GlowShift 7 Color 3,34 Inch Series Tachometer - Manual

7 Color 3 ¾ Inch Series Tachometer
For Product Numbers: GS-C709, GS-T709 and GS-W709
Wire Color Code
Yellow: 12v Constant Source (+) (un-switched) Orange: 12v Switched Headlamp Source (+) (optional)
Red: 12v Ignition Source (+) (switched) Green: Connects to Vehicle’s Tachometer Source
Black: Vehicle Ground ( - )
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 yellow wire to a
positive 12 volt constant (un-switched) source either on the vehicle or in
the fuse box.

Note: If you are connecting the yellow wire directly to the
battery, you MUST install a 3 amp fuse within 6-8 inches of the
battery connection.
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. 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
8. Reconnect the negative battery cable.

If your gauge(s) do not illuminate or do not recall your last saved
color, your switched and un-switched sources are reversed.

If your gauge(s) only illuminate red then the yellow wire for
constant source is not connected properly.

Be sure all of your wiring is correct to ensure proper gauge
operation.