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Hot Rod Forum : Hotrodders Bulletin Board > Tech Help> Electrical> Ahooga Horn with Led Momemtary Button Control
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Topic Review (Newest First)
01-23-2013 12:19 PM
DEATHTRAP Wired the horn last night.
Everything went just fine.

Special Thanks to EOD Guy.





01-14-2013 08:49 PM
DEATHTRAP Horn alone...or horn and switch combined?
I thought this one would be okay, but I don't understand the 20/30amp spec.
Is it 20 or 30?
Makes me wonder if a 30/40 would be better then.

Tyco Bosch Relay SPDT 12 Volt 20 30 Amp with Socket | eBay
01-14-2013 08:43 PM
DEATHTRAP Yep...that's where I normally get different little parts from.
01-14-2013 08:39 PM
EOD Guy The relay amps should be equal to or higher than that of your horn.......
01-14-2013 08:37 PM
EOD Guy Glad I could help, if you're not in a hurry, ebay has just about anything you could ever want...
01-14-2013 08:36 PM
DEATHTRAP One last question...
How many amps should the Relay be???
01-14-2013 08:27 PM
DEATHTRAP I didn't know I could buy a socket for the relay either.
Great.
Hey Thanks alot for all the info EOD Guy !
It's very much appreciated.
You've really simplified something that may have aggravated the Piss out of me.
Hopefully all will go well.
Cheers.
01-14-2013 08:15 PM
EOD Guy It's called a bosch type relay, avail in just about every auto parts store, Radio Shack or....... I get mine from junked cars .... your looking for the five pins. On the side of most relays you will see the dia of what terminals are what....

To make the connections to the relay, you can buy a socket, I use female spade connectors, to tie the hots together, I use a spade connector, a short run of wire from both terminals into one end of a butt splice, the other end of the butt splice goes to the hot etc....

on the switch, just twist, then solder, them together and cover with heat shrink.
01-14-2013 08:11 PM
DEATHTRAP What kind of Relay to I need to buy?And how do you properly tie in the 86 and 87 pin on the relay to go to power, and the NO and Ground pins on the switch?Are you just twisting the wires together or is there a better way to do it?
01-14-2013 08:07 PM
EOD Guy It's always good to fuse all circuits, if your Aux source has a fuse you'll be fine not using an another fuse, those LEDs draw a tiny amount of juice and probably will smoke long before the fuse blows.
01-14-2013 08:06 PM
DEATHTRAP What kind of Relay to I need to buy?
And how do you properly tie in the 86 and 87 pin on the relay to go to power, and the NO and Ground pins on the switch?
Are you just twisting the wires together or is there a better way to do it?
01-14-2013 08:01 PM
DEATHTRAP Oh, I was just going to use those little connectors.

Thanks for the diagram, that helps alot.
I've never had to put in a relay.
So I should be able to tap into my existing aux line for power to the leds without having to worry about a fuse it looks like? And I'll just have to use an inline fuse from the relay to the battery? Does that sound right?
01-14-2013 07:57 PM
EOD Guy Here is a source for some Stainless Steel momentary mini switches, they are about the size of a pencil eraser. I really like them and have used them on many mods, they hide very well...... My latest mod on my 67 Camaro.... the window cranks are the power window switches etc..... I put a mini switch on the side of the dash, with a series of relays, so that when you press the mini switch, the drivers side window crank controls the passenger window.... completely hidden and looks completely stock. I put another mini switch just above the window switch that unlocks the doors.

Harley Mini Push Button Momentary Switch s Steel for Custom Applications | eBay
01-14-2013 07:49 PM
EOD Guy I found it hard to get it through the small hole..... if you can get it through it'll work fine....... The switches I bought had very small holes.
01-14-2013 07:43 PM
DEATHTRAP Regular 18-16g didn't work?
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