Auto Meter 3890 User Manual

INSTALLATION INSTRUCTIONS

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Mini Monster Tach Operation

TM

2650-1166

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 [e-mail].

Additional information can also be found at http://www.autometer.com/tech_faq.aspx

Configuration

The tachometer is configured at the factory for 4 PPR. (8 CYL)

To change the PPR, follow the steps below:

1. With no power applied to the tach, press and hold the
RIGHT “-” button.

2. While holding the “-” button, apply power to the tach by
turning the ignition switch to the “Accessory” or “On” position.

Do not start the engine! Release the RIGHT “-” button. The

pointer will move to a position on

the dial which indicates the default configuration of 4 PPR.

3. Press and release the LEFT “+” button to change the PPR
setting. This will cause the pointer

to indicate 5 PPR, then 6 PPR, then down to 0.5 PPR, then

1, 1.5, 2, 2.5, 3, and back to 4 PPR.

See the table below to find the pointer reading that

corresponds to the desired PPR.

QUESTIONS:

ENGINE Most Most Most Most

2 cyl. 4 cyl. 6 cyl. 8 cyl.

PPR 0.5 1 1.5 2 2.5 3 4 5 6

DIAL RPM 500 1000 1500 2000 2500 3000 4000 5000 6000

4. When the pointer indicates the desired PPR, press and release the RIGHT “-” button to
permanently store the settings and exit Configuration mode.

Mounting

1) Loosen both bolts holding the shock strap to the mounting
foot. Back both bolts (5⁄32” allen wrench) out until each is only
one or two turns into the spacer.

2) Pass tach wires through shock strap assembly and slide tach
casing into shock strap assembly.

3) Position Shift-Lite mounting bracket under shock strap as
shown in image. Adjust Shift-Lite, tach, and mounting base to
desired positions (see figure 4 for recommended shock strap
position), and tighten bolts (5⁄32” allen wrench) holding mounting
foot to shock strap to secure the assembly.

4) Make sure rubber section of shock strap seats properly to
ensure proper fitment. Check to make sure shock strap is
approximately 3⁄4” (0.750”) between center line of strap and
step of tachometer casing for best mounting. Plug shift light
into tachometer connector. Plug is directional, do not force fit!

5) Recommended placement of external Shift-Lite is at 10
o’clock position. It is possible to place Shift-Lite in other
positions in accordance with driver preference and vehicle
mounting requirements.

6) The special design of the tachometer base allows for a variety
of mounting possibilities. Attach the base using screws
provided or use a pop rivet tool.

3

⁄4”

Note: Installation images shown may be different from your actual model.

1)

4)

2)

5)

3)

6)

Operation

1 Shift-Lite Set Mode

1.1 To enter this mode, apply power to the tach by turning the ignition switch to the “Accessory” or “On” position. Do not start the engine!
Press and release both the LEFT “+” and RIGHT “-” buttons at the same time. The pointer will indicate the current Shift-Lite set point.

1.2 Using the RIGHT “-” and LEFT “+” buttons, move the pointer to the desired RPM for the new Shift-Lite Set Point. Pressing the LEFT
button will cause the pointer to move up (CW), pressing the RIGHT “-” button will cause the pointer to move down (CCW).

1.3 Press and release both the LEFT “+” and RIGHT “-” buttons at the same time to save the setting and exit Shift-Lite Set Mode.

WHITE

FUSE

RED

(SEE CAUTION BELOW)

BLACK

GREEN

• Shift-Lite connector must be plugged in prior to operation.

* See autometer.com/tech_installation.aspx for specific vehicle information.

CAUTION!

As a safety precaution the Red wire of this product should be fused before connecting it to the
positive (+) side of the 12V DC battery. We recommend using a 4 Amp, 3AG fast-acting type
cartridge fuse (Littlefuse® # 312 004 or an equivalent) inline with the Red wire of our product.

12V DASH LIGHTING

12V IGNITION SWITCH (+)

GROMMET IN

FIREWALL

BLACK

GREEN

EARLY MODEL IGNITION

OR

GOOD ENGINE GROUND

GREEN

*

TACH
TERMINAL

ELECTRONIC IGNITION

WARNING

Warranty will be void if connected
to coil when using an aftermarket
ignition box such as, but not limited
to pr odu cts f rom t h e f ol low ing
manufacturers: MSD, Crane, Jacobs,
Ma llory , Ho lle y, E tc. . P ri or to
installation of your tachometer, check
with the ignition box manufacturer
for recommended tachometer signal
location.

SERVICE

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 this product 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 [phone]

© 2006 Auto Meter Products, Inc.

For Email: [e-mail]

2650-1166 7/10/06