Horn relay wiring Help!

I have my horn installed and ready to wire it to the horn button on the mounted on the column. The relay I have has the following terminal numbers 30, 85, 86, 87. I need help determining the wiring. Those that have done it, please feel free to advise. Thanks!

 

http://www.earlycj5.com/forums/showthread.php?t=64439&highlight=horn+wiring
might help

 

The terminal numbers are not the same on the relay I have. Thanks!

 

I guess i'm missing something here, you say you have 30,85,86,87
the description says connect 30 to 87 on the switch side and 85 to 86 on the horn side.

 

Maybe I need to read the post again!

 

Many relays come with a diagram printed on them. one will be the switch ._/_. symbol. You will have one wire with fuse going to one side of switch and another wire to the horn. Power to the fuse should come from battery plus. Honk horn with ign "OFF". The other symbol will be a loose coil. This type relay hools up just like a fender mounted starter solenoid.

 

My undestanding of the write up for my relay:

Terminal #30- power from fuse block with inline fuse
Terminal #87- ground to frame
Terminal #86- I don't know
terminal #85- to the horn.

Is this looking close to what I need? the horn button has to terminal. A positive and a negative. Should the positive from the horn go to terminal # 86? Thanks for helping try to understand this, i will learn something out of it.

 

I just finished this horn relay install and used this write-up:

WWW.jeepfan.com/projects/headlight-relay2.htm

 

According to the write-up, your terminals need to be swapped around.

 

# 86 is from fused power, really it is your choice wether always hot or from switched power.

 

Sorry sent the wrong write-up, but it sure will work for your headlights!! LOL
I'll see if I can find the horn description.

 

Very good Rick. That answers his question completly.

 

My horn has
#30= terminal for wire to horn
#87=terminal from power source for horn
#86=terminal from horn button ( button supplies GROUND to activate relay)
#85=terminal to POWER source to activate relay.
Then one side of horn goes to ground as well.

 

OK Walt, my enthusiasm to help got the better of me!! R)

 

Originally Posted by LarryD
I just did this so I'll try to explain. Also there is an excellent write up in JP Mag. June 07.

A relay is a switch with 2 sides, a low amp side and a high amp side. The low amp side would be connected to a momentary switch like a horn button, a source wire coming from a fused source to terminal 30 then a wire to ground from terminal 87. when you press the switch the circuit is completed causing an internal high amp switch inside the relay to close. You then have a heaver wire from a high amp fused terminal to terminal 86 on the relay. Then another heavy gage wire from terminal 85 to the terminal on the horn. In my case there was a ground wire from the horn to the horn mounting surface to complete the circuit.

This makes for a really loud horn.

The relays are at Pep Boys for $5-6. I just got a Summett catalog today and they have relays with a wiring harness for about the same price.

I hope this makes sense.

OK, What connects to terminal 30?

 

OK, after checking I did have the wire terminals reversed. 30 and 87 are the low current or swiched side, terminals 85 86 are the high current of fan-light-horn or high draw side.
Sorry for the mis information.

 

This is the configuration that I used. By the way, #30 and #87 can be reversed as well as #86 and #85 can be reversed.
Rick

 

OK, What connects to terminal 30?[/QUOTE]

a wire comes from a 12 v source connects to a horn button. a wire goes from the horn button to terminal 86. a wire goes from 85 to ground. this is the low current or switched side.

a wire goes from a 12 v source to terminal 30. a wire then goes from 87 to the horn. this is the high current or device side.

sorry for the previously incorect information.

The configuration Rick describes is also correct, keep in mind switches are non directional so you can reverse my description of connections of wire 30 and 87 or wires 85 and 86 but you can not mix 30 and 86 or 85 and 87.

Hope this clears it up.

 

Sasspro, tell us what you have so far, you are probally close.

 

what amp fuse is required?