Snowmobile Arctic Cat (2000 year). Manual

Wire Color Code and

Function Description

NOTE: The following wire color code and function

description will assist in using the Main Harness
and Hood Harness wiring diagrams (see Section 6).
Note that some colors are numbered. When a
numbered color appears on either of the wiring
diagrams, refer to this color code description page,
and it will provide you with additional information.

COLOR

FUNCTION — DESCRIPTION

Brown

Electrical Common;
Chassis Ground

The brown wire is connected to the chassis at the
engine stator plate and also through the voltage
regulator chassis bolt (prior to 1989, the taillight
harness also had a chassis connection). The
headlight bracket is grounded on some models to
reduce the bracket RFI emissions. All brown wires
are common ground.

Yellow

AC Power; 13 Volts AC
(Alternating Current)

The yellow wire is connected to the engine stator
plate lighting coil and the voltage regulator. The
voltage produced by the lighting coil is very engine
RPM dependent. The voltage regulator is
necessary to maintain 13.5 VAC on the yellow wire
whenever the engine exceeds about 3000 RPM. All
yellow wires are 13 VAC. The signal on the yellow
wire is AC. Not only is the voltage level of this signal
RPM dependent, but the signal frequency (cycles
per second) is RPM dependent as well. The electric
tachometer uses this changing frequency
phenomenon to indicate the engine RPM. An
electric tachometer will operate properly when
connected to any yellow (13 VAC) and brown
(common ground) wire pair.

White

Headlight Low Beam

The white wire connects the dimmer switch to the
headlight bulb. The low beam filament will illuminate
when the dimmer switch connects the white wire to
13 VAC power.

Blue

Headlight High Beam
and Indicator Light

The blue wire connects the dimmer switch to the
headlight bulb. The high beam will illuminate when
the dimmer switch connects the blue wire to 13 VAC
power. Some models use a tachometer with a high
beam indicator light. The high beam indicator light
will also illuminate when the dimmer switch
connects the blue wire to 13 VAC power.

Green

Handlebar Warmer Indicator Light

Some models use a tachometer with a handlebar
warmer indicator light. The green wire connects the
handlebar warmer switch to the “warmer” indicator
light. The “warmer” light will illuminate when the
handlebar warmer switch connects the green wire
to common ground.

COLOR

FUNCTION — DESCRIPTION

Violet or
Black (NOI)

Ignition System “Shut-Off”

The violet or black wire connects the ignition system
CDI module to the throttle control switches. Ignition
spark is interrupted when any of the switches close,
connecting the violet or black wire to a common
ground.

Black/Red

Ignition System “Shut-Off”

The black/red wire connects the throttle control
switches to the ignition switch. “Spark” occurs when
the black/red is at a common ground level and
“spark” stops when the black/red wire is open (not
connected to common ground).

Red/White
#1

High Temperature Warning Light

Some models use a speedometer with a high
temperature warning light. The red/white #1 wire
connects the high temperature sensor to the
temperature warning light. The “temp” light will
illuminate when the sensor connects the red/white
#1 wire to common ground.

Red/White
#2

Solenoid Coil Power

The red/white #2 wire connects the ignition switch
(12 volt DC) power to the solenoid. The solenoid will
activate when the ignition switch connects the
red/white #2 wire to the + 12 VDC battery power.

Red #1

Brakelight

The red #1 wire connects the brake control
assembly switch to the brakelight filament. The
brakelight will illuminate when the brake switch
connects the red #1 wire to 13 VAC power.

Red #2

Electric Start Battery Power;
12 Volts DC (Direct Current)

The red #2 wire connects the battery positive post
(+12 VDC) to the ignition switch through the fuse
holder. All electric start red #2 wires are +12 VDC.
If the fuse “blows,” all

red #2 wires are

disconnected from the battery and battery charging
(via the charging diode) discontinues until the fuse
is replaced.

Red #3

Low Oil Warning Light

The red #3 wire connects the low oil sensor to the
“oil” warning light. The “oil” light will illuminate when
the sensor connects the red #3 wire to 13 VAC
power.

Gray

Electric Fuel Level Gauge

Some models are equipped with an electric fuel
level gauge. The gray wire connects the in-tank
resistive sensor to the gauge. As the fuel level rises,
the sensor resistance decreases, and the gauge
needle rises; conversely, as the fuel level goes
down, the sensor resistance increases, and the
gauge needle drops.

Orange

Reverse Alarm

Some models are equipped with a reverse gear and
reverse alarm. The orange wire connects the
reverse switch to the reverse alarm. The reverse
alarm will “beep” when the switch connects the
orange wire to 13 VAC power.

5-51

Ignition Timing

CHECKING

1. Connect a timing light to the MAG-side spark plug

lead.

2. Using a shielded safety stand, raise the rear of the

snowmobile off the floor and start the engine.
Gradually increase the engine speed to the specified
RPM; the pointer should align with the proper
timing mark on the flywheel.

3. If timing is not correct, adjust the ignition timing.

ADJUSTING

1. Remove the recoil starter, starter pulley, and

flywheel.

2. Loosen the two screws securing the stator plate and

rotate the stator plate in the proper direction to
attain correct timing.

NOTE: Rotate the stator plate clockwise to retard

the timing or counterclockwise to advance the
timing. The stamped marks on the stator plate at the
upper socket-head cap screw mounting hole can be
used for timing.

3. Tighten the screws securing the stator plate.

4. Install the flywheel, starter pulley, and recoil starter.

5. Affirm timing for accuracy and adjust if necessary.

5-52

Snowmobile Arctic Cat (2000 year). Manual - part 76