Wolo 418-LED Powerhouse - Manual (Page 2)

5. The compressor should be mounted vertically, with its air outlet facing down.
6. Drill a 5/16 inch mounting hole. Using the hardware shown in Fig. 3, secure com-
pressor.
CAUTION: Plastic tubing between compressor and trumpets
should not have sharp bends or kinks which might stop or reduce air
flow, resulting in reduced sound output. Fig. 4.
ELECTRICAL CONNECTIONS
7. Electrical Connections – Using Vehicle’s Factory Horn Switch
IMPORTANT: You are not required to use the relay supplied with the kit because the
vehicle factory system already has a relay.
A. For two (2) wire systems: If a vehicle’s factory horn has two (2) terminals, simply
transfer the wires to the compressor’s terminals.
IMPORTANT: when testing the horns, if compressor motor turns on but the horn
does not sound, reverse the wires connected at the bottom of the compressor.
B. For one (1) wire systems: If a vehicle’s factory horn has one (1) terminal simply
transfer wire to the compressor’s positive (+) terminal.
C. Using a 16-gauge wire, the compressors’ negative terminal is connected to any
metal body bolt. A ground connection should be free of rust and paint.
8. Electrical Connections for a New Horn Button Switch:
Install the relay in a dry location with the terminals facing downward near the com-
pressor. Refer to Figure 5 for wiring
A. Connect relay terminal 87 to the positive terminal at the bottom of the compressor.
Use16-gauge wire or heavier.
B. Connect relay terminal 85 to the horn switch terminal. The other horn switch termi-
nal is connected to ground, (body of vehicle). An 18-gauge wire is suggested for
this connection.
C. Connect relay terminals 30/86 to positive (+) 12-volt battery, alternator or acces-
sories. Use 16-gauge or heavier wire. A 20-ampere fuse should be installed as
shown in Figure 5.
WEATHER PROTECTION COVERS
9. It is recommended that you always use
the protection covers. They will prevent
damage to the trumpet’s diaphragm from
rain, bugs, dirt, etc. Assemble Horn
Protection Covers as shown in Fig. 6 below.
Do not tighten screws, brackets are placed
into position on the front of each trumpet and
then tighten screws.
Fig. 6
Fig. 4
G. Recap of Terminal Connections for New Horn Switch:
Terminals: 30/86: the two terminals are connected to 12 volt positive (+) using a
fuse. Terminal: 85 is connected to the horn switch. The other terminal of the horn
switch is connected to ground. Terminal: 87 is connected to the positive (+) ter-
minal of the compressor.
LED WIRING INSTRUCTIONS
THIRD BRAKE LIGHT (Turns on only when brake lights are on)
10. Connect the LED’s red wire to the wire that powers the vehicle’s brake light, a 3-
ampere fuse should be installed as shown in Fig. 7.
11. Ground the black wire to any metal body bolt. Be sure to clean the metal surface
around bolt to be free from paint and rust to insure a good ground connection. If a longer
wire is needed to reach the vehicle’s power source, lengthen the horn’s LED wire using
the same twenty (20) gauge wire or heavier.
IMPORTANT: Make sure all connections are taped and secure.
MARKER LIGHT (Turns on and stays on when vehicle’s running
lights are on)
12. Connect the LED’s red wire to the wire that powers the vehicle’s marker light, a 3-
ampere fuse should be installed as shown in Fig. 7.
13. Ground the black wire to any metal body bolt. Be sure to clean the metal surface
around bolt to be free from paint and rust to insure a good ground connection. If a longer
wire is needed to reach the vehicle’s power source, lengthen the horn’s LED wire using
the same twenty (20) gauge wire or heavier.
IMPORTANT: Make sure all connections are taped and secure.
If you need help installing your new Wolo horn, our technicians are available to answer
your questions, Monday thru Friday, from 9 AM to 4 PM EST at 1-888-550-4676.