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fULL Sweep eLeCTRIC pReSSURe gAUgeS
INSTALLATION INSTRUCTIONS
fULL Sweep eLeCTRIC
pReSSURe gAUgeS
�
2650-621B
12V BATTeRY
SENDER
GOOD ENGINE
GROUND
GROMMET
+ 12v CONNECTION
RED
BLACK
+ 12v DASH
LIGHTING
GOOD
ENGINE
GROUND
WHITE
BLACK
Use teflon sealing compound sparingly
where symbol indicates. (Tape not
recommended on these threads.)
CAUTION!
As a safety precaution, the
+12V terminal of this product
should be fused before
connecting to the 12V ignition
switch. We recommend using
a 1 Amp, 3AG fast-acting type
cartridge fuse (Littlefuse
�
#
312 001 or an equivalent).
Installation - Nitrous pressure
1. Check that you have all parts required for installation, and the
engine is cool.
2. Disconnect the negative (-) battery cable.
3. Gauge mounts in a 2
5 8

hole for 2
5 8

gauges, and a 2
1 16

hole
for 2
1 16

gauges. Use supplied brackets and nuts to secure
gauge to dash.
4. Drill 1 diameter hole where wires pass through sheet metal (such
as firewall) and install rubber grommet provided.
5. Connect the white wire to dash lighting or switchable 12v light
source, and connect the black wire to a good ground.
6.
Make sure the nitrous bottle valve is closed and there is no
pressure in the system.
7. Remove the main nitrous feed line from the bottle or the nitrous
solenoid. Install the in-line gauge adapter (e.g. NOS part #16770
or #16771) either on the nitrous bottle or nitrous solenoid. Re-
install the main nitrous feed line. Install pressure sender and
wiring harness. For mounting off bottle in rear of car, use 20
sender harness model 5223.
8. Open the nitrous bottle valve.
NOTe: Test all fittings and hoses for any leakage. If any leaks

are detected, determine the cause of the leak and

repair. Do not operate vehicle if any leaks are detected.
WIRING
HARNESS
FUSE
(SEE CAUTION LEFT)
In-Line
Gauge Adapter
Nitrous
Solenoid
IN
OUT
Main Nitrous Feed
Nitrous
Bottle
Use teflon sealing
compound where
symbol indicates.
(Tape not
recommended on
these threads.)
FIREWALL
Installation - fuel & Oil pressure
1. Check that you have all parts required for installation, and the
engine is cool.
2. Disconnect the negative (-) battery cable.
3. Gauge mounts in a 2
5 8
hole for 2
5 8
gauges, and a 2
1 16
hole
for 2
1 16
gauges. Use supplied brackets and nuts to secure
gauge to dash.
4. Drill 1 diameter hole where wires pass through sheet metal
(such as firewall) and install rubber grommet provided.
(Grommet will require slit.)
CAUTION:
If you will be working with the fuel system, take care to insure no sparks
or flames occur. Do not smoke while installing the fuel pressure sender.
wARNINg:
The fuel system is pressurized and often retains this pressure for an
extended period of time. Properly vent your fuel system before installing
the fuel pressure sender. If you are not familiar with the proper method
of venting, you MUST have this done by an experienced mechanic.
NOTe: When the ignition is off the pointer may not always

rest at zero.
wARNINg: Not compatible with Nitromethane, Methanol,

or 100% MTBE.
5. Connect the white wire to dash lighting or switchable 12v light source,
and the Black wire to a good ground.
6. [
for oil pressure gauge installation, an optional

1 4
NPT adapter is
included.
for fuel pressure gauge, install the
1 8

NPT pressure sender
into the fuel system (See warning in next column). For Ford fuel injected
applications with a Schrader valve in the fuel rail, use adapter 3280
between the fuel rail and pressure sender.]
If unit is to be installed on a high vibration application such as a full race
engine or engine capable of high RPM, it is strongly recommended that
the sender be remote mounted to either the fenderwell or firewall, to
insulate from vibration.
failure to remote-locate pressure senders
on such an application could result in gauge failure and potential
damage to vehicle and/or operator injury. Braided stainless steel lines
are sold separately by Auto Meter, and can be used to accomplish this.
7. Reconnect negative (-) battery cable.
NOTe: Test all fittings and hoses for any leakage. If any leaks are
detected, determine the cause of the leak and repair. Do not operate
vehicle if any leaks are detected.
OPTIONAL
SLIT TUBING
RECOMMENDED
(AVAILABLE AT MOST
HARDWARE STORES) power-Up
The pointer will move backward to the stop pin and then move to the zero box. This procedure is an auto-calibration
function and is performed on every power-up. While this test is being performed, the gauge may make a clicking
sound. This is normal.
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 Meters 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.

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.
FOR SERVICE SEND TO:
AUTO MeTeR pRODUCTS, INC.

413 W. Elm St., Sycamore, IL 60178 USA (815) 899-0801
Email us at service@autometer.com
2650-621B 6/10/04
Installation - Brake pressure
Brake Line
Brake Fitting
Teflon Sealing compound
Pressure Sensor
1 8

NPT Thread on Sensor
This gauge is equipped to output the sensor signal to an Auto Meter Data Logger.
This feature allows you to use the same sensor for both the gauge and the data
logger. With this gauge it is no longer necessary to install two sensors to measure
the same function.
To use this feature, you must have an Auto Meter Data Logger installed in the vehicle
and purchase a cable kit (Model #9420) to connect the gauge to the Data Logger.
Pins number 4 & 10 (see illustration to right) in the connector on the back of the
gauge are the sensor signal and ground that must be connected to the data logger.
After connecting the gauge to the data logger, the data logger must be calibrated to
the sensor.
Instructions for wiring and calibration are included with the cable kit.
5 4 3 2 1
10 9 8 7 6
Ground Neg.(-)
Sensor Signal (+)
Data Logger Output
(Back of Gauge)
� 2004 Auto Meter Products, Inc.
1. Check that you have all parts required for installation, and the
engine is cool.
2. Disconnect the negative (-) battery cable.
3. Gauge mounts in a 2
5 8

hole for 2
5 8

gauges, and a 2
1 16

hole
for 2
1 16

gauges. Use supplied brackets and nuts to secure
gauge to dash.
4. Drill 1 diameter hole where wires pass through sheet metal
(such as firewall) and install rubber grommet provided.
5. Connect the white wire to dash lighting or switchable 12v light
source, and connect the black wire to a good ground.
6. If you are not familar with proper brake system bleeding
procedures, do not install this gauge. Have a qualified
mechanic do it for you.
7. Locate a
1 8 -27 NPT port in your brake system in a location
where you would like to measure brake pressure. If no port is
available, you will need to install a tee fitting in the brake line
you want to measure.
Only use fittings that are approved for
use in brake systems.
8. Install the pressure sensor in the
1 8 -27 NPT port using a
Teflon thread sealing compound.
9. Bleed the brake system using standard brake bleeding
procedures.

Again, if you are not familiar with proper brake system
bleeding procedures, do not install this gauge. Have a
qualified mechanic do it for you.

Note: Install sensor with electrical connector


facing down to allow any air in the sensor


to escape during bleeding.