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70079
30 AMP,
FUSE SLOT CIRCUIT AMPERAGE
DRAW MEASUREMENT TOOL
TM
Owner’s Manual & Safety Instructions
Save This Manual Keep this manual for the safety warnings and precautions, assembly,
operating, inspection, maintenance and cleaning procedures. Write the product’s serial number in the back
of the manual (or month and year of purchase if product has no number). Keep this manual and the receipt
in a safe and dry place for future reference. 24j
When unpacking, make sure that the product is intact
and undamaged. If any parts are missing or broken,
please call 1-800-444-3353 as soon as possible.
Copyright
©
2023 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.
Read this material before using this
product. Failure to do so can result in
serious injury. SAVE THIS MANUAL.
Page 2 For technical questions, please call 1-800-444-3353. Item 70079
IMPORTANT SAFETY INFORMATION
Work Area Safety
1. Keep your work area clean and well lit.
Cluttered benches and dark areas
may cause accidents.
2. Do not connect or disconnect the Fuse Slot Tester
while the ignition is on or the engine is running.
3. When working on a vehicle with the engine running,
be careful of hot or moving engine components.
Keep well clear of moving engine parts.
4. Before testing a vehicle, engage the
parking brake and chock the tires.
5. NEVER smoke or allow a spark or flame
in vicinity of battery or engine.
6. Carbon Monoxide is produced while the
vehicle’s engine is operating and is deadly in
a closed environment. Early signs of carbon
monoxide poisoning resemble the flu, with
headaches, dizziness, or nausea. If you have
these signs, the work area may not be vented
properly. Get fresh air immediately. Operate
the vehicle in a well-ventilated work area.
7. Do not operate the Fuse Slot Tester in explosive
atmospheres, such as in the presence of
flammable liquids, gases, or heavy dust.
8. Keep a fire extinguisher suitable for gasoline/
chemical/electrical fires nearby.
9. Use extreme caution when working around
the ignition coil, distributor cap, ignition wires
and spark plugs. These components create
hazardous voltages when the engine is running.
10. Keep bystanders, children and visitors away
while operating the Fuse Slot Tester.
11. This product is not a toy. Do not allow
children to play with or near this item.
12. Use as intended only.
13. Inspect before every use; do not use
if parts are loose or damaged.
14. Do not place the Fuse Slot Tester
on any unstable surface.
15. Handle the Fuse Slot Tester with care. If
the Fuse Slot Tester is dropped, check
for breakage and any other conditions
that may affect its operation.
16. Keep the Scan Tool dry, clean, free from oil, water
or grease. Use a mild detergent on a clean cloth to
clean the outside of the Scan Tool, when necessary.
17. Store the Fuse Slot Tester and accessories in
a locked area out of the reach of children.
18. Maintain product labels and nameplates.
These carry important safety information.
If unreadable or missing, contact
Harbor Freight Tools for a replacement.
Electrical Safety
1. Do not use the Fuse Slot Tester
while standing in water.
2. Avoid body contact with grounded surfaces such
as pipes, radiators, ranges and refrigerators.
3. Do not expose the Fuse Slot Tester to rain or wet
conditions.
Water entering the Fuse Slot Tester
increases the risk of electric shock.
4. Make sure your hands are dry before
operating the Fuse Slot Tester.
Personal Safety
1. Wear ANSI-approved safety goggles during use.
2. Do not wear loose clothing or jewelry.
Keep your hair, clothing, and gloves away from
moving parts. Loose clothes, jewelry, or long
hair can be caught in moving parts.
3. Do not use the Fuse Slot Tester while tired
or under the influence of drugs, alcohol,
or medications. A moment of interruption
can result in serious personal injury.
4. 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.
5. The warnings, precautions, and 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.
Service
There are no user serviceable parts. Fuse Slot Tester service must
be performed only by qualified repair personnel.
Page 3For technical questions, please call 1-800-444-3353.Item 70079
Specifications
Display Screen LCD
Resolution 0.1A
Accuracy
+/- (2.0% + 2)
Electrical Rating 30A / 48V @ 10 Seconds
Compatible Fuse Types
Micro, Mini, ATC/ATO
Battery
A23 12V Alkaline (included)
Functions
Fuse Slot
Tester
ATO Fuse Jack
Fuse Adapter
Mini / Micro Adapter
Fuse Clip
Power
Tester
Fuse
Operating 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.
CAUTION! TO PREVENT INJURY: Do not exceed 30 Amps when measuring.
NOTICE: Do not test circuits longer than 10 seconds or overheating can occur.
1. Turn off ignition / engine.
2. Locate desired circuit / fuse in fuse box and remove.
3. Insert the fuse into the ATO Fuse Jack.
• If fuse is Mini or Micro style, insert fuse
into Mini / Micro adapter, and then insert
adapter into ATO Fuse Jack. Connect
ATO Fuse Jack to Tester Fuse.
4. Insert ATO Fuse Jack into fuse slot for
circuit being tested in the fuse box.
• If fuse slot is Mini or Micro style, insert ATO
Fuse Jack into either the Mini or Micro Fuse
Adapter, then plug the adapter into the fuse
slot for the circuit being tested in the fuse box.
5. Press Power on Fuse Slot Tester.
6. Turn on power to circuit (engine may be running).
Amperage measurements will be displayed on the
Fuse Slot Tester display. Turn off ignition / engine
before ten seconds has expired.
Note: Do not disconnect Fuse Slot
Tester while engine is running!
7. Disconnect Fuse Slot Tester from fuse box.
Note: Do not touch ATO Fuse jack, Adapter,
or fuse legs for at least five minutes;
they can become hot during testing.
User-Maintenance Instructions
Procedures not specifically explained in this manual must
be performed only by a qualified technician.
Cleaning and Maintenance
1. BEFORE EACH USE, inspect the general
condition of the tool. Check for:
• loose hardware,
• damaged cord/electrical wiring,
• cracked or broken parts, and
• any other condition that may
affect its safe operation.
2. AFTER USE, wipe external surfaces
of the tool with clean cloth.
Battery Replacement
1. Battery symbol will appear when
the battery requires replacement.
2. Remove screw and open battery compartment.
3. Remove battery and dispose of properly.
4. Install new battery in correct polarity, close
compartment and replace screw. See battery
type in “Specifications” on page 3.
Record Product’s Serial Number Here:
Note: If product has no serial number, record month and year of purchase instead.
Note: Replacement parts are not available. Reference UPC 193175488657.
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 complaint 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.
26677 Agoura Road • Calabasas, CA 91302 • 1-800-444-3353
TM
