Harbor Freight Tools 98475 User Manual
OIL PRESSURE
98475
GAUGE
INSTRUCTIONS AND PRECAUTIONS
Distributed exclusively by Harbor Freight Tools®.
3491 Mission Oaks Blvd., Camarillo, CA 93011
Visit our website at: http://www.harborfreight.com
SAVE THESE INSTRUCTIONS. READ ALL
PRECAUTIONS AND INSTRUCTIONS.
Copyright© 2008 by Harbor Freight Tools®. All rights reserved. No portion of this document or any artwork contained
herein may be reproduced in any shape or form without the express written consent of Harbor Freight Tools.
Diagrams within this document may not be drawn proportionally. Due to continuing improvements, actual product
may differ slightly from the product described herein.
For technical questions or replacement parts, please call 1-800-444-3353.
UNPACKING
When unpacking, check to make sure that
the item is intact and undamaged. If any parts are
missing or broken, please call Harbor Freight Tools
at the number shown on the cover of this document
as soon as possible.
IMPORTANT SAFETY
INFORMATION
Assembly Precautions
Assemble only according to these instruc-1.
tions. Improper assembly can create haz-
ards.
Wear ANSI-approved safety goggles and 2.
heavy-duty work gloves during assembly.
Keep assembly area clean and well lit.3.
Keep bystanders out of the area during as-4.
sembly.
Do not assemble when tired or when under 5.
the inuence of drugs or medication.
This product is not a toy. Do not allow chil-1.
dren to play with it.
Use for intended purpose(s) only.2.
Inspect before use; do not use if loose or 3.
damaged.
Only use in accordance with State, local, 4.
Federal and D.O.T. laws and regulations.
Disconnect vehicle battery negative post 5.
before installation.
Positive and negative connections can not 6.
touch. If you are unsure of how to install this
product safely then have a qualied mechanic install the gauge for you.
Insulate connections to prevent re.7.
Maintain product labels and nameplates. 8.
These carry important safety information.
If unreadable or missing, contact Harbor
Freight Tools for a replacement.
Use Precautions
ASSEMBLY INSTRUCTIONS
Read the ENTIRE IMPORTANT
SAFETY INFORMATION section at the
beginning of this document including
all text under subheadings therein
before set up or use of this product.
Setup
A round 2-1/16” wide hole with at least 2-1/2” 1.
clearance behind is needed to install this
gauge.
At least 18 AWG stranded copper wire must 2.
be purchased for the installation of this
gauge.
Some vehicles with air bags or other systems 3.
may require precautions before disconnect-
ing the battery. Consult your vehicle’s service
manual.
Route and secure wires as needed to attach 4.
the Gauge and sender to the desired area;
avoid sharp edges and hot spots.
Installation
Disconnect negative (-) vehicle battery cable 1.
according to manufacturer’s instructions.
Reconnect when installation completed.
Wire Oil Pressure Gauge according to dia-2.
gram shown below in Figure 1.
Note: If Sensor is wired differently, do not install
this Gauge. Do not disconnect wires if sensor
is already connected to other wiring. Consult
a mechanic.
Green wires goes to oil pressure sensor unit. 3.
Connect oil pressure sensor unit via oil lter
block sandwich or other means of plumb-
ing. Use teon tape or sealant on threads to
prevent oil leakage.
Wiring:4.
RED• Wire: Connects to a switched 12V
power source that turns on and off with
vehicle’s ignition switch.
CAUTION: It is recommended that a inline fuse
(1Amp/3AG) be installed before connecting
to the 12V ignition system.
GREEN• Wire: Connects to oil pressure
sensor unit. WARNING! Do not touch this
wire to positive source.
ORANGE• and WHITE Wires: Connect to
the 12V dashboard lights or other switch.
BLACK• Wire: Connects to a clean, or with
good connection, engine ground (-).
Install the meter into the hole. Attach bracket 5.
onto the back of the meter and tighten.
Reconnect the battery according to the ve-6.
hicle service manual. Verify that there are no
short circuits before reconnecting.
Ensure that the pressure line wiring has 7.
no leaks and is not near any parts that will
get hot during operation. Check for loose
strands of wire and direct contact with
grounded components. Use a multimeter with
a continuity function to help verify that there
are no shorts to ground.
Start the vehicle and turn the dashboard 8.
lights on. LED should light up. Be ready to
disconnect battery if arcing or sparking occurs at the meter.
To change the color of the LED light, push 9.
the button on the face of the gauge.
Figure 1
Record Serial Number Here:
Note: If product has no serial number, record month and year of purchase instead.
Note: No replacement parts are available.
Ignition
Dashboard Light
Dashboard Light
SKU 98475 For technical questions, please call 1-800-444-3353. Page 2
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