Owner manual

Digital Series Narrowband Air/Fuel Ratio Gauge
For Product Numbers: GS-BD02 & GS-RD02
Wire Harness Color Code
Red:
12v Ignition (switched) Source (+)
Orange:
12v Dimmer (switched) Source (+) (optional)
Black:
Vehicle / Engine Ground (-)
Gray:
Connects to your Vehicle’s Narrowband Signal Wire
1. Disconnect the negative battery cable.
Connecting the Power Wire Harness
2. Air / Fuel Ratio: Connect the gray wire to the vehicle
oxygen sensor signal, before the catalytic convertor. You
may connect this wire directly to the ECU harness or splice
into the signal wire leaving the sensor. This wire color can
vary, be sure to consult your vehicle’s owner’s manual.
(0v ~ 1v Output - NARROW BAND ONLY)
Note: If your vehicle does not have a narrowband o2
sensor, you will have to purchase a single wire
narrowband o2 sensor to complete this installation.
3. 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.
4. 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.
5. 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.
6. 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.
7. Reconnect the vehicle's negative battery cable.

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