CYLINDER SELECTION
This tachometer should be checked for cylinder
setting before installation (see figure 1).
Position the
CYL
inder selector switch on the
rear of the tachometer so that the switch
actuator is opposite the number which matches
the number of cylinders in the engine.
For Chrysler DISTRIBUTORLESS IGNI-
TION SYSTEM CONNECTIONS
, connection
to Pin 43 of the Single Board Engine
Controller on Distributorless Ignition equipped
Chrysler vehicles requires that the
CYL
inder
selector switch be set to the four (4) cylinder
position, regardless of the number of
cylinders in the engine.
LAMP SUBSTITUTION OR
REPLACEMENT
Your tachometer is supplied with an automo-
tive type, wedge base (
full size tachometers
)
or subminiature wedge base (
mini tachom-
eters
) lamp, for illumination. This lamp should
provide satisfactory illumination intensity in
most applications, however the following
substitute lamps are available at your local
auto parts store, and may allow you to
custom tailor the illumination characteristics
of the tachometer to your application. Note
the higher the MSCD (Mean Spherical
Candela) of the lamp, the brighter it is.
LAMP #
MSCD
COLOR
BASE
73.3 CLEAR
SUBMINIATURE WEDGE
37
.5
CLEAR
SUBMINIATURE WEDGE
74
.75
CLEAR
SUBMINIATURE WEDGE
161
1
CLEAR
WEDGE
194
2
CLEAR
WEDGE
194A
-
AMBER COATED
WEDGE
168
3CLEAR
WEDGE
The lamp socket is located at the top rear of
the tachometer (see figure 1). To remove the
lamp, gently grasp the black lamp socket (use
pliers if necessary) and twist it counter-
clockwise approximately 1/8 turn until it stops.
Pull the socket with lamp straight out of the
tachometer housing. Remove the lamp from
its socket by pulling it straight out. Replace
the lamp as required following the chart
above. Reinstall the socketed lamp by rotating
it against the tachometers PC board until it
drops into place, and then rotate it approxi-
mately 1/8 turn clockwise until it reaches its
mechanical stop.
WARNING - SAFETY PRECAUTION!
Neither the driver nor any passenger
should compromise the safe operation
of the vehicle by attempting to readjust
the tachometer in any way while the
vehicle is in motion!
MOUNTING THE
TACHOMETER
Your tachometer is designed to be mounted
on top of or underneath the dashboard, or on
the steering column (see figures 3 and 4). If
you choose the steering column mounting
configuration, it will be necessary to obtain a
hose clamp which is large enough in
diameter to encircle the steering column. Cut
off any excess strap from the hose clamp,
when clamp mounting is complete.
CAUTION
Some steering columns are made to be
collapsible upon impact. Care should be
taken when tightening the clamp to
avoid damage to the column.
Be sure not to interfere with the movement
or mechanism of adjustable/tilt steering
columns.
Select a mounting location that allows a clear
view of the tachometer, but does not
obstruct access or view of controls, or view
of other dashboard instruments, or the road.
CAUTION
Position the tachometer in its specific
location and determine wire routing and
connection locations before drilling any
holes! Be sure to check behind areas of
intended drilling for obstructions before
drilling!
Mark hole locations, and drill holes as
required per the following chart.
# 8 Self-tapping screws #29 or 9/64" drill bit
# 8 Machine screw hardware #18 or 11/64" drill bit
Clearance hole for wiring harness 5/16" drill bit
Once the tachometer is adjusted to its final
position, securely tighten all hardware.
FIGURE 2
FIGURE 3
FIGURE 4
HOSE CLAMP
RED LINE/
SHIFT
POINTER
RUBBER
PAD
RED LINE / SHIFT POINTER
Adjust the
RED LINE/SHIFT POINTER
by
sliding it around the meter bezel (see figure
2). This pointer may be set at any point on the
meter scale, such as engine red line, or
transmission shift point.
NOTE
FUNCTIONAL QUICK CHECK
Although every attempt has been made to
make this tachometer electronically compatible
with as many different ignition systems as
possible, new ignition systems are being
developed continually. It is suggested
(especially if you have an engine that has a
non OEM, or aftermarket ignition system) that
the tachometer be electrically connected to
the vehicle, (using alligator clip leads or other
suitable means) following the steps below,
and an electrical functional check of the
tachometer be made, prior to making a
permanent installation.
1. Clip the
BLACK
lead from the tachometer
to the negative (-) battery terminal.
2. Clip the
RED
lead from the tachometer to
the positive (+) battery terminal.
3. Clip the
GREEN
lead from the tachometer
to the negative (-) side of the ignition coil
or tach signal connection point as indi-
cated in the
ELECTRICAL CONNEC-
TIONS
section of this manual.
Do not
allow this connection to touch ground!
4. The
WHITE
lead is for instrument panel lighting,
and need not be connected for this check.
5. When all connections are secure, start the
vehicles engine. Confirm the operation of
the tachometer throughout the operating
temperature range of the engine, and at
both curb idle, and higher engine speeds.
The tachometer should follow the speed of
the engine smoothly, and show no signs of
erratic operation.
Should you encounter unsatisfactory tachom-
eter operation (erratic, no reading, etc.) on
engines equipped with high performance and/
or aftermarket ignition systems or ignition coils,
you may have selected the incorrect tach
connection point for the tachometers
GREEN
lead, or a tachometer filter assembly may be
required.
Contact the manufacturer of the ignition
system or ignition coil for information
regarding tachometer connection to his
product and/or the availability of an
electrical filter assembly if required.
When you are satisfied with tachometer
performance, proceed to the permanent
installation instructions which follow.
FIGURE 1
LAMP
SOCKET
