Yeah, why is there a need for the relay?

 

*watches

 

A relay would prevent the horns drawing too much current through the stock wiring harness. Similar when switching to HID. The headlight leads are such a small gauge that the initial start up draw from the HID ballast will eventually burn through the wiring insulation. As far as the horns go the stock wiring should be fine unless you switched over to an air horn setup with a high current pump.

I used stock Harley Softail horns on my tC without issue. The gauge of wire HD uses is actually smaller than on the tC, so I didn't install a relay. I was going to go with some "land yacht" style horns from the 70's or so, but I have always liked how the horn sounds on my Softail.

 

So with the Hella horns I can use the stock wiring setup and be oki???

 

i'd like to know too, but I'd imagine using a relay and connecting it to the battery will allow the horn to get the most power and function at its full (loudest) potential.

 

i used this thread to help install super loud air horns on my tC--
A relay wasn't used for this installation

https://www.scionlife.com/forums/viewtopic.php?t=215521

=]

 

DUDE THAT LOOKS SWEET

 

So does the relay come in the horn set?

 

DO hella horns really need a relay or no? will not using it cause the stock harness to burn or no ? are they plug and play?

a yess or no with out details will help me

THanks

im doing the intsail this weekend

 

^ the answer is it depends. people have posted that they got it working w/o a relay.... but others say that you should use a relay so you dont fry anything on the cars stock wiring harness.

for my hellas, i used a relay. in fact, since i have two sets of hella horns, i used TWO relays. overkill? maybe. but at least if poop hits the fan, i will only burn out a $5 relay and not some hundred dollar+ part on the cars wiring harness.

so the answer is it depends. personally, if i had to do it again, i would still go the relay route. you have less to worry about that way.

 

They've been holding up well for you?

 

they have been holding up very well for me. the screws on the horns have some surface rust on them but aside from that, they've been holding up really nicely...

the other day, i was considering getting a louder horn and replacing my current ones.. just for the hell of it... LOL.... i would go for the stiebel nautilius horns....

but i know myself. i'd probably get 4 of them. :-D

 

any sound clips on the horns ?

 

so the relay comes with the kit or that's something i gotta buy separate ?

 

the relay comes with the kit i believe....i juz ordered a kit.
can any1 help me with the relay set up thing...

 

Nice, very cool. I 2nd a vid or sound clip

 

i juz got my hella supertone horns today. inbox included relay, 2 horns !! how abt the wires ???

 

I'm still having a bit of trouble figuring out how to wire this sucker up. This image is the stock horn relay circuit. Can someone draw in how to wire the relay that comes with the horn? I'm much better at electrical diagrams than I am at photos of installed horns.



Thanks!

 

?!?!?! Did you check the first post? Explains it super clear how to do it.

 

Of course I did. I just have a better mind's eye for diagramming (I'm an engineer, it comes with the trade).

I'll elaborate a little on where I am confused, hopefully that will help clear things up.
In the OP it says relay point 86 is positive from horn harness. Point 87 is positive hella horn terminal. OP also says "tap one of the horn harness(which is a positive trigger) for the relay." I'm assuming this is what connects to pin 86 on the Hella relay. But that same wire IS plugged in to the positive terminal on the Hella horn (unless I'm missing something), so in my reading it says tap the positive lead to the horn, and run that to pins 86 and 87 on the Hella relay. Is that correct?

This is why diagrams are easier. No ambiguity.