nd Warning Indicators sections for details on locating Tachometer
and indicator wires for most motorcycle applications
**The Check Engine indicator will not function using these gauges on 2004+ HD models due to the signal being fed through the data bus,
however the HD diagnostic tool can still check and clear codes through the diagnostic connector. 2004+HD Indicator wires match the
above chart, but please read VSS and Tachometer sections for proper wiring.

GAUGE SETUP AND CALIBRATION
The setup menus are entered by holding the switch in while turning the key on. The menus are as follows:
Main Menu
Sub Menu
Description
TACH
ENGINE
set engine cylinder setting


WARN
set rpm shift warning point


UPDATE
set rpm update rate for digital readout


SIGNAL
select normal or low voltage tach signal




NORMAL




LO VLT
INFO
MODEL
Gauge
model
number
VER
Gauge
revision
code
PPM
speed
cal
setting
GEAR
transmission
gear
display
selection
OFF

PROGRM
DONE


restart system with new settings



MAN#650087A

MAN#650087A
POWER
Connect the red wire from the main harness to accessory power from the ignition switch.
Never connect this to a battery charger alone. It needs to have a 12 volt battery connected to it. Battery chargers have an
unregulated voltage output that will cause the system to not operate properly.
GROUND
The black wire is the main ground for display system. A poor ground connection can cause improper or erratic operation.
STATUS AND WARNING INDICATORS

The right turn, left turn, and high beam indicators are activated by 12 volts at their respective hook-up wires. The right turn
signal wire is green, the left turn signal wire is orange, and the high beam wire is purple. These can be connected to the same wires
that the indicator lights would be connected to. The display system wire colors may not match the wire colors in your electrical wire
harness, consult a service manual to determine the color code and location of any wires you cannot locate.

The neutral, low oil, and check engine indicators are activated by ground at their respective hook-up wires. The check
engine wire is pink, the low oil wire is brown, and the neutral wire is white/green.
LOW VOLTAGE WARNING
When the voltage drops below 11 volts with the engine running, LO VLT will be displayed.
SECURITY SYSTEM INDICATOR

The security system indicator is a red light that is activated by 12 volts to the white/black wire. It will light up whether the
gauge is powered or not.
SHIFT LIGHT OUTPUT

The shift light output is a ground switch that turns on whenever the rpm exceeds the warning point. It can handle 0.25A,
equivalent to a 3W 12V bulb. Connect a low current indicator as follows: One wire from the light will connect to 12 volts, the other
wire will connect to the white/purple wire from the gauge.
If a large or high power light will be used, then a relay should be connected as follows: One of the coil wires should be
connected to 12 volts and the other coil wire will connect to the white/purple wire from the gauge. The relay contacts will be used to
switch power to the light. Any 12volt automotive relay can be used, such as Dakota Digitals RLY-1 30A relay.
TACHOMETER
The tachometer is used by connecting the yellow wire from the main harness to the negative side of the coil or to an
ignition module tach output. The tachometer is adjustable for 1 15 cylinder settings. The 1 cylinder setting is used for single-fire
ignition systems without a buffered tach output.
For tach signals integrated into a vehicle wiring harness, consult a service manual to determine the color code and
location of the tachometer signal. The bar displays rpm x1000. The starting bar range is 250 6500. If the rpm exceeds 6500 the
bar will automatically switch to a 500 13,000 bar readout and will remain there until the rpm drops below 2000.
For 2004+ Harley and 2003 V-Rod
The tachometer signal will come from the negative side of the ignition coil. Blue/Orange for the front cylinder, Yellow/Blue
for the rear cylinder, connect the tachometer input to only one of these two wires, set the tachometer for a 1 cyl signal, see
Tachometer Set-up for instructions.
TACHOMETER SETUP
The gauge can be set to read from 1-15 cylinder ignition signals. It can also be set to read either 12 volt tach signals or 5
volt tach signals found on some engine computers. The digital tachometer update rate can be adjusted between slow, mid, and fast.
The rpm warning/shift point can be adjusted from 2200 14800. The tachometer will read from 350 17,500 rpm. The bar tach
automatically switches between 6500 full scale and 13,000 full scale depending on the rpm.
Press and hold the switch while turning the key on. Release the switch. When TACH is displayed, press the switch again
and then release it. The message display should switch between ENGINE, WARN, UPDATE and SIGNAL.

Engine cylinder setup
When ENGINE is displayed press and release the switch.
The current cylinder setting will be displayed.
Press and release the switch until the desired setting is displayed.
Press and hold the switch until DONE is displayed.
Rpm warning setup
When WARN is displayed press and release the switch.
The current warning point will be displayed.
Press and release the switch until the desired setting is displayed.
Press and hold the switch until DONE is displayed.
Display update setup
When UPDATE is displayed press and release the switch.
The update setting will be displayed. (1=slow, 2=mid, 3=fast)
Press and release the switch until the desired setting is displayed.
Press and hold the switch until DONE is displayed.
Tach signal setup
When SIGNAL is displayed press and release the switch.
The setting will be displayed. (NORMAL or LO VOLT)
Press and release the switch until the desired setting is displayed.
Press and hold the switch until DONE is displayed.


MAN#650087A
GEAR INDICATOR SETUP
This gauge can optionally display the gear position only when used in conjunction with an HLY-3011. The gauge can learn
the positions based on speed and rpm. It will work with 3, 4, 5, or 6 speed transmissions. The speed signal must be fed
from an HLY-3011 speedometer output. Connect the white wire from the HLY-3011 to the gray wire on the HLY-3021.
To program the gear positions in, begin at a section of road where you can gradually shift through all of the gears. Press
and hold the switch while turning the key on and starting the engine. Once the engine is running, release the switch.
When GEAR is displayed, press the switch again and then release it.
The display will show the current selection, OFF or PROGRM. Press and release the switch to change the selection.
When PROGRM is displayed, press and hold the switch to begin the gear programming. The message will show LO
RPM if the engine rpm is below 1500, or LO SPD if the vehicle speed is below 5.
Begin driving in 1
st
gear. The display should show GEAR 1 and the 1 should be flashing. Drive at a steady speed then
press and release the switch. The 1 should stop flashing for a few seconds and then switch to a flashing 2.
Shift to 2
nd
gear and drive at a steady speed. Press and release the switch again.
Repeat this through each gear. When you are done, press and hold the switch until the display shows DONE.
Press and release the switch to restart the gauge in normal operation.

INFO MENU
The INFO menu is used to get the gauge model number, gauge revision code, and speed cal setting. This will normally
only be used for diagnostic and troubleshooting.

FUNCTION SWITCH

The function switch on the front of the speedometer allows access to all of the mileage, rpm, and performance information.
Pressing and releasing the function switch toggles through the different displays. The display sequence is as follows:
TACH MENU
HOURS
>
HR 0.0
re-settable hour meter
GEAR
>


current gear position (if programmed)
HI RPM
>
H 0000
high rpm recall
RPM
>
R 0000
rpm reading in alpha display
WARN
>
W 0000
current rpm warning or SHIFT if over set point
LO OIL
>


only visible if input is activated
LO VLT
>


only visible if warning is activated

NIGHT DIMMING

Your display system has a dimming feature that dims the display intensity. Normally the system is at full brightness for
daytime viewing. When the blue wire has 12 volts the display intensity will be reduced. Connect this to a toggle switch if you wish to
use this feature. To have the system at full brightness all of the time, leave the blue wire disconnected.

WIRING COLOR CODE FOR GAUGE:
HLY-3021*


2003 and older HD
PIN # ON GAUGE

Stock harness color

Function
1- WHITE NOT
USED
NOT
USED
2- WHITE/PURPLE
normally not used

tach warning output
3-
BLACK BLACK
ground
for
gauge
4-
WHITE/GREEN TAN**
neutral
indicator
5- PINK

BLACK/YELLOW**

engine indicator
6-
GREEN
BROWN
**
right
turn
indicator



7-
ORANGE
VIOLET** left
turn
indicator
8- YELLOW

PINK**


tach signal input
9- GRAY


HLY-3011 VSS output

VSS for gear position
10- WHITE/RED
NOT
USED
NOT
USED


11- RED

`
ORANGE/WHITE

+12 volt power with key on
12- BROWN

GREEN/YELLOW**

low oil warning indicator
13-
BLUE normally
not
used
night
dimming
14- PURPLE


WHITE**


high beam indicator


15- WHITE/BLUE

normally not used

optional external switch input
16-