Auto Meter 1798 - Manual

INSTALLATION INSTRUCTIONS
3
1
/
8
" eLeCTRIC TAChOmeTeR
2650-1183
Front mounting
1. Can be mounted in a 3 5 ⁄
32
” dia. hole in the
dashboard. (Take care that hole is not cut too large.)
Can also be mounted in a standard aftermarket
street rod panel.
2. Drill a 3 ⁄
8
” dia. hole in the firewall where the
tachometer wires will be routed. Place rubber
grommet in hole and route the connector wires
through to the engine compartment.
3. Connect the tachometer wires as shown below.
4. Secure the tachometer in the dashboard using the
bracket, thumbnuts and lockwashers provided.
2 1 ⁄
4
"
3.300"
1 2
SIG.
+12V
LAMP
GND
GND
LAMP
251
1-892
OUT
+12V
1 1 2 2 1 2
4 CYL. / 2 PULSe 6 CYL. / 3 PULSe 8 CYL. / 4 PULSe
DN DN DN UP UP UP
Calibration
ImPORTANT: This tachometer is factory calibrated
to operate on 8 cylinder engines. For 4
or 6 cylinder engines, it is necessary to
make the proper adjustments to adapt this
tachometer to your cylinder range.
Locate the switch hole on the back of the tachometer.
Use an unwound paper clip to move each of the two
switches to the proper cylinder selection according to
the diagram illustration on the right. Apply included label
over switch hole.
NOTe: This tachometer has an air core meter. With
power off, it is normal for the pointer to leave
zero. When power is applied, the pointer will
move to the correct position.
Figure A.
8 CYL. (4 pulse)- Both switches up.
6 CYL. (3 pulse)- Switch One down, Switch Two up.
4 CYL. (2 pulse)- Both switches down.
If you are unsure of your vehicle’s pulse(s) per revolution or specific
calibration requirements, contact Auto Meter Technical Service Dept. at
(815) 899-0801, or go to www.autometer.com/hp/techtips for information.
SWITCH HOLE
3
1
⁄
8
" SIZe ShOWN
Figure A.
3.145 " dia.
(3 9 ⁄
64
" ref.)
Unwound
Paper Clip
WARNING
Incorrect hookup will damage
tachometer and void warranty.
Please read these instructions.
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 815-899-0801.
You may also email us at [email protected].
Additional information can also be found at http://www.autometer.com/tech_faq.aspx