FIGURE 5
RUBBER
GROMMET
FIGURE 6
SOLDER
CONNECTOR
VEHICLE
HARNESS WIRE
PIERCING
CLIP
CONNECTOR
LIP
UNLOCKED
TACHOMETER
WIRE
SPLICE
CONNECTOR
LOCKED
ELECTRICAL
TAPE
CRIMP ENDS
ELECTRICAL
CONNECTIONS
Refer to your vehicle service manual while
carefully following the wiring instructions.
CAUTION
For your own personal safety, and to
prevent possible damage to the
electrical system of your vehicle
during the installation, disconnect the
negative (-) battery cable. Reconnect
this cable after installation is complete.
BLACK, RED, AND WHITE
WIRE CONNECTIONS –
ALL SYSTEMS
Route all wires carefully. Securing them with
nylon tie wraps (not included) is suggested.
Do not route wires along or against sharp
edges which could cut the insulation. Also,
do not route them along hot engine sur-
faces, such as exhaust manifolds, where
high temperature could melt the insulation,
or near spark plug wires.
Route wires through an existing hole in the
firewall, or drill a 3/8" hole where desired,
making sure there are no hidden wires,
hoses, etc. that could be damaged. Insert
the supplied rubber grommet in this hole for
added protection against wire damage or
shorting (see figure 5).
0
1
2
3 4 5
6
7
8
Sun super tach
RPM x 1000
FIGURE 7
BLACK WIRE
TO GROUND
SEE THE GREEN WIRE
CONNECTION SECTIONS
OF THIS MANUAL
FUSE
BOX
RED TO
BATT.
VOLTAGE
TERMINAL
INSTRUMENT
LAMP
SPLICE
CONNECTOR
TO
DIMMER
SWITCH
1. Connect the BLACK wire to the negative
(-) battery terminal, or a clean unpainted
chassis ground using a ring terminal or
other suitable means (see figure 7).
IMPORTANT
Although electrical ground (BLACK wire
connection) is available under the dash-
board, grounding the instrument near or
under the dash may cause it to operate
erratically, as any ground connection other
than the negative (-) battery terminal may
be “electrically noisy”.
Make the following connections with splice
connectors, or by an alternative method if
desired (see figure 6).
2. Connect the RED wire to any vehicle
harness wire which is energized with
battery voltage ONLY when the ignition key
is in the ON (RUN) position, NOT OFF or
ACCESSORIES (see figures 6 and 7).
3. Connect the WHITE wire to the instru-
ment panel lighting circuit or any lead that
is controlled by the instrument panel
dimmer control (see figure 7).
NOTE
Some vehicles (typically imported) wire the
dimmer control into the ground side of the
instrument panel lighting circuit, as opposed
to the more conventional “hot” or twelve (12)
volt side. In vehicles which use this circuit,
connect the WHITE wire to a circuit which is
energized by the headlamp switch.
GREEN WIRE
CONNECTION
The GREEN wire provides
the tachometer with the
engine RPM (speed) signal.
If your vehicle's engine is
equipped with a DISTRIBU-
TOR IGNITION SYSTEM
proceed to the GREEN
WIRE CONNECTION -
DISTRIBUTOR EQUIPPED
ENGINES section in this
manual. If your vehicle’s
engine is equipped with a
DIS (DISTRIBUTORLESS
IGNITION SYSTEM)
proceed to the GREEN
WIRE CONNECTION -
DISTRIBUTORLESS
IGNITION SYSTEM
EQUIPPED ENGINES
section of this manual. DIS
equipped engines are
characterized by their lack of
an ignition distributor. In
place of the distributor, will
be one or more “ignition coil
packs”. Unlike the ignition
distributor which has a basically round
shape, the coil pack is typically a square or
rectangular package.
GREEN WIRE CONNECTION
DISTRIBUTOR EQUIPPED
ENGINES
Connect the GREEN wire to the negative (-)
side of the ignition coil. This terminal may
also be referred to as the TACH, TACH
TEST, DEC, or ECU terminal. Wiring
diagrams can be found in your vehicle
service manual. See the list at the end of
these instructions for service manual
sources.
GREEN WIRE CONNECTION
DISTRIBUTORLESS IGNITION
SYSTEM EQUIPPED ENGINES
Many domestically built vehicles (and some
imports) are now using a new type of ignition
system which does not use a distributor, but
instead, a system of multiple ignition coils, and
the necessary sensors and computer
controls to fire them in the proper order.
This type of system is commonly referred to
as a DISTRIBUTORLESS IGNITION
SYSTEM or DIS. Your tachometer is
designed to work with these systems,
however proper connection to them is
important. The BLACK (ground), RED (12-
14 volt supply), and WHITE (instrument
lamp) connections are the same as for
distributor equipped vehicles, however
connection of the GREEN (tach signal) wire
to the ignition is specific to the engine and
ignition system. Wiring diagrams can be
found in your vehicle service manual. See
the list at the end of these instructions
for service manual sources.
WHITE
SUNPRO GAUGES
CUSTOM GAUGES
