieces of vacuum line. Insert
accordingly so that the intersecting cross piece of the fitting
with the brass pressure restrictor is left to be connected to the
vacuum gauge line.
 Note: If a vacuum line is not available to cut, you
may need to purchase a brass barbed fitting (with
restrictor) to install into the intake manifold to obtain
a vacuum pressure reading. This fitting can be
purchased at www.GlowShift.com.
Connecting the Power Wire Harness
4. To make the wiring of your gauges easier you can
purchase an expandable circuit. This component easily fits
into your fuse panel and provides an additional fused power
wire for accessories such as gauges. The expandable circuit
is available for purchase at www.GlowShift.com.
5. Using automotive grade wiring (18 gauge); connect the red
wire to a positive 12 volt ignition (switched) source. It may be
connected to the fuse panel, an accessory wire, or any positive
12 volt source that turns on and off with the ignition.
6. Using automotive grade wiring (18 gauge); connect the
black wire to any good (unpainted) ground connection. You
may also route a wire directly to the negative side of the
vehicle’s battery.
7. The Night Time Dimming feature decreases the brightness
of the gauge face by 30%. Connect the orange wire to the 12
volt positive headlamp source. This allows the mode to be
activated when the headlights come on. This step is optional
and will not affect operation of the gauge if it is omitted.
 Note: Do not connect the orange wire to a dimmer
wheel. This will cause the gauge lighting to flicker.
8. Reconnect the vehicle's negative battery cable.
 Power on the vehicle to ensure the gauge is
functioning properly.