wiring up my air horns. How do i do it?
Werdy
the compressor and horns to the front just behind the grill. But i am unsure
how to wire them up.
they came with a 12v 30amp relay with markings of 85, 86 ,87 and 30.
what i would like to do is hook them up to a switch independent of my normal
horn. However the cryptic instructions don't show me how to do that! it
appears i need a fuse and that the relay mark 85 actually is connected
straight to my battery, but my dad reckons that it would be too much power
and blow fuses all the time. And no fuse came with the air horns so what
size fuse would i need?
Can someone explain to me how to wire my air horns up to a switch, and if i
did wire them up through my normal horn, can i have a toggle switch (on/off)
so that if the switch is off then the normal horn works and if it is on then
both the normal and air horns work?
And if there is another newsgroup more suited to this question could u
please tell me what it is!
Hopefully someone has done this and can explain it to me!! :) Cause me and
my dad have no idea! lol
Thanks for your time....
Andy
Scott Badman
news:aco65d$qpqrq$1...@ID-120252.news.dfncis.de...
> i just got a set of air horns for my little corolla hatchback and i
mounted
> the compressor and horns to the front just behind the grill. But i am
unsure
> how to wire them up.
>
> they came with a 12v 30amp relay with markings of 85, 86 ,87 and 30.
>
> what i would like to do is hook them up to a switch independent of my
normal
> horn. However the cryptic instructions don't show me how to do that! it
> appears i need a fuse and that the relay mark 85 actually is connected
> straight to my battery, but my dad reckons that it would be too much power
> and blow fuses all the time. And no fuse came with the air horns so what
> size fuse would i need?
>
The contact 85 sounds like one of the switch contacts. Think of the relay
has a heavy duty switched, activated by a voltage supply across the coil. It
is quite fine to hook up this terminal 85 to the battery, when the horn
isn't activated, no current will be drawn.
As for fuse rating, I'd start with 15A. If it blows, just move up a rating
:)
> Can someone explain to me how to wire my air horns up to a switch, and if
i
> did wire them up through my normal horn, can i have a toggle switch
(on/off)
> so that if the switch is off then the normal horn works and if it is on
then
> both the normal and air horns work?
>
I'm not sure on the paticulars of your relay, but we'll assume that 85 and
the terminal directly opposite are the switch part and the other 2 are the
coil part.
So first wire thus -
+12v to fuse to term. 85, then from terminal opposite 85 to horns +ve then
horns -ve to ground (car body)
Then wire -
+12v to horn switch to relay (the coil is non polar ie can be hooked up
either way) then relay (should be one contact left) to ground.
To include the horn button (steerig wheel) in simply wire in line with the
switch
Note! The horn pad on pretty much all cars connects straight to negative, so
the wiring config would be thus - +12v to relay, then relay (last contact
left) to air horn switch, then switch to horn pad in steering wheel, then
the pad grounds itself.
And lastely, have fun scaring the shit out of right lane hogs and slow old
drivers ;)
--
Scott Badman
'92 Calais
Werdy
work when i hit the horn button on the steering wheel, and if the switch is
on, then the air horns work, if its off, then only the normal horn works
I have pin 87 connected directly to my battery with a 20amp fuse inline.
I have pin 30 attached to the positive of my air horn compressor.
I have the negative of the air horn compressor grounded.
I have pin 86 grounded ready for my toggle switch.
Pin 85 is attached to my switch.
Now the problem is the other connection on the switch.
If i connect the switch to my normal horn, by basically having a wire from
the switch to the bare metal of the horn that has constant power, with the
switch on, my air horns make noise! With the switch off they stop working of
course, the horn has constant power at the steering wheel, with the ignition
on or off. Which from what i was told, i had to ground pin 86.
Any advice to help me out is very much appreciatted.
And i do have a wiring diagram in a book on my corrolla, the horn wiring
specifically i mean. If i scanned it and emailed it to you, would that help
athol??
Thanks again for your time!
Andy
"athol" <athol_S...@idl.net.au> wrote in message
news:1022378830.105087@bigboy...
> Werdy <werd...@hotmale.com> wrote:
> > they came with a 12v 30amp relay with markings of 85, 86 ,87 and 30.
>
> Standard relay. Pins 85 and 86 are the coil, 30 is power into contacts,
> 87 is output from contacts. Run a wire from the battery + thru a fuse to
> pin 30, wire pin 87 to the compressor +. Earth the - side of the
> compressor. To make things easy, connect one of 85 or 86 to pin 30 (+),
> then run a wire from the other one to a momentary switch in the car.
> Earth the other side of the switch under the dash.
>
> The only caveat is that the relay could have a diode in it across the
> solenoid coil (to absorb the back EMF of the collapsing field), in
> which case the fuse will blow the first time you push the button, and
> you'll have to swap the wires between 85 and 86. Unlikely, though.
>
> The fuse will need to big enough to drive the compressor. If it is
> labelled 7.5A, for example, you would use a 10A fuse.
>
> > Can someone explain to me how to wire my air horns up to a switch, and
if i
> > did wire them up through my normal horn, can i have a toggle switch
(on/off)
> > so that if the switch is off then the normal horn works and if it is on
then
> > both the normal and air horns work?
>
> That depends upon the design of the wiring in your car. If I looked at
the
> wiring diagram of the car, it would take less than 2 minutes to work out
> how to wire it... If the horn button earths a wire like most do, you just
> need to find the correct wire, feed the output of the button to the
> middle (common) of a switch, put the original wire one end and the wire
> from your air horn relay to the other end. If you're not confident, don't
> cut into the original wiring - you don't want to stuff something else in
> the car!
>
>
> Athol
macks
>
> If i connect the switch to my normal horn, by basically having a wire from
> the switch to the bare metal of the horn that has constant power, with the
> switch on, my air horns make noise! With the switch off they stop working
of
> course, the horn has constant power at the steering wheel, with the
ignition
> on or off. Which from what i was told, i had to ground pin 86.
>
> Any advice to help me out is very much appreciatted.
That makes it sound as if the horn button in the steering wheel is grounded
upon pressing it. Check if this is true with a multimeter or something. If
it is, you've got to wire +12 to 85 (run a patch from 87), and wire 86 to
the switch on your dash. Then tap a wire from the other side of the switch
into the horn wire (thats +12 normally). That way, when the outboard switch
is closed, the coil in the relay is grounded by pressing the normal horn
button, closing contacts, starting compressor, and making a big fuck-off-now
noise :) Be careful of mounting the outboard switch, as if its dodgy or made
that way, grounding the body of it could close the relay and fire off the
air horns...
The only thing I'd be wary of is whether the constant +12 horn wire is
adequately fused.. it probably is, but it might be worth your while putting
in a 1A inline fuse in the wire that goes from horn switch to outboard
switch, as close to the patch to the horn wire as accessible. That way,
you're safe.
hth, Nick
--
http://www.iinet.net.au/~mcn/macks/main.htm
athol
> Ok this is what i have so far. They work with the switch but i want it to
> work when i hit the horn button on the steering wheel, and if the switch is
> on, then the air horns work, if its off, then only the normal horn works
Firstly, to do what you want, you will need a three-pin (changeover)
switch, with a common and two ends. An on-off switch will not do
the job unless you want to add a changeover relay (you don't!)
> I have pin 87 connected directly to my battery with a 20amp fuse inline.
> I have pin 30 attached to the positive of my air horn compressor.
This will work, but theoretically, the wires should be the opposite
way round. Doesn't matter in this case.
> I have pin 86 grounded ready for my toggle switch.
> Pin 85 is attached to my switch.
I'll come back to these...
> If i connect the switch to my normal horn, by basically having a wire from
> the switch to the bare metal of the horn that has constant power, with the
> switch on, my air horns make noise! With the switch off they stop working of
> course, the horn has constant power at the steering wheel, with the ignition
> on or off. Which from what i was told, i had to ground pin 86.
I think I know exactly what is happening here. The power at the
horn button is actually coming through the standard horn. The
wire gets earthed by the button to make the horn come on.
If you read my instructions, you will see that I said to wire one
of 85 or 86 to the power wire from the fuse you fitted, then
earth the other end through the switch. If you fit a changeover
switch, the common (middle pin) goes to the horn button, one end
to the original horn and the other end to the air horn. This
means finding the wire that goes from the horn button to the
original horn, cutting it and connecting it to the switch as
described.
> And i do have a wiring diagram in a book on my corrolla, the horn wiring
> specifically i mean. If i scanned it and emailed it to you, would that help
> athol??
No. Just find the horn button on the diagram and confirm that it
earths the wire. Alternately, pull one wire off the original
horn. Assuming no relay in original wiring, the wire at the horn
button won't have power with a wire off horn, but will earth when
pushed.
Athol
Werdy
"macks" <removeth...@iinet.net.au> wrote in message
news:acqrb8$s1b8v$1...@ID-146445.news.dfncis.de...
s.m.hayw...@gmail.com
F Murtz
horns only but you have to use relay.You would find the wire that does
not go to earth on existing horn to feed relay coil and other side of
coil to earth,then you have to get a feed from battery through a fuse
then through contacts on relay then new horn and then earth.Don't know
the numbers but could find out tonight.
feeding directly from battery will not blow fuses from extra current
Jason James
The diode will be shown on the relay cct diagram on the box. The NARVA relays come with the diode shown.
Jason
Noddy
> Guys, in the intervening *12 and a half years* I suspect the OP
> either found a suitable solution or gave up.
Lol :)
--
--
--
Regards,
Noddy.
F Murtz
>
>> On Monday, November 23, 2015 at 10:03:09 AM UTC+11, F Murtz wrote:
>>> s.m.hayw...@gmail.com wrote:
>>>> On Saturday, May 25, 2002 at 3:12:46 PM UTC+1, Werdy wrote:
>>>>> i just got a set of air horns for my little corolla hatchback and i mounted
>>>>> the compressor and horns to the front just behind the grill. But i am unsure
>>>>> how to wire them up.
>
> either found a suitable solution or gave up.
>
Jason James
> On 23/11/15 8:15 PM, Andy wrote:
>
> > Guys, in the intervening *12 and a half years* I suspect the OP
> > either found a suitable solution or gave up.
>
> Lol :)
Jason
Diesel Damo
>
> > Guys, in the intervening *12 and a half years* I suspect the OP
> > either found a suitable solution or gave up.
>
> Lol :)
>
that transmission swap in his Commodore some years ago.
Noddy
> You never know. It could be that guy Sheik Yerbouti who was doing
> that transmission swap in his Commodore some years ago.
friends I suspect no one has noticed him missing yet :)