Installing the horn

[REV Bikes]

I bought a horn from Golden Motor for the Magic Pie kit, and they cannot advise me on how to install it, other than saying it is quite complicated (not as simple as plugging the red plug into the other red plug)    They say "one plug into the battery" ??
Does anyone have any advice on how to install this horn??
It is black, with 4 holes it it, and a red plug.

THANKS, rEV bikes

[GM Canada]

If you have an external controller you plug it directly into the controller. If you have and internal controller it will not work.

Gary

[REV Bikes]

Thanks Gary, wish I'd known this before, but glad I know it now
Rebecca

[MonkeyMagic]

It is black, with 4 holes it it, and a red plug.

Hey there

The horn you have WILL work with the Internal Magic Pie kit

If you purchased the 'black' one with 4 holes in it as you described then it is a 24-72v scooter horn.

To connect this, connect the red wire from the horn to the red 'led light' wire from the cable harness. Then connect the black wire from the horn to your switch wire 1, then switch wire 2 connect to ground.

So when you apply the switch, it will connect the Ground signal to the horn to allow it to function.

If you want to use the red 'push on/off' switch that is on your throttle (yellow + brown wire) then connect as described above, using the brown wire for Ground signal, and yellow connected to horn black.

The 'red' colored horn (siren) is an inducer that needs AC to work, this is the type that plugs directly into the external controllers and cannot be used by internal Magic Pie.

Toot toot !

[REV Bikes]

That's great, thanks so much for your help Monkey Magic 

[GM Canada]

People ask me questions in email all the time and I tell them I can guess at the answer, but if you want the correct answer you should try our forum

Gary

[stepir]

It is black, with 4 holes it it, and a red plug.

Hey there

The horn you have WILL work with the Internal Magic Pie kit

If you purchased the 'black' one with 4 holes in it as you described then it is a 24-72v scooter horn.

To connect this, connect the red wire from the horn to the red 'led light' wire from the cable harness. Then connect the black wire from the horn to your switch wire 1, then switch wire 2 connect to ground.

So when you apply the switch, it will connect the Ground signal to the horn to allow it to function.

If you want to use the red 'push on/off' switch that is on your throttle (yellow + brown wire) then connect as described above, using the brown wire for Ground signal, and yellow connected to horn black.

The 'red' colored horn (siren) is an inducer that needs AC to work, this is the type that plugs directly into the external controllers and cannot be used by internal Magic Pie.

Toot toot !

Can I ask you a clarification?

in my case the horn button is the green one:



could you confirm this is not an inducer and then I can use the method you described above to connect it to my horn (a scooter one, i'm planning of buying this one http://www.ebay.it/itm/290566231944?ssPageName=STRK:MEWAX:IT&_trksid=p3984.m1423.l2649 )

thanks!

[MonkeyMagic]

could you confirm this is not an inducer and then I can use the method you described above to connect it to my horn (a scooter one, I'm planning of buying this one http://www.ebay.it/itm/290566231944?ssPageName=STRK:MEWAX:IT&_trksid=p3984.m1423.l2649

Hi Stepir

That horn on your ebay link is an air horn, that type will draw too much current (2A+) for the intended output of the harness power signal.

You could use that horn with a 48V relay, and yes the green button would work in this case to activate the relay coil for switching the horn.

You would need something like you mentioned that is a transducer/buzzer type that has small current draw if you wish to wire it directly to your harness.

There is this type also similar looking black round plastic boxes that are the transducer type that you need for the standard harness.

The one you chose is much louder though! If you source a 48v relay that would be a nice warning signal

[Bikemad]

Hi andto the forum.

Monkey is correct about the amount of current.

The GM horn button is a very simple momentary switch that is not designed to carry that much current, and you would probably burn the switch contacts in a very short time, assuming the voltage drop through the thin wires wasn't too much prevent the horn form working properly.

That horn would be a lot louder than a transducer/buzzer type, but do you really need it that loud? If so, use a 48V relay as Monkey suggested to switch the battery supply to the horn using heavier gauge wires to carry the extra current.

Alan
 

[stepir]

Thanks for the welcome and even more for your advise.

Was looking for something loud (specially for cycling in the traffic) but you are right that might be a little overkill  

how about this one?

same issue?

[Bikemad]

how about this one?

same issue?

Unfortunately yes, but that one also has the added complication of only being 12V!

If you have a 48V battery and want to use a 48V horn, a relay is relatively simple to wire up:



Obviously you will need a 48V relay as well.

Alan
 

[stepir]

thanks again Alan

the one MonkeyMagic suggested seems to be much more simpler to be fitted! will look for it.

thanks ciao

[stepir]

looking at the 2A horn: why I could not use the green switch to interrupt the ground rather than the positive contact?
That would avoid the current to flow through the switch without having to use a relay no?

[MonkeyMagic]

looking at the 2A horn: why I could not use the green switch to interrupt the ground rather than the positive contact?
That would avoid the current to flow through the switch without having to use a relay no?

No...

Direct Current has uni-directional flow, therefore regardless which wire you choose to switch you will find the current will travel through the connected circuit.

As a rule of thumb, GND wire is generally switched to avoid in-rush of current through a circuit - not to reduce it in any means as it's still the same current regardless.

Without jumping into something you may not have much experience with - I would go with Alans suggestion or alternatively if you really want a loud horn - why don't you use an Airzound instead? Those are super loud!!!!

Then you won't have to worry about power at all

[stepir]

thanks MonkeyMagic!

I've tried purchasing the very first one you suggested. Will see if the sound is enough loud