Harbor Freight Tools 38391 User Manual
12 VOLT JUMP-START
AND POWER SUPPLY
38391
SET UP AND OPERATING INSTRUCTIONS
Note: After purchase
and before initial use
of the Jump-Start,
fully charge the JumpStart battery until the
DC Charging LED
turns off.
After each jump start,
fully recharge the
battery until the DC
Charging LED turns
off.
Fully charge JumpStart battery every 30
days to ensure long
battery life.
Visit our website at: http://www.harborfreight.com
Read this material before using this product.
Failure to do so can result in serious injury.
SAVE THIS MANUAL.
Copyright© 2009 by Harbor Freight Tools®. All rights reserved. No portion of this manual 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 manual may not be drawn proportionally. Due to continuing
improvements, actual product may differ slightly from the product described herein. Tools required for
assembly and service may not be included.
For technical questions or replacement parts, please call 1-800-444-3353.
SPECIFICATIONS
Start Amps 400
Peak Amps 900
Battery 12 V, 17 Ah, Lead-Acid,
Rechargeable
Charging Current = 0.18A
Booster Cables #4 Gauge, 17” Length
Includes: 12 Volt Cigarette Lighter Charger,
AC Adapter Receptacle, Built-in Light,
Booster Cable Storage, Charge/Battery Indicators
Note: Charging performance of this tool
(if charged by line voltage) may vary
depending on variations in local line
voltage. Extension cord usage may
also affect charging performance.
Save This Manual
You will need the manual for
the safety warnings and precautions,
assembly instructions, operating and
maintenance procedures, parts list and
diagram. Keep your invoice with this
manual. Write the invoice number on the
inside of the front cover. Keep the manual
and invoice in a safe and dry place for
future reference.
SAFETY WARNINGS AND
PRECAUTIONS
lighted. Do not use in the presence
of ammable gases or liquids.
Keep children away3. . Children must
never be allowed in the work area.
Do not let them handle this product.
Store idle equipment4. . When not
in use, tools must be stored in a dry
location to inhibit rust. Always lock
up tools and keep out of reach of
children.
Use the right tool for the job5. . Do
not attempt to force a small tool or
attachment to do the work of a larger
industrial tool. There are certain
applications for which this tool was
designed. It will do the job better and
more safely at the rate for which it
was intended. Do not modify this tool
and do not use this tool for a purpose
for which it was not intended.
Dress properly6. . Do not wear
loose clothing or jewelry as they
can be caught in moving parts.
Protective, electrically non-conductive
clothes and non-skid footwear are
recommended when working. Wear
restrictive hair covering to contain
long hair.
WARNING: When using tool, basic safety
precautions should always be followed
to reduce the risk of personal injury and
damage to equipment.
Read all instructions before using this
tool!
Keep work area clean1. . Cluttered
areas invite injuries.
Observe work area conditions2. .
Do not use machines or power tools
in damp or wet locations. Don’t
expose to rain. Keep work area well
Wear ANSI-approved splash-7.
resistant safety goggles.
Do not overreach8. . Keep proper
footing and balance at all times.
Maintain tools with care9. . Keep
tools clean for better and safer
performance. Follow instructions for
lubricating and changing accessories.
Inspect tool cords periodically and, if
damaged, have them repaired by an
authorized technician. The handles
must be kept clean, dry, and free from
oil and grease at all times.
Page 2For technical questions, please call 1-800-444-3353.SKU 38391
Stay alert10. . Watch what you are
doing, use common sense. Do not
operate any tool when you are tired.
Check for damaged parts11. . Before
using any tool, any part that appears
damaged should be carefully checked
to determine that it will operate
properly and perform its intended
function. Check for alignment and
binding of moving parts; any broken
parts or mounting xtures; and any
other condition that may affect proper
operation. Any part that is damaged
should be properly repaired or
replaced by a qualied technician. Do
not use the tool if any switch does not
turn On and Off properly.
Replacement parts and 12.
accessories. When servicing, use
only identical replacement parts.
Use of any other parts will void the
warranty. Only use accessories
intended for use with this tool.
Do not operate tool if under the 13.
inuence of alcohol or drugs. Read
warning labels if taking prescription
medicine to determine if your
judgement or reexes are impaired
while taking drugs. If there is any
doubt, do not operate the Jump-Start.
Maintenance14. . For your safety,
maintenance should be performed
regularly by a qualied technician.
If you come in contact with battery 15.
acid, immediately wash the effected
area with cool, clean water. Call for
medical assistance and continue
ushing the effected areas until
medical help arrives.
clamps only. Keep it in the “Off”
position except when jumpstarting.
Lead-acid batteries vent hydrogen 17.
gas during normal operation and
charging. Hydrogen is highly
ammable and explosive. Charge
batteries only in a well-ventilated
area.
Do not allow the red and black 18.
clamps to come in contact with each
other or the same metal object.
When charging, 19. rst connect the red
(+) clamp to the positive (+) battery
terminal.
Connect the 20. negative (-) clamp to
a non-moving metal engine part for
negative ground systems.
Only use the charger on 12 V 21.
systems on vehicles or boats.
Do not use as a replacement for a 22.
vehicle battery.
The warnings, cautions, and 23.
instructions discussed in this
instruction manual cannot cover all
possible conditions and situations
that may occur. It must be understood
by the operator that common sense
and caution are factors which cannot
be built into this product, but must be
supplied by the operator.
People with pacemakers should 24.
consult their physician(s) before
use. Electromagnetic elds in close
proximity to heart pacemaker could
cause pacemaker interference or
pacemaker failure.
The ON/Off switch (See FIGURE 1, 16.
next page) regulates power to the
Page 3For technical questions, please call 1-800-444-3353.SKU 38391
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