Electrical Engineering g33ks and wannabe's - need help troublshooting the horns!!

[PGT]

well....several fuses and horn chirps later, I'm tackling the relays on this, the hottest day of summer so far.

 

Look about right??

 

http://www.rallylights.com/useful_info/useful_images/horns.gif

 

I've got a pair of new 20A relays (four pole) plus some older 30A Bosch relays. I also picked up some 14wg and two fuse holders. Do I need to wire each horn independently (one relay per horn), or can I cheat and do one relay triggering both?

[PGT]

everyone's a critic but nobody wants to help, eh?

[DeepFreeze2]

I would if I could, but I can't, sooooooo............................

[Guest]

Do the math, LGT. Stebel Nautilus draws 18 Amps. So one per relay. For two you need like ~40Amp relay, but then you need 40 Amp rated fuse holder. All I 've seen at local stores are 30 Amp max for some reason. I wired two Magnum horns (12A each), I am adding one Nautilus, so I'll end up with two relays setup.

[Guest]

Also, advantage of two relays is redundancy. If one fails, one horn will work. Of course the factory relay is the single point of failure...

[Guest]

The diagaram looks ok (if you had 40A relay).

[PGT]

meh....rated load with electronics isn't as simple as A+B.

[Guest]

Alright, electricity was not my strong point... somehow 2x18A on single 20A relay does not seem probable...

[PGT]

agreed, but I have a pair of 30A as well, thus my Q. 2x18A might work fine on a single. I'm going to wire up both....I like your suggestion of some redundancy, besides they might be louder with independent power sources.

[red beast]

go up on your deck and look at her

[PGT]