Auto Meter 2688 User Manual
General information, 5" electric speedometer, Mounting
(Speedometers are pre-calibrated for 16 pulse/revolution sender.
Speedometers that include a 2 wire sender are pre-calibrated to 8 pulse/
revolution to match sender. See Speedo Senders below for available
Auto Meter Senders.) The speedometer should be calibrated to ensure
accurate operation after installation.
General Information
INSTALLATION INSTRUCTIONS
3
3
/
8
" & 5" ELECTRIC SPEEDOMETER
2650-1164-00 Rev. B
This electric speedometer utilizes a LCD to display odometer and
trip odometer mileage. Momentarily pressing of the Trip/Reset button
on the dial window toggles the odometer/trip odometer information
displayed on the LCD. Pressing the button, while in trip mode, for more
than two seconds will reset the trip odometer. The odometer cannot be
reset.
The speedometer is designed to operate with an electrical speed
sender. The speed senders signal pulse range must be between
500 and 400,000 pulses/mile. Any speed sender or electronic
module that meets the following two conditions can be used:
• Pulse range generated proportional to the vehicle speed
• Output within the voltage ranges listed below:
2.0 to 16V peak (Square Wave), 3 wire
2.0 to 120V peak to peak (Sine Wave), 2 wire
WARNING
Incorrect hookup will damage the speedometer and
void warranty. Please read these instructions carefully.
Mounting
1. Mount a 3
3
⁄
8
" speedometer in a 3
3
⁄
8
" dia. hole and a 5" speedometer
in a 4
5
⁄
8
" dia. hole in the dashboard. (be careful not to make
the hole too large.)
2. Cut a
3
⁄
8
" dia. hole in the firewall for the speedometer wires. Place
a rubber grommet in the hole and route the connector wires
through the grommet to the engine compartment.
3. Connect the speedometer wires as shown in the wiring section.
4. Secure the speedometer to the dashboard using the provided
bracket, and hardware.
.
Note: With the ignition switch off, the speedometer pointer may not
always rest at zero. This is normal. When engine is started, the pointer
will first move to half scale then will rest at zero.
5" Models
4
15
⁄
16
"
3
3
⁄
4
"
1
3
⁄
4
"
3
11
⁄
32
"
2
3
⁄
8
"
4
19
⁄
32
"
Speedometer Senders
NOTE: The odometer on this speedometer will read from 1 to
5 miles. This is done during factory testing to insure
optimum quality.
NOTE: All Auto Meter programmable speedometers are also
compatible with the 5289 GPS module.
Recommended Auto Meter Hall-Effect (Square Wave), 3 wire, 16 Pulses
Per Revolution senders:
5291 Standard 7/8-18 thread
5292 Ford, plug in
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.
Once the speedometer is mounted and wired into the vehicle, the speedometer should be tested to verify the electrical connections are working properly. First,
watch the speedometer’s pointer as the power is applied. The pointer should first move to a midrange position, then down to the zero box on the dial. This action
verifies that power is properly connected to the speedometer. The vehicle should be driven some distance to verify the Vehicles Speed Sender (VSS) is connected
properly, and that the pointer moves. If the pointer does not move off the zero box, verify the VSS is connected properly.
3
3
⁄
8
"
Models
QUESTIONS:
If after completely reading these instructions you have questions regarding the operation or installation of your instrument(s),
please contact Auto Meter Technical Service at
866-248-6357.
You may also email us at
Additional information can also be found at
http://www.autometer.com/tech_faq.aspx