Auto Meter 2688 - Manual (Page 2)

Remove cap for cruise
control cable, otherwise
leave cap installed.
GND
FUSE
(SEE CAUTION)
3-Wire Sender
GROMMET
DASH
LIGHTING
POWER
SIG GND
+12V GND
Back of
speedometer
Engine Ground
LAMP OUT
+12V LAMP
12V
IGNITION
SWITCH
BLACK
RED
WHITE or CLEAR
Calibration
CAUTION!
As a safety precaution, the power wire to this product should
be fused before connecting it to the 12 VDC power source. We
recommend using a 3 Amp automotive fuse inline with the power
wire to our product.
To calibrate your electronic speedometer:
1) With the power off, push and hold the calibration button (trip/reset button
when equipped). 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.
2) Drive to the beginning of a pre-marked 2 mile distance and come to a
stop. It does not matter how far away it is to get to this pre-marked 2
mile distance. Do NOT shut the engine off. Push and release the button.
The pointer will drop to half scale.
3) Drive the 2 mile distance. The pointer will remain at the half scale mark
no matter what speed you drive. If the speedometer has a LCD display
odometer, it will be normal to see it counting rapidly as it is receiving a
speed signal. If you have to stop during the calibration, that is o.k.
The speedometer is simply counting pulses during this time.
4) At the end of the 2 mile distance, come to a complete stop and push and
release the button. The pointer will drop to 0 and the calibration is stored.
You are now finished with calibrating.
Remember the accuracy of your 2 mile distance will directly affect the ac-
curacy of your speedometer.
NOTE: The speedometer signal output terminal (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’s
and cruise control units.
Wiring
Wiring
w/ typical aftermarket 3-wire sender
w/ typical aftermarket 2-wire sender (and no computer)
Use 20 AWG stranded or
heavier wire for hook-up
Use 20 AWG stranded or
heavier wire for hook-up
NOTE: Never apply power to 2-wire speed sender
GND
FUSE
(SEE CAUTION)
DASH
LIGHTING
POWER
SIG GND
+12V GND
Back of
speedometer
Engine Ground
LAMP OUT
+12V LAMP
12V
IGNITION
SWITCH
BLACK
WHITE or TAN