Wolo MCHWK-2 Air Horn Wiring Kit User Manual Page 2

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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. 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
10. 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.
ONE WIRE FACTORY HORN SYSTEM Fig. #6-8
If your factory horn has one wire connected to it proceed to step number 11.
11. GRAY WIRE: Remove the wire that is connected to your factory horn The
terminal on the factory horn wire needs to be removed. Strip back the plastic
insulation of the horn’s wire so that 1/4” of wire is exposed. Insert the factory
horn wire and one of the gray wires from the wiring kit plug, fully into the butt
connector. Crimp the butt connector and make sure that both wires are securely held in
the connector by lightly pulling on each wire while holding the butt connector. See Fig. #6
& 7
12. GRAY WIRE: The other 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. #8
13. RED WIRE with inline fuse: Is connected to POSITIVE (+) 12-volts such the battery, alternator and etc. (Sheet
metal screw provided if needed.) See Fig. #8
14. 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
compressors (+) male terminal. See Fig. #8
15. 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. Secure the spade 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. #8
16. Secure all wires using the plastic wire ties provided so to ensure that no wire touches the engine, exhaust manifold or
any moving engine parts. Installation is complete.
Fig. 5
Fig. 6
Fig. 7
Fig. 8
VEHICLE’S FACTORY
GRAY
HORN WIRE
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