GlowShift Digital Series Vacuum Gauge - Manual

Digital Series Vacuum Gauge
For Product Numbers: GS-BD03 and GS-RD03
Wire Harness Color Code
Red: 12v Ignition (switched) Source (+) Green: Connects to White wire on Pressure Sensor
Orange: 12v Dimmer (switched) Source (+) (optional) White: Connects to Green wire on the Harness
Black: Vehicle / Engine Ground (-)
1. Disconnect the negative battery cable.
Vacuum Pressure Sensor Installation
2. To install the vacuum pressure sensor, cut any vacuum line
and insert the included T-fitting between the cut vacuum lines.
Once the T-fitting is installed, connect the vacuum line, with the
air filter connected, to the digital vacuum pressure sensor.

Note: Be sure that the vacuum pressure sensor is
mounted in a dry location either to the firewall or inside
the cabin.
Connecting the Power Wire Harness
3. Route the vacuum sensor wire harness from the back of the
gauge through the firewall to the vacuum sensor mounting
location. Next, couple and secure the green wire on the wire
harness to the white wire on the vacuum pressure sensor. Now
you can connect the red wire on the vacuum pressure sensor to a
positive switched 12 volt source and connect the black wire to
any good (unpainted) ground location.

Note: Be sure to use a grommet when routing wires
through the firewall to protect them from being cut or
damaged.
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.