Auto Meter 3674 - Manual

INSTALLATION INSTRUCTIONS
fULL Sweep eLeCTRIC pReSSURe gAUgeS
2650-1134-00 Rev. B
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, the red wire to switched +12V source and the black wire
to ground. (see diagram for details)
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.)
5. Connect the white wire to dash lighting or switchable 12v light source,
the red wire to switched +12V source and the black wire to ground.
(see diagram for details)
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.
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 caution below). 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.
8. Reconnect negative (-) battery cable.
OPTIONAL
SLIT TUBING
RECOMMENDED
(AVAILABLE AT MOST
HARDWARE STORES)
Check with
your nitrous kit
manufacturer
for availability
of this adapter.
(for standard incandescent
lit instrument)
FOR INTERNAL LED
LIT INSTRUMENTS
WHITE
+12v DASH
LIGHTING
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.
ATTeNTION DODge DIeSeL OwNeRS: If using on ‘98-’02 (some
‘03) Cummins diesels, you MUST use #3227 Line Kit and #3279
restrictor to prevent premature failure of sender. Failure to do so will
void warranty.