Intellitronix M9001G LED Tachometer Installation Guide
- June 12, 2024
- Intellitronix
Table of Contents
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INSTALLATION GUIDE
LED Digital Bar Graph Memory Tachometer Part Number: M9001
- Always disconnect the battery before attempting any electrical work on your vehicle.*
WIRING INSTRUCTIONS
Note: Automotive circuit connectors are the preferred method of connecting wires. However, you may also solder if you wish.
TACHOMETER INSTRUCTIONS
Our Digital Tachometer requires a signal from your ignition system, from
either the negative terminal of your coil or a direct tach output lead from
the distributor or electronic control module.
In order to isolate the signal wire from electrical noise interference, we
recommend all tachometer wires be routed as far away from any other voltage or
signal carrying wires as possible, especially spark plug wires.
This tachometer is initially calibrated for use with 8 cylinder engines. If
you are using it with a 4 or 6 cylinder engine, you must recalibrate the tach
for your specific application by cutting the correct loop of wire coming from
the back of the gauge. Do NOT cut both wires and leave disconnected or the
tachometer will NOT function.
The default setting for the tachometer is for an 8-cylinder engine.
For 4 cylinder operation, cut the ORANGE wire loop.
For 6 cylinder operation, cut the BLUE wire loop.
Ground – Black Connect directly to the engine block.
Power – Red Connect to a switched +12V source, such as the ignition.
Dimmer – Purple Connect to the parking lights to dim the LEDs 50% when the
headlights are on.
However, do not connect to the headlight rheostat control wire; the dimming
feature will not work properly. If you don’t want your display to dim with the
headlights, connect the wire to an engine ground.
Tachometer (memory capable) – Green
If your vehicle has a separate ignition coil, connect the green wire to the
negative (-) side of the coil – the wire that goes to the points or electronic
ignition module.
If your vehicle has a GM HEI ignition, connect to the terminal marked ‘TACH’,
or, on some systems, a single white wire with a spade terminal.
If your vehicle has an after-market ignition – some systems will connect to
the TACH output terminal.
If your vehicle has a computer controlled ignition system, consult the service
manual for the wire color and location.
If your vehicle has a magneto system, connect the tach signal wire to the
negative side of the coil.
Do not connect the tach terminal to the positive (+ or high voltage) side of
the ignition coil.
Note: If doing an LS engine swap you will normally need to have the tachometer
set at 4-cylinders.
To ensure that the ignition system does not interfere with any other dashboard
functions, do not run the tachometer wire alongside any other sender or input
wires. Do not use solid core spark plug wires with this dashboard system.
Solid core ignition wires cause a large amount of electromagnetic and radio
frequency interference which can disrupt the system’s operation.
The default setting for the tachometer is for an 8-cylinder engine.
For 4-cylinder engines, cut the orange wire loop.
For 6-cylinder engines, cut the blue wire loop.
Do not cut both wires and leave disconnected or the tachometer will not
function.
HIGH RPM RECALL
This tachometer has the ability to recall the highest RPM that your vehicle
has obtained since it was last reset. Press the button on the lower right
corner of the gauge to display the recall value.
Press and hold for several seconds to clear memory and reset the recall to
“0”.