HAUL MASTER 66186 Installation manual

12 VOLT MAGNETIC
LED TOWING LIGHT KIT
Model 66186
SET UP AND OPERATING INSTRUCTIONS
Diagrams within this manual may not be drawn proportionally.
Due to continuing improvements, actual product may differ slightly from the product described herein.
Distributed exclusively by Harbor Freight Tools®.
3491 Mission Oaks Blvd., Camarillo, CA 93011
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©2008 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 or replacement parts, please call 1-800-444-3353.

Page 2SKU 66186 For technical questions, please call 1-800-444-3353.
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.
IMPORTANT SAFETY INFORMATION
In this manual, on the labeling, and all other information provided with this product:
This is the safety alert symbol. It is used to alert you to potential
personal injury hazards. Obey all safety messages that follow this
symbol to avoid possible injury or death.
DANGER indicates a hazardous situation
which, if not avoided, will result in death or
serious injury.
WARNING indicates a hazardous situation
which, if not avoided, could result in death
or serious injury.
CAUTION, used with the safety alert
symbol, indicates a hazardous situation
which, if not avoided, could result in minor
or moderate injury.
NOTICE is used to address practices not
related to personal injury.
CAUTION, without the safety alert symbol,
is used to address practices not related to
personal injury.
SAFETY RULES
WARNING! Read all instructions
Failure to follow all instructions listed below may result in electric shock,
re, and/or serious injury.
SAVE THESE INSTRUCTIONS
Obey D.O.T. (Department of Transportation) and all other applicable regulations1.
regarding installation and use.
Attach lights to vehicle before moving. Loose lights are a trafc hazard.2.
Thoroughly test vehicle lights and tow lights for attachment and operation before3.
use.
DANGER
WARNING
CAUTION
Notice
CAUTION

Page 3SKU 66186 For technical questions, please call 1-800-444-3353.
Mount lights in proper orientation. Amber lights must face forward and red lights4.
must face backward. Improper orientation can confuse or distract drivers, caus-
ing a trafc hazard.
Install on a 12 V negative ground circuit only. Installing on different circuit can5.
result in electric shock, re, or property damage.
Turn off vehicle and set the parking brake before installation or use.6.
Do not use on marine trailers (such as boat trailers). Not waterproof.7.
Wear ANSI-approved impact safety goggles and heavy-duty work gloves during8.
installation and use.
Do not modify the Towing Light Kit and do not use the Towing Light Kit for a9.
purpose for which it was not intended.
Inspect before use; do not use if parts are loose or damaged. Inspect wires and10.
connections for insulation damage or loose wires and repair before use.
People with pacemakers should consult their physician(s) before use. Electro-11.
magnetic elds in close proximity to heart pacemaker could cause pacemaker
interference or pacemaker failure.
This product is not a toy. Keep it out of reach of children.12.
Check light position and function regularly when towing, especially on rough or13.
uneven surfaces, or in windy conditions. The magnets may loose their grip on
the vehicle under extreme circumstances.
Remove conductive articles (such as metal jewelry, watches, and other items)14.
before installing light kit. Conductive objects can cause an electrical short re-
sulting in re, property damage, or personal injury.
The warnings, precautions, and instructions discussed in this instruction manual15.
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.
SAVE THESE INSTRUCTIONS.
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 manual as soon as possible.

Page 4SKU 66186 For technical questions, please call 1-800-444-3353.
SPECIFICATIONS
Electrical Requirements 12VDC
LED Types Amber and Red
Connector 4-way Flat
WIRING
Note: Some towing vehicles may already have a 4-way Flat Connector, “Trunk” plug
wired in. For those vehicles, skip the following wiring instructions.
If you do not have experience
doing this type of automotive
electrical wiring or if the
wiring in your vehicle differs
from that explained below,
have an automotive service
technician connect the wiring.
Identify the towing vehicle’s wires1.
in the trunk that correspond to
the circuits indicated in the Wiring
Color Code diagram to the right.
The white ground wire from the
Pigtail (22) may be connected to a
bolt or appropriate component on
the vehicle to establish a ground
instead of a ground wire.
2. Connect the wires from the Wiring Pigtail (22) to the proper vehicle circuit wires
using Wire Splices (21). No stripping or cutting is usually required to connect
wires using the included Splices. Follow these three steps and refer to the
illustration to the right:
Insert the end of the Pigtail (22)a.
wire into the ‘dead-end’ channel
of the Splice. Insert the wire all
the way to the end of the chan-
nel as shown.
Place the Splice around theb.
correct vehicle circuit wire.
Make sure both wires stayc.
properly in place while the
cover is closed until it snaps
together.
Verify that all wires are held se-3.
curely.
Wiring Color Code
Note: This is the wiring conguration of the
“Trunk” 4-way Flat Connector (23). The
towing vehicle may have a different wir-
ing color code.
WHITE
Ground
BROWN
Running Lights
YELLOW
Left Stop and
Turn Lights
GREEN
Right Stop and
Turn Lights
“Trunk” 4-way Flat
Connector (23)
Wiring
Pigtail (22)
Wire Splice (21) Usage
B) Place splice around
vehicle wire
C) Close Splice
cover securely
A) Insert Pigtail (22) wire
into ‘dead-end’ channel

Page 5SKU 66186 For technical questions, please call 1-800-444-3353.
Plug the “Trunk” Connector (23) into the “Trailer” Connector (18).4.
5. WARNING! If the Wire Splices (21) are used improperly and damage
the vehicle’s wiring, the vehicles rear lights may fail, resulting in a trafc
hazard. Have an assistant operate the vehicle’s lights while you carefully
check that the vehicle lights and the towing lights all work properly after
installation. If any function of the vehicle or towing lights does not work, do
not drive the vehicle. Carefully inspect the splice connection and the circuit that
failed and repair the problem and retest before use.
Disconnect the “Trailer” Connector (18) if the light kit is not going to be used yet.6.
SET UP
To help avoid scratches, clean the mounting locations and clean the protective1.
labels under the lights.
Set the lights on the back of the vehicle being towed so that the2. RED side of
each light faces backwards. Set the light that has a green wire on the right side
and the light that does not have a green wire on the left side.
Make sure all wires are secured with enough slack to prevent binding when turn-3.
ing, but controlled enough to prevent roadway or moving part contact.
Plug the “Trunk” Connector into the “Trailer” Connector.3.
4. WARNING! Have an assistant operate the vehicle’s lights while you
carefully check that the vehicle lights and the towing lights all work prop-
erly.
Both tow lights should illuminate when the towing vehicle’s running lights are•
switched on.
The tow lights should both light brightly as you apply the brake.•
The tow light with a green wire should blink brightly with the right turn signal.•
The tow light without a green wire should blink brightly with the left turn signal.•
If ANY function of the vehicle lights or towing lights does not work, do not
drive the towing vehicle until all lights are repaired and retested success-
fully.
The tow light kit is now ready for use. It will automatically illuminate when turn5.
and brake signals in the towing vehicle are used.
6. WARNING! Check light position and function regularly when towing,
especially on rough or uneven surfaces. The magnets cannot hold the lights
to the vehicle in extreme circumstances.
After towing, disconnect “Trailer” Connector, remove tow lights from towed ve-7.
hicle, clean with a moist cloth, and store in dry location out of reach of children.

Page 6SKU 66186 For technical questions, please call 1-800-444-3353.
PARTS LIST & ASSEMBLY DIAGRAM
Wire Splices (21) not shown.
Wiring Pigtail (22) not shown.
Trunk 4-Way Flat Connector not shown.
Part # Description Qty. Part # Description Qty.
1 Amber Front Lens 2 14 Magnet 2
2 Red Rear Lens 2 15 Nut 2
3 Bracket 2 16 Screw 8
4 Circuit Board with Amber LED 2 17 Power Cord 1
5 Circuit Board with Red LED 2 18 “Trailer” 4-Way Flat Connector 1
6 Threaded Shaft 2 19 Left-Right Cord 1
7 Shell 2 20 Bulb Wire 6
8 Spring Washer 2 21 Wires Splices 4
9 Flat Washer 2 22 Wiring Pigtail 1
10 Ground Terminal 2 23 “Trunk” 4-Way Flat Connector 1
11 Nut 2 24 Protective Label 2
12 Screw 2 25 Screw (M3 x 16) 4
13 Cover 2 26 Nut (M3) 4

Page 7SKU 66186 For technical questions, please call 1-800-444-3353.
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 ac-
cidents, 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 conse-
quential 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 veries 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 specic 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 • [phone]
PLEASE READ THE FOLLOWING CAREFULLY
THE MANUFACTURER AND/OR DISTRIBUTOR HAS PROVIDED THE PARTS LIST AND
ASSEMBLY DIAGRAM IN THIS MANUAL AS A REFERENCE TOOL ONLY. NEITHER THE
MANUFACTURER OR DISTRIBUTOR MAKES ANY REPRESENTATION OR WARRANTY
OF ANY KIND TO THE BUYER THAT HE OR SHE IS QUALIFIED TO MAKE ANY REPAIRS
TO THE PRODUCT, OR THAT HE OR SHE IS QUALIFIED TO REPLACE ANY PARTS OF
THE PRODUCT. IN FACT, THE MANUFACTURER AND/OR DISTRIBUTOR EXPRESSLY
STATES THAT ALL REPAIRS AND PARTS REPLACEMENTS SHOULD BE UNDERTAKEN
BY CERTIFIED AND LICENSED TECHNICIANS, AND NOT BY THE BUYER. THE BUYER
ASSUMES ALL RISK AND LIABILITY ARISING OUT OF HIS OR HER REPAIRS TO THE
ORIGINAL PRODUCT OR REPLACEMENT PARTS THERETO, OR ARISING OUT OF HIS OR
HER INSTALLATION OF REPLACEMENT PARTS THERETO.
Record Product’s Serial Number Here:
Note: If product has no serial number, record month and year of purchase instead.
Note: No replacement parts are available for this product.