| Installation
and Operating Instructions
USE ON NEGATIVE EARTH VEHICLES ONLY
The SMITHS Motorsport Classic
tachometer is available in 80mm and 100mm diameter
case sizes.
INSTALLATION:
To fit the tacho, either an 80mm or 100mm clearance
hole is required, dependant on the model
purchased.
A harness is provided with 5 free end wires to
connect to your vehicle as below:
- GREEN - Connect to switched positive supply
- BLACK - Connect to ground.
- RED / WHITE - Connect to dash lamp
power.
RPM Signal input alternatives:-
- WHITE / BLACK - Connect to connect
breaker
side of ignition coil OR,
- RED / BLUE Connect to Ecu, Electronic
tacho signal.
The toggle switch is used to set the
calibration of the instrument, i.e. the number of
cylinders. The switch can then be removed from the
vehicle, if required, by separating the three
blade connectors. The switch will not be needed
again unless you require to re-install the product
on another engine with a different number of
cylinders. Push the toggle switch towards the
locating tag and slot on the switch washer for
"set adjust" and away from the tag for
"menu select".
OPERATING INSTRUCTIONS:
- Set the number of engine cylinders.
(For conventional ignition systems, 1 coil
and 1 distributor)
With the ignition switched off, press and
hold the toggle switch away from the tag, i.e.
menu select. Keeping the switch pressed, switch on the ignition.
With release of the button the pointer will move
to the factory setting of 4 cylinders. Each
press and release of the menu / select
toggle will increment the pointer by 1000RPM (or 1
cylinder), up to 12 cylinders.
When the
number of cylinders exceed full scale then the
pointer will move backwards with each minor
chaplet representing a 1 cylinder increment.
If 12 cylinders are exceeded, then the
sequence will restart at 1 cylinder
(1000rpm).
For 4 cylinder lost spark ignition
systems:-
These systems have two double ended coils
and no distributor.
Connect the white and
black lead of the tacho to one coil only. The
setting will need to be halved, therefore set
at 2000(2) not 4000(4), in this case.
Once the correct number of cylinders has been
set, flick the toggle switch to Set Adjust to
store the setting.
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