Wolo MCHWK-2 Air Horn Wiring Kit - Manual

MODEL MCHWK-2
Air Horn Wiring Kit
Kit Is Designed For An Easy Hook-Up To The Vehicle’s Factory
Horn System For any 12-Volt Motorcycle, Car or Truck
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) to the vehicle’s factory horn system. 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.
TWO WIRE FACTORY HORN SYSTEM Fig. #3-5
If your factory horn has two separate wires connected to it, follow instructions below starting at
number 5. If your factory horn has one wire connected to it proceed to step number 11.
5. GRAY WIRE: Remove the wires that are connected to your factory horn. Then using the
insulated butt connector provided, you will connect one of the gray wires from the wiring kit’s
plug to one of the factory horn wires. Note: It does not make a difference which factory horn
wire connects to the plug’s gray wire. The terminal on the factory horn wire will need to be
removed. Strip back the wires’ plastic insulation so that 1/4” of wire is exposed and insert the
factory horn wire and one of the gray wires fully into the butt connector.
Crimp the 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. #3 & 4
6. GRAY WIRE: Using the insulated butt connector provided, connect the other
gray wire from the wiring kit plug, to the other factory horn wire. Follow the
same procedure as step #5.
7. RED WIRE with inline fuse: Is connected to POSITIVE (+) 12-volts such as the
battery, alternator and etc. See Fig. #5
8. 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
9. 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 body bolt.. Cut the
Fig. 1
Fig. 2
Fig. 3
Fig. 4
VEHICLE’S FACTORY
HORN WIRE
1/8” hole
Relay not included