1.5 Amp Onboard
Battery Charger
93258
ASSEMBLY AND OPERATING INSTRUCTIONS
Because of continuing improvements, actual product may differ slightly from photo.
®
3491 Mission Oaks Blvd., Camarillo, CA 93011
Copyright© 2005 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.
For technical questions and replacement parts, please call 1-800-444-3353
Rev 07i
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Personal Safety
8. Stay alert. Watch what you are doing, and use common sense when operating a battery charger.
Do not use a battery charger while tired or under the influence of drugs, alcohol, or medication.
A moment of inattention while operating a battery charger may result in serious personal injury.
9. Dress properly. Do not wear loose clothing or jewelry. Contain long hair. Keep your hair, clothing,
and gloves away from moving parts. Loose clothes, jewelry, or long hair can be caught in moving
parts.
10. Do not overreach. Keep proper footing and balance at all times during installation. Proper foot-
ing and balance enables better control in unexpected situations.
11. Use safety equipment. Always wear eye protection. Always wear ANSI approved splash resistant
safety eye goggles and heavy work gloves when working on or around lead-acid batteries. Wear long
sleeve shirt, long pants and work shoes. Using personal safety devices reduce the risk for injury.
12. People with pacemakers should consult their physician(s) before use. Electromagnetic fields in
close proximity to heart pacemaker could cause pacemaker interference or pacemaker failure.
Battery Charger Use and Care
13. Use bolts and included clamps to secure and support the battery charger to a stable platform.
This battery charger is designed to be installed on the compartment wall, battery holder or other struc-
ture near the vehicle battery.
14. Do not force the battery charger. Use the correct battery charger for your application. The cor-
rect battery charger will do the job better and safer at the rate for which it is designed.
15. Do not use the battery charger if the automatic control does not turn it on or off. If you observe the
LED lights not reacting roughly as expected according to the chart on page 8, disconnect and remove
the Battery Charger from the vehicle.
16. Disconnect the Power Cord Plug (not included) from the power source and from the charger
before making any adjustments, changing accessories, storing the battery charger, or driving
the vehicle. Such preventive safety measures reduce the risk of accidents.
17. Keep battery charger maintained and clean. Properly maintained battery chargers are less likely
to fail and are easier to control. Do not use a damaged battery charger.Tag damaged battery chargers
“Do not use” until repaired.
18. Check for misalignment or binding of support brackets, breakage of parts, and any other condi-
tion that may affect the battery charger operation. If damaged, have the battery charger serviced
before using. Many accidents are caused by poorly maintained battery chargers.
19. Use only accessories that are recommended by the manufacturer for your model. Accessories
that may be suitable for one tool may become hazardous when used on another tool.
Specific Safety Rules
1. Maintain labels and nameplates on the Battery Charger.These carry important information.If unreadable
or missing, contact Harbor Freight Tools for a replacement.
2. Avoid contact with Battery Acid. If splashed, unplug Onboard Battery Charger and immediately wash
affected area with clean water away from the battery and charger. Continue washing area until medical
help arrives.
3. Turn vehicle ignition off before making cable connections. Vehicle’s engine must be cooled down before
making cable connections.
REV 07g
SKU 93258
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4. Connect Battery Charger cables to proper polarities. Connect black cable to the negative battery terminal,
and the red cable to the positive battery terminal. Failure to do so could result in sparks, possible fire
and severe personal injury.
5. Keep cables clear of fan blades, belts, pulleys, and other moving parts of the engine that may cause
injury, or damage to the Battery Charger.
6. Use Battery Charger in well ventilated areas to prevent the accumulation of explosive gases.
7. Do not allow the Black and Red battery cables or terminals to touch.Failure to adhere to these directions
could result in severe personal injury. If this happens, sparks will occur that can melt connection lugs,
or other metal objects, and create the potential for fire. To help reduce the hazards involved, remove
all jewelry, watches, and other metal articles before working near the battery.
8. Use only with vehicles and boats with 12 volt electrical systems and lead-acid
based batteries.
9. Remove the keys from the vehicle before plugging in charger.
10. Keep extension cord off the ground and away from water.
11. Always connect the Line Cord to a Ground Fault Circuit Interrupter (GFCI) protected electrical outlet.
12. Do not attempt to start a vehicle while this charging unit is plugged in.
13. Periodically check on the progress of the trickle charge. Do not leave this product unattended for hours
without periodically checking on it’s operation.
14. Working near an engine is inherently dangerous: fans can start without warning even with the ignition
off, belts will move rapidly while the engine is running, hazardous and flammable materials are present
within the engine compartment, and radiator fins can cause serious cuts. If you are not qualified to
work near such hazards, a qualified mechanic should install the charger.
Note: The charger is designed to work automatically, cycling on and off by sensing the battery voltage. It
is mentioned above to not leave this product unattended for hours; this is because in some circumstances
the Battery Charger can overheat if it is attempting to recharge a low battery, or one that is damaged or has
sulfonated plates. The charger is to be used on fully charged batteries in good condition. Its only
purpose is to maintain the level of charge at approximately 12 volts.
Battery Precautions
1. Read all instructions and warnings on the battery before charging it.
2. Do not expose the battery to rain or wet conditions.
3. To avoid damage of cable and plug, never pull the cable to disconnect the Battery Charger.
4. Do not use the Battery Charger if the cables or plugs are damaged.
5. Repairs should be carried out by a qualified technician.
6. Do not touch the battery poles with any conductive source.
7. If the battery is removed, do not store the battery in a box with other metal objects.
SKU 93258
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GROUNDING
WARNING!
Improperly connecting the grounding wire can result in the risk of electric
shock. Check with a qualified electrician if you are in doubt as to whether
the outlet is properly grounded. Do not modify the plug provided with the
tool. Never remove the grounding prong from the plug. Do not use the tool
if the power cord or plug is damaged. If damaged, have it repaired by a ser-
vice facility before use. If the plug will not fit the outlet, have a proper outlet
installed by a qualified electrician.
GROUNDED TOOLS:TOOLS WITH THREE PRONG PLUGS
1.
Tools marked with “Grounding Required” have a three wire cord and three prong
grounding plug. The plug must be connected to a properly grounded outlet. If
the tool should electrically malfunction or break down, grounding provides a low
resistance path to carry electricity away from the user, reducing the risk of electric
shock.
2.
3.
The grounding prong in the plug is connected through the green wire inside the
cord to the grounding system in the tool. The green wire in the cord must be the
only wire connected to the tool’s grounding system and must never be attached to
an electrically “live” terminal.
Your tool must be plugged into an appropriate outlet, properly installed and grounded
in accordance with all codes and ordinances.
EXTENSION CORDS
1.
2.
Grounded tools require a three wire extension cord.
As the distance from the supply outlet increases, you must use a heavier gauge
extension cord. Using extension cords with inadequately sized wire causes a serious
drop in voltage, resulting in loss of power and possible tool damage. (See Figure
C, next page.)
3.
The smaller the gauge number of the wire, the greater the capacity of the cord. For
example, a 14 gauge cord can carry a higher current than a 16 gauge cord.
(See Figure C.)
4.
5.
When using more than one extension cord to make up the total length, make sure
each cord contains at least the minimum wire size required. (See Figure C.)
If you are using one extension cord for more than one tool, add the nameplate
amperes and use the sum to determine the required minimum cord size.
(See Figure C.)
6.
If you are using an extension cord outdoors, make sure it is marked with the suffix
SKU 93258
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“W-A” (“W” in Canada) to indicate it is acceptable for outdoor use.
7.
8.
Make sure your extension cord is properly wired and in good electrical condition.
Always replace a damaged extension cord or have it repaired by a qualified electrician
before using it.
Protect your extension cords from sharp objects, excessive heat, and damp or wet
areas.
RECOMMENDED MINIMUM WIRE GAUGE FOR EXTENSION CORDS*
NAMEPLATE
AMPERES
EXTENSION CORD LENGTH
(At Full Load)
25 Feet
18
50 Feet
75 Feet
18
100 Feet
150 Feet
0 - 2.0
2.1 - 3.4
3.5 - 5.0
5.1 - 7.0
18
18
18
16
18
16
14
12
16
14
12
12
18
18
18
16
18
14
SYMBOLOGY
Unpacking
When unpacking, check to make sure that the product is intact and undamaged.
If any parts are missing or broken, please call Harbor Freight Tools at the number on the cover of this manual.
SKU 93258
For technical questions, please call 1-800-444-3353.
Page 6
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Installation
The Battery Charger must be installed near the battery in the vehicle. Brackets are provided for this
purpose.You may mount the Battery Charger against the vehicle battery or on the motor compartment
wall. Be sure to allow at least 2-1/2” clearance in front of
the Plug in Access door.
1. Motor CompartmentWall mounting: Use Brackets A and
B as shown in Figure 1.Using the supplied bolts, attach the
brackets and the Battery Charger to the motor compartment
wall. Be careful not to damage any wires, hoses or other
components when attaching.
2. Battery mounting: Use all three brackets as shown in
Figure 2 to mount the Battery Charger against the vehicle
battery. All brackets are bolted together, and Bracket C is
slipped underneath the battery.
3. Ensure that the ignition is off. Connect the Red cable to
the Positive pole of the battery. Connect the Black cable to
the Negative pole of the battery. Make sure that there is a
good connection between the cables and the battery posts.
Make sure that all connections are tight.
Figure 1
Plug in access
Door
WARNING: Do not damage any cables, hoses or components when installing the brackets of battery
Charger.
Be sure the Battery Charger is firmly attached and will not come loose during normal driving or an
unforeseen sudden stop.
Periodically check the Battery Charger to be sure it remains in place. Make any adjustments as
needed.
WARNING: If the battery Charger comes loose, it may become damaged or do damage to engine
components.
SKU 93258
For technical questions, please call 1-800-444-3353.
Page 7
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Operation
Caution: The Onboard Battery Charger is not acid resistant. Be careful not to spill acid during battery
maintenance, and inspect the Onboard Battery Charger carefully before use.
1. With the vehicle turned off, plug the 3 wire Power Cord (not included) into the Battery Charger and then
into an appropriate, GFCI protected outlet.
2. Observe the LED lights on the Battery Charger to determine the current status of the charger and
battery.
LED
Color
ON /
OFF
Condition
Check power outlet for 120 Volts AC or
check for reversed polarity.
Green
Green
OFF
ON
Indicates correct polarity.
Battery voltage is at least 1 volt less
than 14 VDC, and unit is charging bat-
tery.
Orange
Orange
OFF
ON
Battery charger voltage is approx. 14
VDC, and charging has stopped.
In general, a lighted Green LED indicates that battery polarity is correct. A lighted Orange LED
indicates that the battery has finished charging.
3. When the battery is fully charged, the Battery Charger will automatically shut off.This will be indicated
by the Orange LED illuminating.
4. WARNING: Be sure to unplug the power cord from the charger before operating the vehicle.
Maintenance
1. Protect the Battery Charger from damage which may be caused by flooding or accumulation of cor-
rosive or greasy dirt. Occasionally wipe down the case and power cords with a slightly damp cloth. Be
careful not to touch energized terminals. You may use a light detergent or grease cutter.
2. Periodically check the Battery Charger mounting to be sure it remains firm.If the Battery Charger comes
loose, it can easily be damaged or damage other components within your vehicle engine compart-
ment.
3. Avoid corrosion of the battery terminals. Clean them periodically with a base solution such as dissolved
baking soda (not included).You may wish to install anticorrosion battery post pads (not included).
4. The Battery Charger has no user serviceable parts. Not assembly diagram or parts list is included in
this manual.
REV 08h
SKU 93258
For technical questions, please call 1-800-444-3353.
Page 8
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LIMITED 90 DAY WARRANTY
Harbor Freight Tools Co. makes every effort to assure that its products meet high
quality and durability standards, and warrants to the original purchaser that this product
is free from defects in materials and workmanship for the period of 90 days from the date
of purchase. This warranty does not apply to damage due directly or indirectly, to misuse,
abuse, negligence or accidents, repairs or alterations outside our facilities, criminal activity,
improper installation, normal wear and tear, or to lack of maintenance.We shall in no event
be liable for death, injuries to persons or property, or for incidental, contingent, special
or consequential damages arising from the use of our product. Some states do not allow
the exclusion or limitation of incidental or consequential damages, so the above limitation
of exclusion may not apply to you. THIS WARRANTY IS ExPRESSLY IN LIEU OF ALL
OTHER WARRANTIES, ExPRESS OR IMPLIED, INCLUDING THE WARRANTIES OF
MERCHANTABILITY AND FITNESS.
To take advantage of this warranty, the product or part must be returned to us with
transportation charges prepaid. Proof of purchase date and an explanation of the com-
plaint must accompany the merchandise. If our inspection verifies the defect, we will either
repair or replace the product at our election or we may elect to refund the purchase price
if we cannot readily and quickly provide you with a replacement. We will return repaired
products at our expense, but if we determine there is no defect, or that the defect resulted
from causes not within the scope of our warranty, then you must bear the cost of returning
the product.
This warranty gives you specific legal rights and you may also have other rights
which vary from state to state.
3491 Mission Oaks Blvd. • PO Box 6009 • Camarillo, CA 93011 • (800) 444-3353
REV 08d
SKU 93258
For technical questions, please call 1-800-444-3353.
Page 9
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