Wolo HWK-1 User Manual

MODEL HWK-1

Air Horn Wiring Kit

Kit Is Designed For An Easy Hook-Up

Using Independent Horn Switch

INSTALLATION INSTRUCTIONS

Your purchase of a Wolo air horn wiring kit is a perfect choice for an easy and professional installation of any direct drive
air horn (no air tank) requiring a new horn button switch. Wolo’s products are manufactured with the finest materials.
Each wiring kit is tested to insure it meets all manufacturing specifications, before it is packaged. If you need help
installing this product, our technicians are available to answer your questions, Monday through Friday from 9 AM to 4
PM EST by calling 1-888-550-HORN (4676).

MOUNTING RELAY Fig. #1

(Relay is not included in kit)

1. The relay that was provided with your horn needs to be mounted in a dry location with the
terminals facing downward.

2. Use the relay’s mounting bracket as a template, mark the hole location and drill to
size 1/8”.

3. Secure the relay to the mounting location using the sheet metal screw provided.

CONNECT PLUG TO RELAY Fig. #2

4. Connect the wiring kit’s square female plug to the relay. NOTE: The plug can only mate with the

relay in one position.

HORN SWITCH WIRING & MOUNTING Fig. #3-5

5. Find a mounting location for the horn button switch (provided) that can be easily reached by the
vehicle’s driver. Use the mounting bracket of the horn button switche as a template, mark the
two hole locations and drill to size 1/8”. See Fig. #3

PLUG WIRING

6. SWITCH TERMINALS: There are two small screws on the bottom of the horn button switch,
which are electrical contacts that you will connect the wires to. See Fig. #4.

7. SWITCH TERMINAL-1: Connect the gray wire from the wiring kit’s plug to the horn button

switch. Cut the gray wire to length and strip back the plastic insulation so that 1/4” of wire is
exposed. Insert the wire into the spade terminal and crimp terminal. Make sure that the wire is
securely held in the terminal by lightly pulling on the wire while holding the terminal.
Connect the terminal to switch, place the spade terminal under one of the horn button’s contact
screw and tightened. NOTE: It does not make a difference which of the switch’s contact
screws is used to secure the gray wire. See Fig #4.

8. SWITCH TERMINAL-2: Connect the 12” gray wire with the spade terminal to the other
contact screw of the horn button switch. See Fig #4.

9. 12” GRAY WIRE: The other end of the gray wire is connected to (-) ground, such as the
negative (-) battery post or any clean metal body bolt. Cut the gray wire to length and strip back the plastic insulation
so that 1/4” of wire is exposed. Insert the wire into the spade terminal and crimp terminal. Make sure that the wire is
securely held in the terminal by lightly pulling on the wire while holding the terminal. Secure the spade terminal to (-)
ground. NOTE: IMPORTANT: Make sure that any paint or rust is cleaned from bolt and metal surface that will be in
contact with the terminal. (Sheet metal screw provided if needed.) See Fig #5.

Fig. 1

Fig. 2

Fig. 3

1/8” hole

1/8” hole

Relay not included

10. Secure the horn button switch to the mounting location using the self­tapping screws provided. See Fig #3.

11. RED WIRE with inline fuse: Is connected to POSITIVE (+) 12-volts
such as the battery, alternator and etc. See Fig #5.

12. RED WIRE without inline fuse: Is connected to the compressor terminal
marked positive or (+). Cut the red wire to length and strip back the
plastic insulation so that 1/4” of wire is exposed. Insert the wire into the
1/4” female push-on terminal and crimp terminal. Make sure that the wire
is securely held in the terminal by lightly pulling on the wire while holding the terminal. Connect the terminal to
compressor’s (+) male terminal. See
Fig. #5

13. BLACK WIRE: Is connected to the
compressors (-) terminal and the
other end of the wire will be
connected to ground, such as the
negative (-) battery post or any clean
metal body bolt. Cut the black wire
to length and strip back the plastic
insulation so that 1/4” of wire is
exposed. Insert the wire into the
spade terminal and crimp terminal.
Make sure that the wire is securely
held in the terminal by lightly
pulling on the wire while holding the
terminal. Connect the terminal to (-) ground. NOTE: IMPORTANT: Make sure any paint or rust is cleaned from bolt
and metal surface that will be in contact with the terminal. (Sheet metal screw provided if needed.) See Fig. #5

14. Secure all wires using the plastic wire ties provided to ensure that no wire touches the engine, exhaust manifold or any
moving engine parts. Installation is complete.

Fig. 4

Fig. 5

Warranty

Wolo Manufacturing Corporation (“Wolo”) warranties to the original purchaser, for three months from the date of purchase,
that this product is free from defects in workmanship and materials. If there is such a proven defect, Wolo, at its option, will
either repair or replace the item free of charge, if it is returned to Wolo within three months from the date of purchase
together with proof of purchase as described below. Wolo reserves the right to inspect any defect prior to settling any
warranty claim by repair or replacement. This warranty is limited as above provided and Wolo will not be responsible for
fire or other casualty or accident, due to neglect, abuse, abnormal use, modifications, faulty installation of this product, or
natural causes.

ANY EXPRESSED WARRANTY NOT PROVIDED HEREIN IS EXCLUDED AND DISCLAIMED. THE IMPLIED WARRANTIES
OF MERCHANTABILITYAND OF FITNESS FOR A PARTICULAR PURPOSE ARE EXPRESSLY LIMITED TO ATERM OF
THREE (3) MONTHS. UNDER NO CIRCUMSTANCES SHALLWOLO BE LIABLE TO PURCHASER OR ANY OTHER PERSON
FOR ANYSPECIAL OR CONSEQUENTIAL DAMAGES, WHETHER ARISING OUTOF BREACH OF WARRANTY OR
OTHERWISE.

To obtain warranty service, return the product prepaid, and include the original bill of sale showing the date of purchase. Provide
with the return a brief description of the problem. Also, include with the return a check or money order in the amount of $10.00 to
cover return shipping. Mail to:

Wolo Manufacturing Corp.

One Saxwood Street, Deer Park, NY 11729

Attn: Warranty Service E-mail: [e-mail]

© 2010 Wolo Mfg. Corp

All Rights Reserved.

12” Gray

Wire

12” GrayWire

GrayWire