112
2
1 2
4 CYL. / 1 PULSE
4 CYL. / 2 PULSE 6 CYL. / 3 PULSE
DN DN
DN UP UP DN
1 2
8 CYL. / 4 PULSE
UP UP
INSTALLATION INSTRUCTIONS
1
2
SIG LAMP OUT
+12V
GND
GND
LAMP + 12V
IN-DASH ELECTRIC TACHOMETER
For Use on Early Model & Most Electronic Ignitions
2650-1165
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 service@autometer.com.
Additional information can also be found at http://www.autometer.com/tech_faq.aspx
Calibration
IMPORTANT: This tachometer is factory calibrated to
operate on 8 cyl inder engines. For 4 or 6
cylinder engines, it is necessary t o make
the pro per adjustments to adapt thi s
tachometer to your cy linder range.
Locate the access hol e on the back of the tachometer.
Move ea ch of the two switches to the proper cylinder
selection according to the diagram illustration on the
right. Use a sma ll screwdriver or an unwound paper
clip to change t he switch sett ings. Install plast ic cap/
plug (s upplied in ins tallation kit) into access h ole.
NOTE: This ta chometer has a n air cor e meter. With
power o ff, it is normal for the pointer to leave
zero. W hen power is applied, t he pointer wil l
move to the corr ect position.
Figure A.
8 CYL. (4 pulse)- Both switches up.
6 CYL. (3 pulse)- Switch One up, Switch Two down.
4 CYL. (2 pulse)- Switch One down, Switch Two up.
4 CYL. (1 pulse)- Both switches down.
QUESTIONS:
Figure A.
(Angle view through access hole)
Access switch
through
access hole.
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.
Lens Cleaning
To prevent scratching the lens when
cleaning, use a mild, soapy solution to
clean. Wipe lightly with a soft cloth.
Switch is not
visible from
this angle,
shown for
location only.
33⁄8" SIZE SHOWN
Note:
This tachometer operates on most early
model ignitions, factory electronic and high
performance electronic racing ignitions.
12V BA
TTER
Y
COIL
- OR -
+
_
SIG LAMP OUT
+12V
GND
GND
LAMP + 12V
Mounting
1. Mount the 33⁄8” tachometer in a 33⁄8” dia. hole in the dashboard.
(Be careful not to cut the hole too large.)
2. Cut a 3⁄8” dia. hole in the firewall for the tachometer wires. Place
a rubber grommet in the hole and route the connector wires
through the grommet to the engine compartment.
3. Connect the tachometer wires as shown in the Wiring Section.
4. Secure the tachometer to the dashboard using the provided
bracket and hardware.
WIRING
Fuse
3
3
⁄ 4"
12V IGNITION
SWITCH
33⁄8
" Models
3
1
⁄ 4"
11
3
⁄ 32"
GROMMET
IN FIREWALL
LIGHT WIRE
- DASH
LIGHTING
CIRCUIT OR
12 VOLT (+)
EARLY
ELECTRONIC IGNITION
MODEL
IGNITION
TACH
TERMINAL
WARNING
Warranty will be void if connected to
coil when using an aftermarket ignition
box such as, but not limited to products
from the following manufacturers: MSD,
Crane, Jacobs, Mallory, Holley, Etc.. Prior
to installation of your tachometer, check
with the ignition box manufacturer for
As a safety precaution, the +12 V terminal of this product should be fused
before connecting it to the 12V ignition switch. We recommend using a 4 Amp,
3 AG fast-acting type cartridge fuse (Littlefuse® #312 004 or an equivalent).
CAUTION!
recommended tachometer signal location.
For service send your product to Auto Meter in a well packed shipping carton. Please include a note explaining what the problem is along with your phone number. Please specify when you
need the product back. If you need it back immediately mark the outside of the box “RUSH REPAIR,” and Auto Meter will service product within two days after receiving it. ($10.00 charge will
be added to the cost of “RUSH REPAIR.”) If you are sending product back for Warranty adjustment, you must include a copy (or original) of your sales receipt from the place of purchase.
12 MONTH LIMITED WARRANTY
Auto Meter Products, Inc. warrants to the consumer that all Auto Meter High Performance products will be free from defects in material and workmanship for a period of twelve (12) months from date of the
original purchase. Products that fail within this 12 month warranty period will be repaired or replaced at Auto Meter’s option to the consumer, when it is determined by Auto Meter Products, Inc. that the product
failed due to defects in material or workmanship. This warranty is limited to the repair or replacement of parts in the Auto Meter instruments. In no event shall this warranty exceed the original purchase price of
the Auto Meter instruments nor shall Auto Meter Products, Inc. be responsible for special, incidental or consequential damages or costs incurred due to the failure of this product. Warranty claims to Auto Meter
must be transportation prepaid and accompanied with dated proof of purchase. This warranty applies only to the original purchaser of product and is non-transferable. All implied warranties shall be limited in
duration to the said 12 month warranty period. Breaking the instrument seal, improper use or installation, accident, water damage, abuse, unauthorized repairs or alterations voids this warranty. Auto Meter
Products, Inc. disclaims any liability for consequential damages due to breach of any written or implied warranty on all products manufactured by Auto Meter.
FOR SERVICE SEND TO: AUTO METER PRODUCTS, INC. 413 W. Elm St., Sycamore, IL 60178 USA (815) 899-0801
©2006 Auto Meter Products, Inc.
Email us at service@autometer.com
SERVICE
2650-1165 7/17/06
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