horn..

[oc_civic]

help me EASILY rig up my horn to a momentary switch??

i dotn need a horn.. i think its useless... and with a momo wheel and a disconnect getting the horn to work is a pain.. but i want to hook the actual horn up to a momentary switch that i can put somewhere in the car... dont really care where.. can someone tell me how i could do this.. it doesnt have ot be pretty.. it just has to work... thanks..

 

[Crave]

The diagram above assumes that you do not want the horn to work when the car is off.

First, you need to find a +12v power source somewhere in your dash. If you want to horn to only work when the car is on, find a wire that turns on when you turn your car on (the wire that turns your stereo on will work). If you want the horn to work when the car is off, you need to find a wire in your dash that is a constant +12v (you can also use a wire that goes to your stereo).

Now that you have found thw +12v wire, hook that to one of the connectors on the switch, hook the other connector on the switch to the #86 plug on the relay.

Hook the #85 plug on the relay to a good chassis ground (just about metal part of your car will work).

Hook the #30 plug on the relay to the positive terminal on your battery. It is a good idea to put a fuse inline here, 5amp should be fine.

Hook #87 on the relay up the positive wire on the horn. Hook the negative wire on the horn to a good chassis ground.

Now when you press the button, it will activiate the relay, which will turn on the horn.

Parts list from Radio Shack:
12v Relay, PN 275-226, $6.29
Inline fuse holder, PN 270-1213, $2.39
5 amp fuse, PN 270-1079, $1.49
Crimp-on Quick Connects, PN 64-3058, $1.69
Momentary Switch, PN 275-618 (or similer, pick one you like), $2.29
15ft or so of 16gauge wire, about $5

Total price is about $20.

If you want to go ultra cheap (but not too safe) you can leave out the relay and hook the wire from the switch directly to the +12v on the horn, then just ground the -12v on the horn to the chassis. I don't recommend doing it that way, but it will work.

 

[oc_civic]

The diagram above assumes that you do not want the horn to work when the car is off.

First, you need to find a +12v power source somewhere in your dash. If you want to horn to only work when the car is on, find a wire that turns on when you turn your car on (the wire that turns your stereo on will work). If you want the horn to work when the car is off, you need to find a wire in your dash that is a constant +12v (you can also use a wire that goes to your stereo).

Now that you have found thw +12v wire, hook that to one of the connectors on the switch, hook the other connector on the switch to the #86 plug on the relay.

Hook the #85 plug on the relay to a good chassis ground (just about metal part of your car will work).

Hook the #30 plug on the relay to the positive terminal on your battery. It is a good idea to put a fuse inline here, 5amp should be fine.

Hook #87 on the relay up the positive wire on the horn. Hook the negative wire on the horn to a good chassis ground.

Now when you press the button, it will activiate the relay, which will turn on the horn.

Parts list from Radio Shack:
12v Relay, PN 275-226, $6.29
Inline fuse holder, PN 270-1213, $2.39
5 amp fuse, PN 270-1079, $1.49
Crimp-on Quick Connects, PN 64-3058, $1.69
Momentary Switch, PN 275-618 (or similer, pick one you like), $2.29
15ft or so of 16gauge wire, about $5

Total price is about $20.

If you want to go ultra cheap (but not too safe) you can leave out the relay and hook the wire from the switch directly to the +12v on the horn, then just ground the -12v on the horn to the chassis. I don't recommend doing it that way, but it will work.

thank you for the AMAZING response! hoy s**t.. lol

its JUST for inspection.. so i MAY just put the stock steering wheel back in.. but thank you VERY much man.. excellent info..

 

[oc_civic]

ok i have another question.. on my honda factory steering wheel there is a horn button (momentary switch) that plugs into a harness.. so cant i cut that harness and run the wires right from there to a momentary switch... and then at that point it would act exactly like the horn?

 

[io_303]

ok i have another question.. on my honda factory steering wheel there is a horn button (momentary switch) that plugs into a harness.. so cant i cut that harness and run the wires right from there to a momentary switch... and then at that point it would act exactly like the horn?

thats what i did whith my mom's tempo when the horn was stuck on

 

[oc_civic]

any idea HOW to go about doing that in a civic.. i mean i CAN run wire all the way to the horn.. but it would be easier if i could just tap this wire in the colum...

in other words take what wire in the colum and run it to what other wire.. with the switch in the middle..?

 

[io_303]

i just took off the plastic found out the wire colors in the hayns manual, and cut it, after that it was just extending and running to a switch

 

[oc_civic]

ok i see that the wire ends at a ground.. with a switch in the middle.. but cant figure out which wire in the colum it is...

 

[Crave]

I wish I could help you further but I have never taken my steering wheel off. If you don't care to use the horn in the future, just put your old one back on for the inspection.

 

[oc_civic]

I wish I could help you further but I have never taken my steering wheel off. If you don't care to use the horn in the future, just put your old one back on for the inspection.

i gave up after about an hour.. and some how passed inspection.. lol

BUT thanks a LOT for attempting to help..

 

[Spencey]

thank you for the AMAZING response! hoy s**t.. lol

its JUST for inspection.. so i MAY just put the stock steering wheel back in.. but thank you VERY much man.. excellent info..

You don't necessarily have to tap the switched ignition wire in the dash. You can also tap constant, which will be a larger gauge white wire in the ignition harness. Ignition is black/white in a Honda and the starter is black/yellow. I woudn't just go tapping and testing wires, use a multimeter or test light if you have one of the two available to use. These wires are located directly behind the lower dash pad at the bottom of the metal crash plate under the steering column.