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As a safety precaution, the power wire to this product should be fused before
connecting it to the positive (+) side of the 12 VDC battery. We recommend using a
1 Amp fuse.
EQUUS Hall-Effect senders (Square Wave)
E9874
- Models
(standard 7/8-18 thread) &
(Ford Plug in Sensor), 3 wire sender, cruise.
GROMMET
3-Wire Sender
12V
IGNITION
SWITCH
Most OEM style or Factory Installed,
2 wire senders (Sine Wave)
IMPORTANT
When using most OEM/factory installed
(2 wire) senders, you must calibrate the
speedometer before it will function properly.
Use 20 AWG stranded or
heavier wire for hook-up
HI
GROMMET
LO
Sine
Wave
2 Wire
Sender
(Electric Speedometer calibration made easy!)
To calibrate your electric speedometer:
With the power off, push and hold the Trip/Reset button. While holding the button, start the vehicle and continue to hold the button until the pointer sweeps to
full scale and stays at full scale. You may now release the button.
Drive to the beginning of a pre-marked 2 mile (2 kilometer) distance and stop. It does not matter how far away it is to get to this pre-marked 2 mile (2 kilometer)
mile distance . DO NOT SHUT THE ENGINE OFF. Push and release the Trip/Reset button. The pointer will drop to half scale.
Drive the 2 mile (2 kilometer) distance. The pointer will remain at the half scale position no matter what speed you drive. It will be normal to see the LCD
odometer counting rapidly as it is receiving a speed signal. If you have to stop during the calibration, that is o.k. The speedometer will simply stop counting pulses
during this time.
At the end of the 2 mile (2 kilometer) distance, stop and press and release the Trip/Reset button. The pointer will drop to 0 and the calibration is stored.
You are now finished.
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CAUTION!
E9875
WHITE OR CLEAR
RED
BLACK
GND
Remove cap for cruise
control cab le, otherwise
leave cap installed.
FUSE
(SEE CAUTION )
Use 20 AWG stranded or
heavier wire for hook-up
(OR)
OR
IF NO
COMPUTER
Sine
Wave
GND
2 Wire
Sender
V.S. S.
Green
Red
IF
COMPUTER
CONTROLLED ,
TAP ONTO
HI-SIDE V.S. S.
SIGNAL
HI
LO
PCM,
ECM,
COMPUTER
Back of
speedometer
12 Volt Dash Lighting
White
Black
GND
Good Engine Ground
NOTE: The speedometer signal output wire (VSS)
produces a +5 volt DC Square wave signal.
This signal may be able to be used as a VSS
signal with some OEM and aftermarket ECM'
and cruise control units.
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