+1 (813) 783-8058
Fax: +1 (813) 783-2407
www.hornblasters.com
Wiring Instructions
Pin 30
: This pin will connect to the battery positive terminal. You MUST use the supplied 10-gauge RED
wire for this connection. Use the supplied tan or green terminal to connect the red wire to this pin. Cut our
fuse holder in half to make two ends, and place this in-between pin 30 and the battery positive terminal.
Pin 86
: This pin will connect to a key-power source. This can be tricky if you've never installed our kits
before. You are looking to connect this pin to any circuit that is ONLY ON WHEN THE VEHICLE IS ON.
This will prevent your kit from running when the veh off. Common key-power sources include the cigarette
lighter fuse, sunroof, radio, trailer running lights, daytime running lights, etc.
Pin 85:
Route a lead from this pin to the frame of the vehicle as a ground point. You may use the supplied
Blue or Grey wire for this connection.
Pin 87:
Take the red lead coming off the compressor/tank combo and connect it directly to this pin.
Your relay is now wired and ready for use. You can use a small lead of wire to connect pins 30 & 86
together to test the relay. If you have this wired correctly, the relay should make a light 'click' sound when
the two pins are connected. This means the relay is turning on and off properly. When you start the vehicle,
it will send power to pin 86 and turn the relay on, which will allow the compressor to run.
Using A Toggle Switch Instead
You can use a toggle switch to ensure the compressor doesn't run when the vehicle is off. To do this,
locate the supplied toggle switch that came with your horn kit. Wire one lead of the toggle switch to the
output side of your inline fuse holder, and take the opposite lead of the toggle switch to pin 86 on the relay.
When you flip the switch on, the relay will switch on and allow the compressor run. Wiring your kit this way
unfortunately means that you MUST turn the switch off with the vehicle, otherwise the compressor could
run overnight and drain your battery.
Key-Power-Source (Normal Method)
If you're having trouble locating a fuse that is only hot when the vehicle is on, you can go online to
https://
fuse-box.info/.
You can use a test light to check whether or not the fuses are hot with the key in the off
position. Route the black probe/clip to the battery negative terminal (-) and use the red probe on the metal
contacts of the fuse(s) you want to check. If the light comes on, your fuse is hot. If the light does not turn
on, start the vehicle and check for current. The light should illuminate now that the vehicle is running.
Wiring the Relay
12
