GlowShift Digital Series Tachometer - Manual

Digital Series Tachometer
For Product Numbers: GS-BD10 and GS-RD10
Wire Color Code
Red: 12v Ignition Source (+) (switched) Orange: 12v Switched Headlamp Source (+) (optional)
Black: Vehicle Ground ( - ) Green: Connects to Vehicle’s Tachometer Source
1. Disconnect the negative battery cable.
Connecting the Power Wire Harness
2. Connect the green wire to the vehicle’s tachometer source wire or
negative side of the coil. You must consult your manual to ensure proper
location. If connecting to an aftermarket ignition system, be sure to
follow the manufacturer’s instructions for connecting a tachometer.
Please consult a service manual or mechanic before installing.

Tachometer Test Wire: Some vehicles may have a tachometer
test wire to obtain a tachometer signal from. Consult your repair
manual or licensed mechanic to confirm the location of this
wire.

Tachometer Adapter: It may be necessary to install a
Tachometer Adapter if you have a multiple coil system. You
can purchase a Tachometer Adapter from local auto parts store.

Tachometer Filter: It may be necessary to use a Tachometer
Filter if you vehicle has either a points style or HEI ignition
system. You can purchase a Tachometer Filter from
www.GlowShift.com

Note: Be sure to use a grommet when routing wires through
the firewall to protect them from stripping and damage.
3. 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.
4. 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.
5. 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.
6. Use the Cylinder Selection Switch on the back of the gauge to set the
number of engine cylinders on the tachometer to match that of your vehicle.
Do this before applying power to the gauge.

If you need to change the cylinder selection, you must remove power
from the gauge, make your selection, and then reapply power to the
gauge for proper calibration.
Switch # Cylinders
0 10
1 1
2 2
3 3
4 4
5 5
6 6
7 7
8 8
9 9
7. Reconnect the negative battery cable.